Aluminium Windows Guides & Resources

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Do Double Glazed Windows Reduce Noise?

A double glazed window can serve as a sound barrier thanks to the sound insulation and thermal insulation materials. Many people are concerned about the noise disturbances in their homes. They may want to be able to study, work or simply enjoy a good night's sleep while others converse or listen to television, music or other audio at a high volume through a open window. Furthermore, noise such as traffic can cause greater lifestyle and health problems. A [double glazed window](/guides/aluminium-windows/how-do-double-glazed-windows-work) can serve as a sound barrier thanks to the sound insulation, thermal insulation materials and glass that they are made from. Usually, the two frames of glass of a double glazed window have an inert gas injected in between them. This process, known as sputtering, fills the space between the glass panes with an insulating material that reduces noise transmission through conduction or air flow. Naturally, through this sound barrier your neighbour's loud music and unwanted noise will be considerably quieter if you have double glazed windows installed in your home. From another perspective, insulation also prevents outside noises from disturbing your sleep at night when neighbours and traffic are typically much less active than during the day. Consequently, double glazing can substantially improve the quality of life in your own home, with the added bonus of significantly reduced heating costs from a reduction in air flow. However, double glazed windows and doors do not provide 100% noise reduction and thus will not block outside noise entirely. The most soundproof double glazed windows will reduce noise levels by up to 50%, which is still a significant difference. This means that you can install double glazing without sacrificing your lifestyle or connection with neighbours, while simultaneously enjoying better sleep and more efficient energy usage. It is highly recommended that homeowners install double glazed windows and doors or replace existing windows if they wish to reduce noise levels and enjoy more peace and quiet within their home environment. ## Are double glazed windows soundproof? The thicker the glass frame is, the better it will insulate noise and help with soundproofing. Double glazing or triple glazing are terms used interchangeably in regards to their effectiveness at more noise reduction. Triple glazing makes slightly better soundproof windows than a double glazed window, with 3 panes of glass instead of 2 panes of glass and having an extra layer of inert gas injected between them. On average, double glazing reduces noise by about 25-50%, depending on how well it has been installed. It is important to ensure that perfect measure is used and that the space between your pane of glass and the sputtering material is tight, as air leakage will negate noise reduction to completely soundproof windows. Noise reduction also depends on the frequency of the sound; low frequencies are more difficult to block than high ones. Newer windows and glass tend to be much better at blocking outside noise and sounds than older ones. While double glazing your windows does not block all sounds and noise like advertised by some companies, it does significantly reduce external noise coming into a home. It may even help with reducing heating bills. Double glazed windows are certainly soundproof enough for most homeowners to live comfortably, with the most recent installation techniques being even better at noise reduction. ## What glazing is best for noise reduction? [Triple glazing your window glass](/guides/aluminium-windows/what-are-triple-glazed-windows) does not soundproof better than double glazing or than a single glazed window by a significant enough margin to justify the increased cost. However, there are a few things you can do to your existing windows in order to increase noise reduction from outside and within your home: Ensure that all of your window frames properly fitted and is fit for the style of window you have chosen. Aluminium windows and doors should be sealed shut in order to create a sound barrier as wooden ones which absorb more noise. Wood also absorbs more heat making it particularly useful if you live in an area where winter temperatures get low. Ensure that their aren't any gaps between one pane and another and all frames of glass are tightly sealed. This can be done with acoustic putty or weather-stripping. If you live in an area where there is a lot of traffic noise, consider replacing your standard windows with windows that are double glazed on the road facing the side of your house (if possible). The noise will be blocked by the mass of the wall and the insulation properties of your home. Adding insulation [to your windows](/guides/aluminium-windows/why-are-double-glazed-windows-good-insulators) or within your walls can reduce noise from transferring through interior spaces making your house soundproof, but some exterior noises may still manage to leak through. Nevertheless, it is usually more practical than making external modifications like installing new windows (though sometimes this is unavoidable). Finally, remember that while double glazing does not make your existing windows entirely soundproof by block all exterior noise , it is certainly better than the alternative. Double glazing is an ideal solution that offers a significant noise reduction where it matters, with the benefit of cost savings. ## How much quieter is double glazing? As the double glazing has two panes of glass with a wider air gap or gas between them, it is far more superior for noise reduction compared to the standard single pane of glass. For soundproofing, double glazing works much better than triple glazing. ## Double glazed windows vs U-value With regards to energy efficiency, there is essentially no difference between double glazing and single glazing your windows because they have almost identical U-values (a measure of thermal conductivity). Some people may argue that having two panes of glass will reduce heat transfer by 50%, but this only works if the air is trapped behind them - otherwise, it would be like having a single pane of glass. As such, double glazing offers almost exactly the same insulation as standard ones. The New South Wales State Government has an [explanation guide to U-values](https://www.basix.nsw.gov.au/iframe/198-archived-help-notes/521-window-types.html). Double glazing does help with noise reduction to a significant extent and can even reduce your heating bills (if you live in a noisy area). Triple glazing is not necessarily any better at reducing both sound and heat loss; this would only be true if air was compressed between two layers of glass. It would also make the windows and doors much less transparent. ## How to make windows soundproof? There are a number of things you can do to make soundproof windows and maximize noise reduction. The first thing is to ensure that each air gap between each pane of glass or frame of your window are tightly sealed. This can be done with acoustic putty, weather-stripping or even strips of adhesive moleskin. The second thing is if you live in an area where there is a lot of traffic noise, consider using double glazed windows on the road facing the side of your house (if possible). The noise will be blocked by the mass of the wall and the insulation properties of your home. You could also reduce heat loss from your home by adding insulation to or within your walls as this will make it harder for sounds to enter from outside. Finally, remember that double glazing does not entirely block all exterior noises, but it is certainly better than the alternative. ## How many decibels does double glazing block? How much noise a double glazed window blocks depends on a number of factors including the design, different thicknesses of glass and type of sealant. It is difficult to assess the extent to which a different type of glass or frame will be soundproof as this varies between manufacturers. A better way to gauge how much noise will be blocked by your window is to take sound level readings before and after installation. This can be achieved by buying an SPL meter (sound pressure level meter) which will allow you to test the levels in various rooms throughout your home. Once you've recorded the existing figures it's simply a case of repeating them with your new windows fitted. We should point that professional acoustic consultants often rely on double-glazed windows to reduce noise in the workplace. ## What decibel level does double glazing cut out? Double glazing will vary between different types and manufacturers but most will block at least 30% of outside sound or noise, and up to around 70% in some cases. This is equivalent to approximately 4dB reduction in volume for every doubling of distance (40dB - 20dB). Double glazing can be extremely effective at cutting [household running costs](/guides/aluminium-windows/why-are-double-glazed-windows-energy-efficient) as well. As such a standard single pane window would be roughly equivalent to having an SPL of 45dB inside the room if directly outside your window. The average amplified rock concert can reach around 110db which equates roughly to having a window with 90% light transmission.

What Do Double Glazed Windows Do?

Double glazing refers to a type of window that has two sheets of glass separated by a still layer of air space or gas. The main purpose of this system is to provide a insulated glass unit that makes a place more energy efficient, improves it's thermal insulation and reduces heat loss through the windows as well as help with noise reduction from within and outside the building. Moreover, double glazing also helps reduce condensation and provides a far better thermal performance than single glazed windows. These [insulation properties](/guides/aluminium-windows/why-are-double-glazed-windows-good-insulators) of a double glazed window come from the use of low emissivity coatings on either or both surfaces as well as creating an air space between the two glass panes, which adds to the insulation properties, with the optimum air gap being 150mm or over. In addition, argon gas or krypton is often used in this air gap to provide even further insulation benefits. To complete the system, the gas is often sealed inside a double glazed unit. ## When should you use double glazing? Double glazing can be used when people want to reduce noise levels in their immediate surroundings. This could be because of exterior noise such as traffic or aircraft passing overhead or it could be from noise generated by neighbours or roads close to where they live. Double glazed unit also has applications in commercial situations where there are lots of people around e.g. bars and restaurants with open areas between tables/customers and entrance/exit points [for reduced noise](/guides/aluminium-windows/do-double-glazed-windows-reduce-noise). The insulation properties of double glazing will help reduce the ambient temperature in the room which in turn helps to control air conditioning costs in some instances although this may not always be cost effective if large areas are involved in particular cases . ## What are the benefits of double glazing your windows? Double glazing window units offer many important benefits. The first benefit is that they help with sound reduction, as mentioned above. They can substantially reduce noise by as much as 20-30 decibels (dB). The glass acts as a sound barrier that reduces the amount of outside noise entering a room and disturbing occupants within it. Another benefit of double glazing your windows is that by being energy efficient and having better thermal performance, double glazing all our windows can help insulate against heat loss and gain and therefore help to regulate the temperature between rooms and floors to provide consistent warmth/coolness level in all areas. In commercial situations, this helps to reduce energy costs by managing air conditioning systems effectively and ensuring there is no overcompensation which wastes money. Last but not least, double glazing provides an aesthetically pleasing visual appearance and can also increase your homes resale value. ## What types of double glazed windows are there? There are a number of different kinds of double glazed units. These include uPVC double glazed windows, aluminium joinery units and wood joinery units. Aluminium joinery units tend to be more lightweight for ease of installation (and reduced cost) but they don't provide the same insulation properties as the other types. Wood joinery units provide extra insulation benefits which mean that heat transfer is reduced by 50% when compared to single glazing. This makes it an option where higher levels of insulation are required i.e. in regions with very cold climates or buildings with glass surfaces exposed to potential heat loss. ## How do double glazed windows keep heat in? There are many factors that contribute to the efficiency of double glazing units. These include the thickness and quality of glass, type of gas used in the space between panes, how tightly packed your window frames are and whether a Low-E coating is applied to one or both surfaces as well as clips that hold everything together firmly. All these features combine to provide higher insulation values which help to keep cold air out and keep heat inside buildings during winter months where temperatures fall below zero degrees Celsius. ## How does double glazing windows keep heat out? It's important to take into consideration that windows are normally not the only source of heat loss or gain in a building. Studies have shown that windows account for around 20% of heat transfer in an average home whereas doors make up 50%. This means it may be more effective when considering whole-house solutions to improve draught-proofing and insulation levels throughout the entire property, which will make double glazing choices even more cost-effective and [energy efficient](/guides/aluminium-windows/why-are-double-glazed-windows-energy-efficient). ## Does double glazing reduce heat from the sun? Double glazing helps to reduce the amount of heat entering a building through windows. This is achieved by using both glass panes and additionally an air gap, which is filled with inert gas such as argon gas providing even better insulation than just having two panes of glass alone. By filling this space between the two panes of glass with gas, it reduces convection currents that would otherwise transfer heat into your home or office more effectively if they were able to enter via the windows. ## Do double glazed windows save energy? Yes, double glazing works to provide substantially higher levels of insulation and energy efficiency then compared to single glazed windows that aren't that energy efficient. The increased glass thickness in the construction of the two panes of glass offers significantly higher levels of resistance to temperature fluctuations throughout different seasons and also prevents heat loss and reduces wasted heating/cooling costs by ensuring there is no overcompensation/under-compensation and the overall environment is maintained at a comfortable temperature. Windows that are particularly exposed to heat and warm air will provide greater solar heat gains which result in significantly higher levels of heat transfer into a home or office if they were single glazed windows. A double glazed window can help retain heat inside a home during winter and help insulate cool air inside keeping your home cooler during the summer months. This helps reduce reliance on mechanical heating and cooling systems which ensures energy efficiency reducing energy costs and enhances sustainability. However, the framing material you use to make your window system can effect how energy efficient your double glazing is. ## What glass do double glaze windows use? Double glazed units normally use either low-iron glass or clear float glass. Low-iron glass provides a greater level of insulation from heat transfer compared to standard float glass however, the trade-off is that it has lower clarity. Clear float glass provides higher levels of transparency and visual clarity which make it a better selection for residential applications where natural light is considered more important than building security. A spacer bar made of metal or polymer strip is used to separate the two panes. ## How do you measure double glazing? There are several different types of measurement systems used when specifying double glazing units. The most commonly used method is known as 'U' value or thermal transmittance rate on an international scale where U represents the overall conductivity i.e transmittance of heat energy through a window assembly divided by the difference of temperature across the window, measured in W/m2K. ## What does "U value" mean? As with most materials, double glazing will improve the thermal performance of the windows by reducing radiation. This indicates the level of heat energy transferred through one unit thickness (or area) for every degree difference in temperature across the window, measured in W/m2K. The New South Wales State Government has a handy [guide to U-values](https://www.basix.nsw.gov.au/iframe/198-archived-help-notes/521-window-types.html). ## What is Low-E glass? Low-E is an abbreviation for low emissivity or low emission and refers to the coatings that are applied to either one or both surfaces of a high-performance low e glass unit when double glazing. These coatings act as invisible barriers to radiant heat transfer by limiting the amount of infrared energy emitted from inside a building which otherwise would be lost due to solid opaque materials like single glazing. Since these coatings can block up to 99% of this radiation it helps reduce the transfer of heat during the winter months and reduces unwanted heat gain in the summer. ## How do you measure Low-E coating? When specifying double glazed windows that include Low-E coatings there are two international ratings to be considered: Solar Heat Gain Coefficient (SHGC), which is a measurement of an entire window assembly's ability to transmit short wave solar energy while retaining longwave thermal radiation; and, emittance (or emissivity) - how much radiant heat a window will emit. The lower the SHGC and emissivity rating, the better it is at reducing unwanted solar gains throughout different times of the year while simultaneously limiting undesirable levels of radiant heat loss from inside a home or office. Glazing selection can depend on what purpose the windows are being installed for. Choosing double glazed windows can have a significant effect on noise reduction with additional benefits of insulation provided by the extra pane inside. While installing a double glazed window it is important to consider factors such as whether or not you want natural light entering your home, how much heat loss you would like to eliminate and if your house or office is in an area prone to high levels of traffic noise when considering which type of glass is best for your project.

What are Triple Glazed Windows?

Triple glazing is excellent choice for individuals who are looking to save money on their energy bill. Triple glazed windows are three paned, triple-layered glass used in window design. When you combine several panes in this way, you multiply the insulating effect and the thermal performance of the window, resulting in better energy efficiency and helps prevent heat transfer resulting in a warmer home. This reduces both noises from outside and inside temperatures and helps achieve a far lower u value to around 1.1 compared to the u value of single glazed glass which is 5 and the u value of a double glazed glass. Triple glazing is often offered when replacing existing frames in an effort to improve insulation in older buildings that may still rely on single glazed windows. However, newer building projects are increasingly using triple glazing for new windows too, thanks to its low energy consumption and thus low maintenance rates, and minimal environmental impact compared to other insulation methods. ## How are triple glazed windows manufactured? The process of manufacturing triple pane windows is quite simple. It begins with two glass panes sandwiching a sheet of vinyl or plastic sealant, which is then cut into pieces that fit the size and shape of the window frame. These pieces are bonded together using heat and air pressure to form one piece. The edges of this single pane are ground down until they're smooth, which addresses many problems associated with visible seams. The main drawback to installing triple glazed windows is their hefty price tag. Triple-heat resistant glass can cost anywhere from 50 per cent more than standard double glazed ones to twice as much as double pane windows, depending on how efficient it's intended to be. ## What are the advantages of triple glazed windows? While triple glazing is called out for being used mainly in cold climates, they actually hold several benefits and be an excellent choice for just about any region. The photo-voltaic cells that generate electricity in many home solar energy systems work most efficiently when there's a relatively constant flow of heat through the window. These windows are great at blocking outside heat, so they keep hot air and more heat from getting in your house through the walls when it's cold outside and vice versa and they also prevent cold spots in an overall well heated place. Another benefit to triple pane windows is noise reduction. Triple glazing can reduce traffic or street noise by up to 50 percent, which makes them great if you live on a busy road or near an airport. Moreover, people looking for a quieter home and increased security with [maximum energy savings](/guides/aluminium-windows/why-are-double-glazed-windows-energy-efficient) can highly benefit from triple glazing. The extra layer of these windows help conserve energy making it more energy efficient resulting in reasonable amount of savings in the long run. ## What are the disadvantages of triple glazed windows? One of the biggest disadvantages to triple glazing is the high price tag. The heat-resistant glass can cost anywhere from 50 per cent more than standard double pane windows to twice as much as double pane windows, depending on how efficient it's intended to be. Another drawback to triple glazed windows is that they are extremely difficult to repair if one should break. This is because each layer of glass has a different thickness and can be located in different positions within the window itself. Instead of attempting to replace individual pieces, many installers will simply replace the entire window with a new unit. ## What are the alternatives to triple glazed windows? If you're not ready to make a complete window replacement with triple glazing, there are other options available. Existing frames that are double glazed can be fitted with one more pane of glass or plastic film that's made especially for double glazing. These wafers come in a variety of thicknesses and degrees of heat resistance, so your local window installer should be able to recommend a solution based on your climate and heating needs. Alternatively, you could consider triple-pane windows that are made using two sheets of glass with a sheet of foam in between. While these windows can't hold a candle to the real thing, they're significantly cheaper and still do the trick when it comes to heat insulation. ## What is the R-value of triple glazed windows? Triple glazed windows have a higher R-value than double-pane windows. The higher the R-value, the better your windows are at insulating. These windows have an R-value of around 4.0 or 5.0 per inch, which is significantly better than many competitors. Take a look at the Australian Government's Your Home website for more [information about R-value.](https://www.yourhome.gov.au/passive-design/insulation) ## What is a triple glazed window made out of? While most window frames are manufactured from aluminium, steel or wood material, triple-pane glass is often composed of a mixture of ordinary silica and argon gas. The addition of this gas means that triple pane windows do not require any additional vacuum to keep their structure strong and sturdy. One of the most popular materials used in the frame of a triple glazed unit is the uPVC or a low e glass. This makes them perfect for use in places where there may be regional disturbances such as earth tremors. Triplex glass can alternatively be referred to as 'triple strength laminated glass' and is manufactured in the same way as laminated safety glass. ## How are triple glazed windows installed? The first step in installing triple glazing is to ensure that each frame is completely airtight. Any space or holes will lead to leakage and reduce the window's performance significantly. Once this has been confirmed, insulating spacers called gaskets can be used to hold each individual sheet of glass apart at just the right distance before they're all sealed together using rubber seals around the edges. These windows are a great choice for any home, thanks to the fact that they have a high R-value and can reduce noise pollution from outside by up to 50 percent. ## What is the cost of triple glazed windows? Triple glazing costs anywhere from 50 per cent more than [standard double glazing](/guides/aluminium-windows/what-do-double-glazed-windows-do) to twice as much as double glazed windows, depending on how efficient they're intended to be. This price difference can be largely attributed to the thickness of each individual piece of glass in a triple pane window. For example, triple glazing with an R-value of 5 will usually use 2mm or 3 mm thick glass, while double glazing with an R-value of 2.5 will often use 3mm or 4 mm thick glass. ## Can you install triple glazing yourself? If you're not sure that your window installation skills are up to scratch, a triple glazed window can be purchased as 'inserts' which simply need to be inserted into the existing frame of your windows. This means that you don't have to replace your entire windows in order to make them more efficient. ## What are triple pane windows made of? Triple pane windows are made up of three panes or layers of glass. The two outer layers contain the same amount of glass as a standard window pane and provide structural support for the window. The interior layer is much thinner than normal and contains trapped argon gas between the panes to increase thermal insulation. These increased number of frames significantly affect the energy efficiency of such windows and provide insulation. The main drawback with this design is that it makes the windows significantly thicker than ordinary double glazing which may be an issue if you're working with particularly slim frames. ## Are triple glazed windows worth it? Triple glazing can improve the overall energy efficiency and thermal performance of your place and help cut your energy bills by up to 25 per cent compared to single glazing because they prevent heat loss, and can even reduce sounds from outside by as much as 50 per cent than single glazing. These windows are a great choice if you're looking to improve your home's insulation or save on your energy bills. Thanks to their superior R-value, triple glazing is the perfect way to cut down on heat loss during the winter months.

What Causes Condensation on Double Glazed Windows?

You can prevent condensation on your windows overnight by ensuring that the humidity within the room is kept low. Several factors may cause condensation between panes in a double glazed window. ### A flaw or defect in the glass This is rare, and it's not possible to tell without actually looking for any flaw. The glass can be tested using various tests, one of them being the air leakage test which will indicate if there's air circulation in the vacuum space between the [insulated glass unit.](/guides/aluminium-windows/why-are-double-glazed-windows-good-insulators) - An interior build up of humidity inside the house is mainly caused by residents. It can also result from the use of appliances such as an aquarium, cooking activities, or hot water in the bathroom. - An accumulation of humidity caused by a humid exterior environment can lead to double glazing condensation. ### A cracked sealed unit A broken window seal is also a likely cause of condensation in double glazing windows. A crack in the window seal will release the gases between the outside and inside pane, interfering with the heating and cooling capabilities of the windows. Cracks allow water vapour to infiltrate the windows. If the problem, especially the breakage of the inner seal, cannot be solved, your installer might recommend the replacement of the entire window with new windows. ### Temperature difference If there is a humidity level difference between inside and outside air, we'd expect condensation on double glazed windows when it's colder outside than inside. That's exactly what happens in wintertime. On the other hand, if it's warmer inside than the surface temperature outside, as would normally be the case during summer months, then there shouldn't be any condensation in double glazing glass panes even though they are next to each other. ### A condensation problem A combination of humidity build-up, coldness, and exterior air pressure (that's why it's more common on the top than the bottom). The latter cause is generally the cause in summertime, warm air rising from inside which causes condensation to form between glass panes around the top part of the window. ## How do you stop condensation on double glazing? This is a common problem that affects windows and doors where the panes of glass are separated by airspace (known as double glazing). The solution can be as simple as adjusting the way you open and close the window, opening it fully, closing it completely, and keeping it closed for several minutes. If rainwater has been allowed to pool on the inside surface, use a cloth or squeegee to wipe off the window sill of any excess water. You can also try raising your blinds or curtains, which will improve ventilation in your room. Another precaution in preventing condensation is not to place radiators under windows as this traps humidity inside the glass pane. It may even be possible that if you have fittings such as extractor fans that draw air from outside into vents located close to windows, this may also stimulate condensation. When the air inside the room becomes humid, it will then come into contact with the cold interior pane and form more moisture. This can be easily wiped away using a cloth or squeegee. ## What do you do if you have condensation on double glazed windows? It is also possible that the condensation you see building up on your windows could be due to high humidity levels within the room. For instance, water vapour build-up on windows is also noticeable when cooking and enjoying warm baths. If this appears to be the case, then opening your window just a few inches by either tilting it downwards or propping it open slightly will allow humid air to escape and improve ventilation inside your room. If there are any extractor fans or vents located close to your windows that are drawing moist air towards them, try closing these as this may have an effect on causing condensation to form. This should only take a few moments before visible moisture starts to disappear from the glass. ## How do you stop condensation on windows overnight? You can prevent condensation on your windows overnight by ensuring that the humidity within the room is kept low. A simple way that releases moisture is to open your window for a few minutes, which will allow humid air to escape and help to reduce condensation on the inside. If you are concerned about the safety risk associated with opening windows at night, it may be possible to install an automatic ventilation system that will automatically carry out this task. ## Does moisture get trapped inside double glazed windows? Moisture can become trapped inside windows if they are not sealed correctly; there may even be gaps that develop over time that lead to greater volumes of moisture forming between the inside and outside pane. This may also happen around frames or where you open and close your window on a regular basis. When cold air comes into contact with warm, humid air, droplets will form on the cold surface, which makes up part of your double glazed unit. If repeated condensation is not dealt with, it can lead to rotting and mould growth in the affected areas. Most double glazed windows have a square rebate at the joints of the window frames. It is a section where moisture can get trapped, leading to condensation in double glazing windows. ## Is there a window treatment that stops condensation? There are many different types of window treatments that may help you reduce the amount of condensation that forms within your home. Most treatments will also come with an insulating feature that can help to keep warmth inside your room during the winter months. One example is external blinds which are fitted directly over windows. They allow heat and light in whilst preventing heat loss at night time. The gap between the two panes is also kept to a minimum which reduces the risk of moisture building up between them. Alternatively, you can place curtains alongside your windows; this allows you to control ventilation levels by controlling how much air comes into contact with the glass surfaces. They also allow sunlight in during cold months when it's needed most. For more information on glazing, take a look at the [Your Home website.](https://www.yourhome.gov.au/passive-design/glazing) ## Will double glazed windows fog? Double glazed windows will often fog up when a significant change takes place within your home. This can occur during a cold night, where warm air becomes trapped inside the room and mixes with cooler air outside that makes its way into your home. Many of us have experienced this sensation after boiling large kettles of water. The fog then creates mist on window panes. Double glazed windows tend to reduce this risk as they prevent the moisture inside from escaping outside, which means that it's more likely to come straight back in towards the pane. If you want to stop double glazed windows from fogging up, you should always ensure some form of ventilation inside your room or use blinds that allow controlled airflow between the two panes. ## Are double glazed windows expensive? Double glazing tends to be more expensive than standard single glazed windows. However, you can expect them to offer a reduction in condensation and fogging. Some forms of window treatment also offer added insulation features to reduce energy bills and make your home warmer throughout the winter months. There are several benefits associated with having double glazed windows installed; They are [energy-efficient](/guides/aluminium-windows/why-are-double-glazed-windows-energy-efficient), saving on energy costs. They increase the value of your property and make your home more comfortable for all. ## How do I stop condensation on my living room window? As mentioned before, condensation that appears on the exterior surface of your building may be due to changes in temperature, which often occurs at night time when heat is no longer retained within your living room. This can prevent double glazed windows from fogging up in the evening, which is a common reason for moisture becoming trapped between panes. If you want to remove any condensation that appears in your living room, it may be possible to install a secondary ventilation system that will allow excess heat and humidity to escape into the atmosphere. You can then control airflow by opening or closing your window when necessary - this should also help stop the build-up of moisture on glass surfaces. An additional alternative is the installation of an extractor fan. The use of an extractor fan or a dehumidifier is particularly ideal in setting that release excess humidity and water vapour into the air. They suck and allow water vapour and heat escape minimizing the condensation problem.

Why are Double Glazed Windows Energy Efficient?

There are a number of reasons why double glazed windows offer better insulation than single glass. Double glazing windows provide a level of sound protection, as well as blocking the sun's rays from entering your home. The most important benefits, however, come from the interactions between the panes themselves and how they work together to help reduce heat transfer. Double glazing panes work by trapping a gas between them. This gas is usually Argon or Krypton; two gases used quite frequently in the insulation industry because they do not react with other chemicals. This lack of reaction makes it safer for humans to live around these types of gasses without having to worry about them corroding breathing apparatus, poisoning us, or reacting with other gases in our homes. By trapping this gas within the air space between the panes, an airtight seal blocks air from entering and escaping the home. By blocking out all drafts and wind, heat transfer by conduction and convection is reduced. Of course, these benefits don't come without some drawbacks; increased thickness means increased weight which makes handling difficult and double glazing can be expensive compared to single pane glass. Even though they may not be quite as efficient as triple glazing glass windows at stopping heat transfer, [their ease of use and low cost](/guides/aluminium-windows/why-are-double-glazed-windows-good-insulators) make them a worthwhile investment. Double glazing windows are also more effective when combined with other types of insulation. This means that they work together to create a better seal, resulting in the home's entire energy efficiency improvements as a whole. ## What is Argon and Krypton gas? Argon and Krypton are two inert gases that do not affect humans or any other living organisms. They do not corrode equipment we use to breathe, nor do they react to any other chemicals found around our homes, such as moisture, natural gas and so on, as long as the concentration remains below an average of 1%. This makes Argon and Krypton ideal for use in double glazing, where two panes of glass are kept separated by a space filled with this gas. This creates a sealed unit that is almost completely impervious to the elements, helping to prevent heat transfer into or out of your home during certain seasons. ## What kind of window styles come with double glazed windows? Double glazed windows can be found in many different styles and colours depending on how they are fitted within each unit. The most common kinds include bay, box, patio (sliding), vertical slider, casement (crank handle) and sash (double-hung). Each features its own benefits in terms of light intensity, airflow and general appearance, which you should keep in mind when assessing your options. ## How do double glazed windows reduce heat transfer? Heat always moves from warmer areas to cooler places, and this is exactly what happens when your home gets too hot through the summer months. Double glazing window pane pairs work by reducing the rate at which this movement occurs to reduce heat loss from your home. In summer, the double glazing windows keep out the unwanted heat keeping the home cooler. This happens by creating a sealed unit made up of two panes held apart by a space filled with argon or krypton gas. The airtight seal created by this method prevents airflow through any cracks or crevices and keeps out drafts and blocking all conduction and convection. A metal or polymer strip separates the two panes. A drying agent is usually added to the metal or polymer strip to suck in the moisture that may get trapped between the insulated glass units. When you look at it like this, it becomes clear why double glazed windows reduce the amount of heat transfer within your home; they simply stop wind and other factors from entering during the summer months while still allowing light in during winter. ## How energy efficient are double glazed windows? In comparison to single glass panes, double glazed glass types are energy efficient windows. They are almost twice as efficient at stopping heat transfer from occurring compared to single glazed windows. While this may not seem like a significant improvement on paper, it really does make a difference when you take into account the sheer number of windows within your home. That's a lot of room that could otherwise be used by the sun during the winter months, resulting in loss of warmth throughout your home. It's a wise investment to choose double glazed windows to help you improve energy efficiency and noise reduction in your house. ## Are double glazed window units easy to clean? Double glazed windows are very simple to clean because they have two panes made from extremely hard-wearing, low maintenance materials such as tempered glass or toughened glass. This means there is no risk for your cleaning tools to slip and cause damage or injury when you are wiping off any dirt or mould on the surface of the pane. As long as you follow common-sense safety precautions and use the recommended tools and equipment, you should be able to clean your double glazed windows regularly without any difficulty. Just make sure you avoid using anything too abrasive or sharp on the inner pane, as this may cause damage. ## What are the benefits of Argon filled double glazing? Argon is one of the most commonly used gases for filling double glazed window panes because it has so many unique properties which benefit homeowners in different ways. For example, Argon only reacts with other chemicals at very high temperatures, which prevents gas leakage within each unit if they are ever damaged in some way. It is also a poor conductor of heat, which means that it does not easily transfer the warmth from inside your home into the surrounding environment. ## What are Krypton filled double glazed windows? Krypton has many of the same properties as Argon but with one notable difference - it's slightly denser, so it can be used to fill panes even if they have been made from thicker materials. This helps to prevent heat transfer during colder months by keeping the warm air within each unit where it belongs. Like Argon, Krypton is almost completely non-reactive and thus extremely secure at preventing leaks from occurring through damage or wear and tear over time. That makes these gases ideal for use in window units because they help to hold units together for longer, cutting down on the need to replace panes that may have become damaged in some way. ## How does double glazing help save on energy bills? Double glazing is a great way to save money on energy costs because it helps prevent heat transfer from occurring at all. That means that you don't have to turn up your central heating system in order to keep warm if you're within a double glazed home. Your air conditioner does not work as hard to cool your interior. ## What are the disadvantages of double glazing? A key disadvantage of choosing double glazed windows is when they are not installed properly. If gaps or air bubbles occur during installation, this allows cold drafts through these areas - reducing the overall thermal performance of your units and preventing them from working effectively at all. Compared to single glazed windows, the cost of a double glazing window is higher. On average, uPVC double glazed windows can cost 10-20% more than single glazing windows. Occasionally they [may collect condensation](/guides/window-tinting/what-causes-condensation-on-double-glazed-windows). The best thing you can do is consult a professional installer who can provide you with an installation service that meets industry regulations and ensures each unit works effectively without any issues or defects. ## Advantages and disadvantages of double glazed windows Having double glazed windows in your home means no more drafty windows. This means that you can save money on heating and cooling costs, keep warm during the colder months, and still enjoy natural light. On top of keeping the house warm, selecting double glazing windows lowers outside noise. You also won't have to worry about kids and pets getting their hands, paws, and claws stuck between panes of glass. Even though they lower power bills, double glazed windows tend to be more expensive than regular ones. If you are running a tight budget, you can consider installing secondary glazing to the existing window to save on cost. They are also harder to install because they require more work when properly fitting both panes together, so they don't allow any drafts through smaller gaps or bubbles. Compared to smart or low e glass, they have a lower solar radiation capability. ## What do window manufacturers mean when they talk about 'U' values? Window manufacturers use U-values to describe how much heat loss occurs in each unit when used. The lower the U-value, the more energy-efficient each window is because it prevents heat transfer from occurring at all. For example, if one window has a U value of 1 and another has a U value of 0.75, the latter will be better at stopping heat transfer despite both panes being identical in terms of thickness and quality. The Australian Window Association provides guidelines on thermal performance and specifications of glass windows and doors. Their tool, tailored to the Australian climate, is useful if you plan to install glass windows and doors to your house. You will get more details from your nearest window supplier or the Australian Government's [Your Home website](https://www.yourhome.gov.au/passive-design/glazing).

How do double glazed windows work?

Double glazing is a method of treating windows for energy efficiency, sealing two panes of glass together with a non-reactive gas inside. In most cases, this gas is harmless and often simply air. However, some double glazed windows may also use other gases such as argon or krypton to fill the space between panes or a Low-E coating may be used on one or both surfaces of the window pane. The purpose of double glazed windows and how double glazed windows work is to reduce heat flow through the window by stopping conduction and convection that results in losing more heat and they have superior thermal and acoustic performance. Conduction takes place when heat passes through different materials at different rates. For example, a window has a very low rate of conductivity compared to other materials. The heat flow through windows is mainly carried out by radiation and convection due to the difference in temperatures between inside and outside. Double glazing reduces the rate of conduction, trapping internal heat within a room (increasing thermal insulation). The low conductivity levels of the second pane of glass further reduce heat loss via convection by producing an insulating dead air space without any holes or gaps. The surface coating then reduces radiative heat loss by reflecting infrared energy back into the room. Some double glazed windows contain a low-emissivity coating on one or both surfaces of their window panes. This coating is designed to reflect infrared radiation back into the room, thereby reducing heat loss. The level of insulation provided by double glazing is much higher than that of standard single glazing and can reduce your heating bills up to 30%. The double glazing reduce noise inside the homes too. On average, it takes around twice as much energy to heat a home compared to keeping it cool in single glazed windows. It therefore makes sense to invest in high-quality windows with excellent insulation ratings and energy efficiency, particularly if you live in an older house with less than perfect levels of insulation. However, it should be remembered that any type of window will only be effective at preventing heat loss even if it is a double glazing unit, if its seals are maintained in good condition during double glazing work. ## How effective is double glazing? There is a four-point scale that measures how effective double glazed windows are. The lower the number, the better the performance of the double glazing works in double glazed units. The U-value for a window is determined by multiplying its R-value by its area and dividing this by the overall heat loss of the dwelling which takes into account heat from people, appliances, and lighting. In other words, it's a measure of how much heat will pass through its glass, frame, and any low-emissivity coatings. Double glazing in a double glazed unit with an R-value of three reduces your home's energy use by around 40%. A standard single pane has a U-value of 5.1 while some double glazing units have a U-value as low as 1.1. ## How does double glazing work? The two layers of glass are known as panes, which are separated by an air gap, are filled with non-reactive gas to reduce heat flow through conduction making them energy efficient in double glazed units. A low-emissivity coating may be applied to one or both surfaces of the window pane to reflect infrared energy back into the room reducing heat loss. This is how double glazing works. Tightly packed argon or krypton is used as it's an effective insulator and doesn't cause any problems with trapped moisture leading to condensation inside the glass. The design of the frame is also important in keeping your home warm. Frames should be deep or, even better, filled with insulation. ## What is a U-value in windows? A U-value is a way of measuring the heat lost through the glass, frame and any low-emissivity coatings in the air gap. It is measured in watts per square metre per degree kelvin (W/m²K). The lower the number, the more effective it will be at keeping energy costs down. A twice glazed window with an R-value of 3 has a U value of 1.1, while standard single glazing has a rating of 5.1, like the upvc double glazed windows. ## What are the disadvantages of double glazed windows? Double glazing is not without its problems apart from being energy efficient. The most common issue is condensation forming between the panes, which can be a health hazard for people with breathing difficulties. To reduce this, it's important to have an effective seal around the window which double glazing refers to and to regularly check that it's clean inside and out. Condensation can also form when there is a temperature difference between one of the sides of glass in the insulated glass unit and the surrounding air, or when warm moist air comes into contact with cold glass or plastic surfaces. If your double glazed windows are fitted poorly, they may be more likely to suffer from rattling in high winds. If you live in an area where there are strong winds, make sure your windows are well-sealed and fitted with security locks to avoid the seal being broken in double or triple glazing lowering energy costs and providing noise reduction. ## How do double glazed windows keep heat in? The main reason for double glazing to keep heat in the home is due to the secondary pane of glass. In effect, it acts as a barrier between your warm house and an open window. The air that fills this cavity is completely still and acts as insulation and gives noise reduction too. Other reasons include: - Low emissivity coatings in low e glass on one or both glass surfaces reduce loss of internal heat energy by radiation from the glass panes to cooler surrounds. - Deep frame members provide enhanced low emissivity areas which minimise the conductive transfer of heat through conduction. - Close-fitting frames with high edge contact to minimise the convective flow of cold air around the outer surface of the glazing unit in heat transfer that prevents heat loss. ## How thick is double glazed glass? A double-pane window in low e glass is formed of two pieces of glass separated by an air space which provides excellent insulation against the transfer of heat and gives an acoustic performance. Double-pane windows in a sealed unit usually cost more than single-paned ones, but it's important to be aware that they may not always offer significant energy savings in sealed units. The thicker the glazing of the two panes, the better its insulating qualities will be with warm air in the two panes of glass and seal noise pollution. Double glazing helps with a large piece of thick glass providing a lot more resistance to heat loss than two small panes with the same R-value (U value). Low emissivity (Low-E) coatings are applied to one or both surfaces of the window pane to reflect infrared energy back into your home reducing heat. The design and thickness of your window frame also play a part in keeping your home warm. Frame design of the two panes is also important in keeping your home warm and reduce heat transfer in framing material. Frames should be deep or, even better, filled with insulation of thermal energy. If you're interested in getting them, request a free quote from the nearest hardware store. ## Why is argon gas used in windows? Argon gas is used in twice glazed windows as it is an effective insulator in the window system for better thermal transfer and doesn't cause any problems with trapped moisture leading to condensation inside two panes of glass. Argon is a gas that forms no part of the natural atmosphere. Its main uses involve insulating steel tanks, preventing heat from being lost in these vessels and is used for storing liquid propane and oxygen, as well as being a vital component in the production of supersonic aircraft with better thermal performance and sound reduction in a double glazed window. ## What problems can double glazed windows cause? Condensation can also form when there is a temperature difference between one of the panes of glass and the surrounding air in the two panes, or when warm moist air comes into contact with cold glass or plastic surfaces with an optimum air gap from winds. If you live in an area where there are strong winds, make sure your windows are well-sealed with insulating gas and fitted with security locks for security. ## How do double glazed windows save energy? Double glazed windows that provide a level of insulation in summer and winter could cut your energy bills by 30% with a metal or polymer strip. The reason for this is that heating and cooling the house takes up the majority of everyone's energy use with good thermal performance, with appliances like dishwashers and washing machines accounting for just 10% or so. ## How are double glazed windows made? Double glazing is created by sandwiching two pieces of glass together with a layer of inert gas (such as argon or krypton) between them. This works because the gas is an extremely poor conductor, which discourages heat flow across the window. The panes are sealed to prevent moisture from penetrating and reduce condensation, the space between them, and they can be held in place by a rubber gasket around the edge. ## Are double glazed windows worth it? Double glazing is not without its problems as compared to single pane. The most common issue is condensation forming between the panes, which can be a health hazard for people with breathing difficulties. To reduce this, it's important to have an effective seal around the window and to regularly check that it's clean inside and out. Condensation can also form when there is a temperature difference between one of the panes of glass and the surrounding air, or when warm moist air comes into contact with cold glass or plastic surfaces. ## How does double glazing work? Double glazed windows are better than single-paned ones at keeping the heat in your house during winter because more energy is required to heat up two layers of glass than just one. This means less heat escapes and is kept inside with you and your family. This effect also works the other way around: double glazing will be cooler in summer than a single-paned window because it takes longer for unwanted heat to enter the room. Double glazed windows are not without their problems. The most common issue is condensation forming between the panes, which can be a health hazard for people with breathing difficulties. To reduce this, it's important to have an effective seal around the window and to regularly check that it's clean inside and out. Condensation from the water vapour effect can also form when there is a temperature difference between one of the panes of glass and the surrounding air in the outside pane or when warm moist air comes into contact with cold glass or plastic surfaces t

Why are Double Glazed Windows Good Insulators DUPE

Double glazed units are good insulators because they have an air space between two or more panes of glass. A still layer of gas and a spacer made of a metal or polymer strip usually with a drying agent are used to separate the glass panes. This extra pane prevents heat from passing through the window, making them highly effective insulated glass units with great thermal performance. In cold climates, double glazing is really important for your home's overall energy efficiency and can dramatically reduce heating costs during the winter months. In hotter climates, it works as a barrier against the sun's rays so you won't be paying extra to cool a room that has been overheated by direct sunlight. The amount of double glazing which should be installed in homes varies depending on the local climate but generally, homeowners looking for energy efficient houses would benefit from having at least two layers of glass in each window. Triple glazing is popular, but in some climates, it might be more effective to have four or six layers in each window. The best thing about double glazing is that it can be fitted into an existing uPVC window frame, making it easy for homeowners to stay within budget and make the most of energy-saving technology without having to replace all the windows in their home. ## Why are double glazed windows efficient thermal insulators? Double glazing is highly effective at thermal insulation. This means that the trapped air between the two panes of glass prevents heat loss from inside your house, and saves you money on heating and power bill. It also prevents your windows from condensation when inner temperatures are warmer than outside. The air gap between two sheets of glass prevents heat from passing through the window. In cold climates, double glazing is really important for your home's overall energy efficiency and can dramatically reduce heat loss resulting in decreased heating costs during the winter months. In hotter climates, the increase in thermal performance it works as a barrier against the heat and direct sunlight from entering your house while preventing heat gain keeping your house cool so you won't be paying extra to cool a room that has been overheated by the sunlight. It's important to note that the insulating efficiency of these windows depend on a number of factors including: the glass thickness, glass types, which gas is filled in the air space between two panes, low e glass and whether the glass is fully sealed or not. ## How long do double glazed windows last? A double glazed window will typically last for between 20-30 years, depending on the quality of materials used in its construction. If you are looking to improve your home's energy efficiency but are concerned about the exterior aesthetics of your windows over time, then installing double glazing is a wonderful idea. ## Which is a better-insulated window, single glazed windows or double glazed windows? Depending on the climate you live in, there are lots of factors that will affect whether you should have a single pane or double glazing installed. In cold climates, double glazing is really important for your home to be energy efficient and can dramatically reduce heating costs during the winter months. In hotter climates, it works as a barrier against the heat and sun's rays so you won't be paying extra to cool a room that has been overheated by the sunlight. However, it comes with the added benefit of not blocking out radiant heat. This let's warm and fresh light enter your house during all seasons. If you are looking to improve your home's energy efficiency but are concerned about the exterior aesthetics of your windows over time, then installing double glazing is a wonderful idea. This type of product is not only more energy-efficient, but also more cost-effective for homeowners who do not wish to upgrade their entire window frame. ## What insulation is used in double glazed windows? Double glazing is an insulator because it has an air space filled with gas between two panes of glass. This air space prevents heat from passing through the window, saving homeowners money on yearly energy bills. Quartz glass is becoming increasingly popular in thermal window construction because it has unbeatable [thermal insulation properties.](/guides/aluminium-windows/why-are-double-glazed-windows-energy-efficient) The inert gas contained inside this type of glass can help to improve its overall insulation performance by nearly 4%. Another popular glass is the low e glass which can help alter the light transmission capacity of a window when heat, light or voltage is applied to it. Double glazing units are made up of two panes of glass separated by a sealed air gap chamber, which makes them excellent insulators against both forms of heat transfer (conduction and convection). ## What gas is used in double glazed windows? Double glazed windows get their insulating power from the air or gas inside the sealed cavity between the two panes of glass. This gas is usually argon, krypton or xenon. Argon and Krypton are inert gasses, which means that they do not react with other compounds around them; this makes them perfect for regulating the pressure in double glazed window units. ## What does uPVC mean? uPVC stands for Unplasticized Poly Vinyl Chloride - a type of thermoplastic polymer resin which has become one of the most popular types of window (and door) frame material other than aluminium frames to be installed in homes because it is durable, cost-effective and aesthetically pleasing . Many uPVC window manufacturers offer double glazing made from this material, but make sure you ask them what type of gas they fill the cavity with; argon and krypton are more energy efficient than air. ## Do double glazed windows reduce household energy costs? A double glazing window system will typically reduce the amount of heat energy needed to cool up your house by between 8 and 15 percent by blocking out unwanted heat gain while maintaining your home to a comfortable temperature. This can help you make significant savings on air conditioner costs. By installing double glazing units in your home, you can save up to 20% on energy costs during the winter months and keep cold air inside when temperatures rise outside due to its better thermal performance. Also, double glazing works to [help prevent condensation](/guides/window-tinting/what-causes-condensation-on-double-glazed-windows) from forming on the panes of glass inside a room so you don't have to worry about water droplets from the air obscuring your view or window frames rotting away from the condensation caused due to the excess moisture trapped next to them. ## How long does it take to install double glazed windows? Typically, a team of professional window installers can finish the job from start to finish within a day if everything has been pre-ordered correctly and there are no obstacles in their way. If you have just bought a new home but still have single glazing installed, then it might be best for someone to return once all your double glazed units have been delivered so they can get started right away. The Australian Government's [Your Home website](https://www.yourhome.gov.au/passive-design/glazing) also has a handy guide to glazing. ## Do double glazed windows reduce outside noise? Yes - an excellent example of this is when you look at how much more insulated car windshields are compared to the windows in your home. A soundproof double glazed unit can help reduce high-frequency noise up to 10dB. Noise pollution has been proven time and time again to have a negative effect on people's sleep patterns and general well-being, but double glazing can help to alleviate this problem for homeowners who live in neighbourhoods that are regularly subjected to loud noises from traffic or industrial machinery by providing maximum noise reduction. In addition, double glazing often come with special coatings that prevent rain from getting through them while still allowing light rays from the sun inside - these coatings will do a lot to ensure good visibility without any distracting reflections from the outside world.

Aluminium Windows Informational Articles

Why are Double Glazed Windows Good Insulators?

Double glazed units are good insulators because they have an air space between two or more panes of glass. A still layer of gas and a spacer made of a metal or polymer strip usually with a drying agent are used to separate the glass panes. This extra pane prevents heat from passing through the window, making them highly effective insulated glass units with great thermal performance. In cold climates, double glazing is really important for your home's overall energy efficiency and can dramatically reduce heating costs during the winter months. In hotter climates, it works as a barrier against the sun's rays so you won't be paying extra to cool a room that has been overheated by direct sunlight. The amount of double glazing which should be installed in homes varies depending on the local climate but generally, homeowners looking for [energy efficient houses](/guides/aluminium-windows/why-are-double-glazed-windows-energy-efficient) would benefit from having at least two layers of glass in each window. Triple glazing is popular, but in some climates, it might be more effective to have four or six layers in each window. The best thing about double glazing is that it can be fitted into an existing uPVC window frame, making it easy for homeowners to stay within budget and make the most of energy-saving technology without having to replace all the windows in their home. ## Why are double glazed windows efficient thermal insulators? Double glazing is highly effective at thermal insulation. This means that the trapped air between the two panes of glass prevents heat loss from inside your house, and saves you money on heating and power bill. It also prevents your windows from condensation when inner temperatures are warmer than outside. The air gap between two sheets of glass prevents heat from passing through the window. In cold climates, double glazing is really important for your home's overall energy efficiency and can dramatically reduce heat loss resulting in decreased heating costs during the winter months. In hotter climates, the increase in thermal performance it works as a barrier against the heat and direct sunlight from entering your house while preventing heat gain keeping your house cool so you won't be paying extra to cool a room that has been overheated by the sunlight. It's important to note that the [insulating efficiency](/guides/aluminium-windows/why-are-double-glazed-windows-good-insulators) of these windows depend on a number of factors including: the glass thickness, glass types, which gas is filled in the air space between two panes, low e glass and whether the glass is fully sealed or not. ## How long do double glazed windows last? A double glazed window will typically last for between 20-30 years, depending on the quality of materials used in its construction. If you are looking to improve your home's energy efficiency but are concerned about the exterior aesthetics of your windows over time, then installing double glazing is a wonderful idea. ## Which is a better-insulated window, single glazed windows or double glazed windows? Depending on the climate you live in, there are lots of factors that will affect whether you should have a single pane or double glazing installed. In cold climates, double glazing is really important for your home to be energy efficient and can dramatically reduce heating costs during the winter months. In hotter climates, it works as a barrier against the heat and sun's rays so you won't be paying extra to cool a room that has been overheated by the sunlight. However, it comes with the added benefit of not blocking out radiant heat. This let's warm and fresh light enter your house during all seasons. If you are looking to improve your home's energy efficiency but are concerned about the exterior aesthetics of your windows over time, then installing double glazing is a wonderful idea. This type of product is not only more energy efficient but also more cost-effective for homeowners who do not wish to upgrade their entire window frame. ## What insulation is used in double glazed windows? Double glazing is an insulator because it has an air space filled with gas between two panes of glass. This air space prevents heat from passing through the window, saving homeowners money on yearly energy bills. Quartz glass is becoming increasingly popular in thermal window construction because it has unbeatable thermal insulation properties. The inert gas contained inside this type of glass can help to improve its overall insulation performance by nearly 4%. Another popular glass is the low e glass which can help alter the light transmission capacity of a window when heat, light or voltage is applied to it. Double glazing units are made up of two panes of glass separated by a sealed air gap chamber, which makes them excellent insulators against both forms of heat transfer (conduction and convection). ## What gas is used in double glazed windows? Double glazed windows get their insulating power from the air or gas inside the sealed cavity between the two panes of glass. This gas is usually argon, krypton or xenon. Argon and Krypton are inert gasses, which means that they do not react with other compounds around them; this makes them perfect for regulating the pressure in double glazed window units. ## What does uPVC mean? uPVC stands for Unplasticized Poly Vinyl Chloride - a type of thermoplastic polymer resin which has become one of the most popular types of window (and door) frame material other than aluminium frames to be installed in homes across Great Britain because it is durable , cost-effective and aesthetically pleasing . Many uPVC window manufacturers offer double glazing made from this material, but make sure you ask them what type of gas they fill the cavity with; argon and krypton are more energy efficient than air. ## Do double glazed windows reduce household energy costs? A double glazing window system will typically reduce the amount of heat energy needed to cool up your house by between 8 and 15 percent by blocking out unwanted heat gain while maintaining your home to a comfortable temperature. This can help you make significant savings on air conditioner costs. By installing double glazing units in your home, you can save up to 20% on energy costs during the winter months and keep cold air inside when temperatures rise outside due to its better thermal performance. Also, double glazing works to help prevent condensation from forming on the panes of glass inside a room so you don't have to worry about water droplets from the air obscuring your view or window frames rotting away from the condensation caused due to the excess moisture trapped next to them. The Australian Government's Your Home website has some great [information on glazing](https://www.yourhome.gov.au/passive-design/glazing). ## How long does it take to install double glazed windows? Typically, a team of professional window installers can finish the job from start to finish within a day if everything has been pre-ordered correctly and there are no obstacles in their way. If you have just bought a new home but still have single glazing installed, then it might be best for someone to return once all your double glazed units have been delivered so they can get started right away. ## Do double glazed windows reduce outside noise? Yes - an excellent example of this is when you look at how much more insulated car windshields are compared to the windows in your home. A soundproof [double glazed unit](/guides/aluminium-windows/what-do-double-glazed-windows-do) can help reduce high-frequency noise up to 10dB. Noise pollution has been proven time and time again to have a negative effect on people's sleep patterns and general well-being, but double glazing can help to alleviate this problem for homeowners who live in neighbourhoods that are regularly subjected to loud noises from traffic or industrial machinery by providing maximum noise reduction. In addition, double glazing often come with special coatings that prevent rain from getting through them while still allowing light rays from the sun inside - these coatings will do a lot to ensure good visibility without any distracting reflections from the outside world.

Frequently Asked Questions

Why are compliant windows important?

Compliant windows meet minimum safety and bushfire compliancy and can avoid having to replace them in the near future for not meeting standards.

What’s the difference between aluminium, wood and uPVC windows?

Wood is the most traditional window style, while aluminium is normally the thinnest and most adaptable, and uPVC are more energy efficient.

Should I have my windows powder coated or anodised?

It’s best to discuss with your window professional as it does depend on surrounding fixtures, the desired look and how long you want it to last.

Can I get aluminium windows in any colour?

Yes, most business will have a range of colours to customise your window design.

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