Low-emissivity glass, also known as low-E glass, is a microscopically thin metallic coating added to the glazing surface, which lets light through but reflects short-wave infrared radiation. Opt for a different type of glass other than the standard clear glass. To further enhance the performance of your double glazed aluminium windows, you can also add on two other options: Choosing the thermally broken aluminium with clear double glazing moves the R-value up to 0.31.
#Triple glazed windows r value code#
Double glazed aluminium windows are the NZ Building Code minimum requirement for windows and have a R-value of 0.26. Thermal breaks place insulation between the interior and exterior part of the frame and BRANZ testing has shown that frames with this feature can be almost 60% more thermally efficient than regular aluminium frames. Although it is light, strong and low maintenance, aluminium is a poor insulator so if choosing aluminium, it pays to opt for thermal breaks. We’ll start with the most common window option, standard aluminium with clear double glazing. The higher the R-value the higher the performance – less heat will transfer from one side to another. The thermal performance of the glazing and frame is measured with a R-value. Before we begin, it’s important to understand that heat is gained and lost through both the glazing and the frame so when choosing your window option, you need to consider both elements. There are so many different options available now, so to help you get your head in the glazing game, we’ve summarised the most popular options below. So when choosing your windows and doors, it pays to spend time researching what options are available for you and which will suit your home best. In fact, although they may only represent 10% of the surface area of the home, they can account for up to 40% of heat losses if the home is built to little more than the minimum New Zealand Building Code requirements, which so many homes are. According to BRANZ, windows and doors can be responsible for more heat gain or loss than any other element in an insulated home. Unfortunately, even with the minimum requirements detailed in the NZ Building Code, new homes can still experience huge heat loss through the windows. Now as part of our nationwide Building Code, we have a minimum energy performance level that all residential new builds have to meet.
Thankfully, here in Aotearoa we’ve come a long way from the single-glazed windows that were typically installed in new homes. One key aspect of ensuring your home stays warm and dry is installing the most effective windows for your space.
A single pane glass window has an R-value of 1 per inch, a double pane glass window has an R-value of 2 per inch, and a 3 pane glass window has an R-value of 3 which is the same as a double pane window with UV coatings applied.The recent cold snap of weather here in Wanaka has reminded us all of the benefits of building an energy-efficient home that helps retain the heat and stay as warm and healthy as possible. The R-value is simply a measure of the thermal resistance. The R factor is a figure given to the insulation properties of various substances including triple and double glazed windows. You might want to consider using double pane UV coated windows rather than using triple pane windows as they offer the same benefits for a lower cost. This UV coating will prevent heat from entering your home. UV coatings will provide lots of insulation to your home. UV coatings can be applied to both double and triple-glazed windows.
There are also a number of different triple-pane glass windows that have a special UV coating that will prevent as much sunlight from radiating into your house. If you have a very harsh cold winter then you will want to consider triple glazing as an alternative. Whether or not you want to use triple pane windows will depend mainly on your climate. Triple glazing is extremely efficient at insulating your house. The technology behind triple glazed glass units is still quite new, combined with the fact that they are not very common means that the prices are more expensive than you might expect. Triple pane windows are very effective, but they are much heavier and also a lot more expensive than a conventional double glazed unit. Triple pane varieties are more expensive, but do they really offer enough benefits to counter the increased costs? Choosing Triple Pane Windows Double pane windows are fairly inexpensive and offer lots of benefits over the single pane variety.
Triple glazed windows will make your home much more energy-efficient. This structure will prevent heat from escaping from your room by providing better insulation. Then double glazing created the idea of using 2 pieces of gas with an inert gas between. This glass was normally very thin and had minimal thermal insulation. In the past, all windows were made out of a single pane of glass.
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