Did you know that 30% of a building’s heat is lost through its windows in the UK? If you want to make your home more energy efficient this is the first place you should look at.

Although double-glazing can be an expensive option, there are other cost-effective alternatives that you can explore in the market such as secondary glazing.

It’s crucial that your windows are energy efficient and retain as much heat as possible, especially with energy bills higher than they’ve ever been.

Find out about the options that are available to make your windows energy efficient.

What are energy-efficient windows?

Energy-efficient windows minimize the amount of heat loss or gain through the windows, which can help reduce energy consumption and lower utility bills.

The material is made of low thermal conductivity, such as double-pane or triple-pane glass and is coated with special low-emissivity coatings that reflect heat back into the room.

Advantages of energy-efficient windows

Energy-efficient glazing offers a range of advantages, including:

Lower energy bills: Energy-efficient glazing can help reduce heat loss through windows, which means your home will stay warmer in winter and cooler in summer without the need for as much heating or air conditioning. This can lead to lower energy bills and significant savings over time.

Improved indoor air quality: Energy-efficient glazing can help reduce condensation on windows, which can lead to dampness and mould. This can improve indoor air quality and reduce the risk of respiratory problems.

Noise reduction: Energy-efficient glazing can help to reduce noise from outside, making your home a more peaceful and relaxing place to live.

Increased security: Energy-efficient glazing is often made of toughened or laminated glass, which is more difficult to break. This can increase the security of your home and make it harder for intruders to gain entry.

Improved property value: Energy-efficient glazing can improve the energy efficiency rating of your home, which can increase its value and make it more attractive to potential buyers.

What are the U-value and Solar Heat Gain Coefficient (SHGC) of the windows?

The U-value measures how much heat is lost through the window, while the SHGC measures how much solar heat passes through the window. You want a low U-value and a low SHGC for better energy efficiency.

What is the U-value and Solar Heat Gain Coefficient (SHGC) of the windows in secondary glazing?

The U-value and Solar Heat Gain Coefficient (SHGC) of secondary glazing will depend on the type of glass used and the installation method.

Typically, the U-value of secondary glazing ranges from 1.8 to 3.3 W/m²K, which is less energy-efficient than double or triple-glazed windows. However, secondary glazing can still provide significant energy savings compared to single-pane windows.

The SHGC of secondary glazing will also depend on the type of glass used. If low-E glass is used, it can help reduce solar heat gain and increase energy efficiency. However, if the regular glass is used, the SHGC may be high and result in more solar heat gain. It’s important to choose the right type of glass for your climate and location to maximize energy efficiency.

Can secondary glazing make the window energy efficient?

Secondary glazing can make windows more energy-efficient by reducing heat loss and improving thermal insulation. Secondary glazing involves installing a second layer of glazing on the interior side of an existing window, which creates a gap of air between the two panes of glass. This gap of air acts as an insulating barrier, reducing heat transfer and helping to keep the interior of the building warmer in cold weather and cooler in hot weather.

Secondary glazing is a cost-effective way to insulate your windows rather than spending thousand to use double glazing, and you can’t use double glazing in some of the listed houses. This will be a key benefit for the listed properties that want to make their window energy efficient and could take advantage of that

Secondary glazing can also help reduce noise pollution, as the additional glass layer can help block out unwanted noise from outside. This can improve the overall comfort and livability of a building.

While secondary glazing is generally not as energy-efficient as double or triple-glazed windows, it can be a cost-effective solution for improving the energy efficiency of existing windows in Listed buildings. It may also be a good option in situations where replacing the existing windows is not possible or desirable.

Final Say

Overall, energy-efficient windows are an important feature of a well-insulated home and can provide a range of benefits, including lower energy bills, improved comfort, environmental benefits, and increased property value.

Check out Our energy-saving calculator, which will help with how much money our secondary glazing products could save you.

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