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Made In Britain
Triple glazing has three panes of glass held together in a glazing unit with two insulating air gaps that slow down the thermal transfer of cold or heat through the unit. The deeper the unit, the more insulating the glazed unit is. Standard double glazed units have a unit depth of 28mm, whilst Everest triple glazing is a substantial 44mm deep.
Everest triple glazing is one of the highest performing glazing units on the market with an industry-leading 0.80 U-value making it ultra energy efficient. Choosing energy-efficient Everest windows can help lower your energy bills and reduce your carbon footprint.
We only use the best components to make superior quality windows and pay attention to all the details of our frames. Market-leading corner welds, a PCE gasket with a superior weather tight seal, an extreme multi-point locking system with powerbrace keeps for enhanced security and a trickle vent which has noticable noise reduction on previous vents.
Choose from uPVC window frames, wooden windows and aluminium windows. We also offer a variety of designs, including our most popular casement window frame, Tilt and Turn and bay windows. Everest triple glazing is available in a wide range of options suitable for all types of houses such as modern, traditional and period properties.
Our most popular window with excellent performance and versatility.
Opens inwards for easy cleaning and tilts for secure ventilation.
Create a sense of space with panoramic views and more sunlight.
With the introduction of our new window range, we are offering superior energy efficiency, market-leading U-values and a drive towards sustainability that has not been widely available in the UK.
As the Future Homes Standards are introduced, the energy efficiency of a home and U-values for windows will become more important. At Everest, we believe that triple glazed windows will become a requirement in all new build houses as the standards for the fabric structure of buildings keep increasing.
Everest uPVC triple glazed windows and double glazing windows have a low U-value with triple glazing achieving a market-leading 0.8. The frame is made with recycled uPVC and most of the window can be recycled to reduce the impact on the environment.
By choosing Everest windows now, we will help you to future-proof your home with the best products for energy efficiency and the environment:
Low U Value
Low U Value with security
Best for energy efficiency
Energy efficiency with security
The outer pane reduces solar heat gain and provides high insulation, this combined with the centre pane and Low E inner pane reflects heat back into the room.
U Value (No Georgian Bars): 0.8
G Value: 0.19
Window Energy Rating: C
Outer Pane: 4mm Toughened SKN176
Centre Pane: 4mm Toughened Clear
Inner Pane: 4mm PlaniTherm One
Decorative Glazing Options
Georgian Bars: Internal or External
Obscure Glass: Not available
Leaded Glass: Not available
The outer pane reduces solar heat gain and provides high insulation, the inner pane has a security laminate for added security.
U Value (No Georgian Bars): 1.18
G Value: 0.22
Window Energy Rating: E
Inner Pane: 6.8mm Laminated
The outer pane allows solar heat in while the centre and inner panes both reflect heat back into the room.
U Value (No Georgian Bars): 0.99
G Value: 0.40
Window Energy Rating: A++
Outer Pane: 4mm Low Iron
Centre Pane: 4mm Toughened Low E
Inner Pane: 4mm Low E
Obscure Glass: Optional
Leaded Glass: Optional
The outer pane allows solar heat in and has a security laminate, the centre and inner panes reflect heat back in.
U Value (No Georgian Bars): 1.04
G Value: 0.36
Window Energy Rating: A
Outer Pane: 6.8mm Laminated
Based on U-values, Everest energy efficient triple glazing is three times more energy efficient than old double glazing and just over one-and-a-half times more efficient than Everest energy saving double glazing.
The difference between double and triple glazing
With thousands of options to choose from, Everest windows are designed to meet your needs.
Over 20 stunning colours including woodgrain finishes on uPVC which look like real timber.
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Customise your windows with a choice of glass and glazing, including obscure, decorative, noise-reducing, double glazing or triple glazing.
View Glass Options
Our window handles and furniture are available in a choice of colours, so you can create the perfect look for your property.
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Many people mistakenly think that triple glazing is more soundproof than double glazing because there are three panes of glass. This is incorrect, as to reduce the transmission of soundwaves a combined approach of disruption and reduced transference is necessary.
If noise pollution is important for you we recommend our Double Glazing noise reduction windows.
Read more: How to soundproof windows...
Triple glazing lasts for around 20 years but does vary depending on the quality of the window units and the quality of the installation.
Of course, windows can last far longer than their predicted lifetime and many houses have windows that are over thirty years old - if they've been well-maintained.
It also depends on where the windows are positioned in a property. For example, a south-facing window that gets a lot of sun or a coastal facing property will have a shorter lifespan due to excessive weathering.
Everest triple glazing is five times as efficient as old double glazing and only costs 10-20% more than new double glazed windows.
The superior efficiency of triple glazing can help to create a house that reduces carbon emissions and uses less energy to heat.
Triple glazing also creates more comfort in your home with less cold spots next to windows.
Ultimately, it’s a personal choice based on your own requirements. But, as U-values become more important for homes and can contribute to better EPC ratings, triple glazing is becoming more popular in the UK.
When buying new windows there are a variety of options that make a difference to how much your new triple glazing windows will cost.
Comparing prices from different suppliers needs to be on a like-for-like comparison of quotes. At Everest, our prices include everything from the window, all furniture and fittings, installation to waste removal and recycling of your old windows.
Everest triple glazing costs 10-20% more than double glazing.
The average price for triple glazing windows is anything between £660 to £4,320 per window, depending on the different options, such as bay windows are 150% more than casement window frames.
There are several common misconceptions about triple glazing that have been perceived as 'disadvantages'. However, all the raised 'cons' are just misconceptions.
The reality is that triple glazing is a superior product in comparison to single and double glazed windows, especially for energy efficiency, and there are no disadvantages.
Read more: The disadvantages of triple glazing...
At Everest we offer a beautiful range of colours and natural woodgrain finishes, so there is a perfect colour to suit every property. Colours range from the traditional white uPVC finish, through to Chartwell Green and ultra-contemporary anthracite grey or black. Add a modern twist to your windows, with dual colours, complementing the inside and outside of your home.
Read more: Everest window colours...
Not all glass is the same. Glass comes in varying thicknesses, clarity levels and coatings and there are several types of glass you can choose for your windows and doors depending on the needs and problems in your home. Whether it's energy efficiency, reducing external noise or protecting furniture from UV damage we have the right glass to solve the problem.
Read more: Glass options for windows...
Make your home warmer and save money on your energy bills with a FREE upgrade to Triple Glazing.
When you choose Everest, not only do you make your home warmer and reduce your energy bills, but you also reduce your CO₂ emissions by consuming less energy to heat your home. We strive for an environmentally friendly manufacturing process and our new windows can be recycled at end of life to reduce the impact on the environment. We are committed to superior energy efficiency, market-leading U-values and a drive towards sustainability that has not been widely-available in the UK.
We source the best components and pay attention to the details that make the difference. Our window frames have almost invisible corner welds and superior weather tight seals. An extreme multi-point locking system for enhanced security that meets PAS 24:2022 and Secured By Design standards. And a trickle vent which has been acoustically tested to show an improvement of noise reduction from our previous vent.
5 out of 5 on TrustPilot
I'm so impressed with how warm the house is now in the winter with the triple glazing, there is a definite difference from before. Mr G, Lincolnshire
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When replacing windows, always choose a style and material that is in keeping with the architectural style and age of your house. Read our buying guides that will help you to choose the right windows for your home.
Discover the benefits of installing triple glazing and whether it's better than double glazing.
We carried out an experiment to demonstrate which type of glazing is better.
Choose windows based on the age and architectural style of your house.
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Made in Britain is an initiative set up to highlight the importance of products being manufactured in Britain.
Certified to ISO 9001, the most recognised quality management standard from The British Standards Institute.
Quiet Mark encourages companies to prioritise noise reduction and find solutions.
Secured by Design is a UK police initiative promoting products that help reduce crime.
FENSA have accredited Everest's installation of replacement windows, doors and rooflights in existing dwellings.
The BFRC is the premier UK authority for independently verified ratings of energy efficient windows and doors.