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Jump to: Fast facts | Key features | Upsides and downsides | How do Everest windows work? | Competitor comparison | Cost | Maintenance | Expert opinions | Customer reviews | Our recommendation | Methodology
Everest is a market leader in the double glazing windows industry, operating across the UK with the exception of Northern Ireland. Founded in 1965, Everest’s contributions to window technologies from introducing secondary glazing to UK homeowners to its latest A++ energy-rated triple-glazed unit, have made it a widely recognised brand.
Everest offers a variety of double glazing options and can also manufacture bespoke windows based on your unique specifications. Here is a breakdown of Everest’s product offerings:
| Casement | Sliding sash | Tilt & turn Secondary Glazing | |
|---|---|---|---|
|
Materials |
uPVC, wood, aluminium |
uPVC and wood |
uPVC |
|
Frame colour options |
27 colours with dual colour option Wood grain finish available |
17 colours with dual colour option Wood grain finish available |
Five colours with dual options |
|
Energy rating |
A+ (double) A++ (triple) |
A |
B double-glazed A triple-glazed |
|
Suitable for |
Highest sound and energy insulation |
Retaining classic window style of period properties |
Secure ventilation (tilt opening) and easier cleaning (turn opening) |
|
Optional glass types |
Obscure, decorative, noise reducing, toughened, security laminated, leaded, Georgian bars |
Obscure, decorative, toughened, security laminated, leaded, Georgian bars |
Obscure, decorative, noise reducing, toughened, security laminated, leaded, Georgian bars |
Everest also offers solutions for bay and bow windows, with each of the styles—casement, sliding sash, and tilt and turn—available for installation.
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Fast facts about Everest double glazing windows
- Noise reduction: Starting at 33 dB with standard double glazing. Up to 40 dB with noise-reducing glass.
- Solar factor (G value): 0.41. This feature is measured on a scale of 0 to 1, with a higher number indicating that your window is better at capturing the sun’s heat energy.
- Thermal transmittance (U value): 1.0. This measures heat loss. The lower the value, the better the window is at keeping your home warm.
- Air leakage (L value): 0.00. Air leakage factor measures the window for airtightness. It should be zero to ensure less draught.
- Energy rating: B, A, or A+ (double-glazed), or A++ (triple-glazed), as rated by the British Fenestration Rating Council (BFRC). The Window Energy Rating (WER) scheme measures the energy efficiency and ranks it from E to A++.
Key features
- Cost: From £500 to £3,200.
- Guarantees: Windows come with a standard 10-year guarantee. The uPVC Exclusives range comes backed by a 20-year guarantee. You can purchase a lifetime guarantee for ultimate peace of mind.
- Security: Everest windows are certified by Secured by Design (SBD). This means they help reduce the risk of break-ins. It is the only type of police certification for products in the UK and is based on rigorous testing standards.
- Made in Britain: Manufactured in the UK.
- Fensa certified: The Fenestration Self Assessment Scheme (FENSA) is the scheme for installers trusted by local authorities, industry, and government. As a registered firm, Everest installations fully comply with the latest building regulations.
Upsides and downsides of Everest double glazing windows
Review highlights of why Everest may or may not be the right choice for your home:
| Upsides | Downsides |
|---|---|
|
Up to A+ energy-efficiency rating means greater savings on energy bills |
Installation can be expensive compared to competitors |
|
High noise reduction |
The cost of additional options and extras can add up quickly |
|
Industry-leading guarantee periods |
Limited financing options |
|
Added security with the GrabLock feature |
How do Everest double glazing windows work?
Everest’s quotation process is relatively streamlined, but certain customers have criticised the sales team for being pushy and trying to upsell expensive solutions. However, there are some steps you can take to get a good quote:
| Window type | How long they last | Everest guarantee |
|---|---|---|
|
uPVC windows |
20-25 years |
10 years (or 20 years on uPVC Exclusives range) |
|
Aluminium windows |
45 years |
10 years for fog and condensation 25 years for the profile |
|
Timber windows |
50 years |
10 years for fog and condensation 30 years against rot of the profile 5 years for paint and stain finish |
Everest double glazing windows versus competitors
We compared Everest with a number of its well-known competitors, and found that while its prices were considerably higher, it performed well in terms of customer satisfaction, guarantee period, and energy ratings.
| Company | Price | Guarantee | Energy rating | Trustpilot score |
|---|---|---|---|---|
|
Everest |
From £500 to £2,460 per window |
10-year guarantee on all window products, except for condensation/fog and discoloration on Exclusive uPVC Casement and Tilt & Turn, which benefit from 20 years. A lifetime guarantee is available at an extra charge. |
A+ double-glazed A++ triple-glazed |
4.3/5 |
|
Anglian Home Improvements |
From £250 to £910 per window |
10-year guarantee on parts and labour, 15-year guarantee on gas-filled units |
A++ on uPVC windows |
3.8/5 |
|
Safestyle |
From £250 to £1,050 per window |
10-year standard guarantee (excluding handles) |
A |
4.1/5 |
|
Britelite |
From £160 to £1,050 per window |
10-year transferable guarantee |
A+ double-glazed A++ triple-glazed |
4.1/5 |
How much do Everest double glazing windows cost?
Everest’s double glazing windows aren’t priced as low as its competitors, but where it stands out is its guarantees. Here are the estimated average costs based on style, colour, and frame material.
| Window style | Average price per window |
|---|---|
|
Casement |
£500 to £1,230 |
|
Sliding sash |
£750 to £1,845 |
|
Tilt and turn |
£625 to £1,450 |
|
Bay |
£1,000 to £2,460 |
Be aware that frame materials and colours can also impact the price. For example, for standard casement windows, grey uPVC costs 10% more than white uPVC, while wood grain uPVC costs 20% more. In addition, aluminium frames will be approximately 25% more expensive than uPVC frames, and wood frames 50% more expensive.
The total price of your new windows with Everest will vary based on:
- Frame style, size, and material
- Layers of glazing (double or triple)
- Number of windows
- The need for scaffolding
- Building permits and permissions
- Installation costs
Everest has partnered with Kandoo, a regulated credit broker and comparison service, to offer personal loans and secured lending options ranging from £1,000 to £250,000, with flexible lending periods of up to 25 years.
Maintaining Everest double glazing windows
Everest boasts that its windows require minimal care. Still, maintenance will vary based on the window type. For all double-glazed windows, the company recommends cleaning at least twice a year to prevent them from being tarnished by pollution and the weather.
With uPVC and aluminium windows, you can simply use a soft cloth, warm water, and washing up liquid. Timber windows can be cleaned in the same way, but they do require more maintenance. You should check wooden frames annually for scratches or chips, and if necessary, recoat them with microporous stain or paint. Be sure to consult Everest before doing any repair work, as it may affect your guarantee.
Condensation is a significant concern for homeowners, but keeping your home well ventilated and using extractor fans or dehumidifiers can resolve most cases. Contact Everest if the problem persists, as your window’s seal could be blown. In most cases, Everest will accommodate repairs or replacement if the product is under guarantee.
What the experts say
Here’s what the professionals say about Everest:
“Everest is the best option for cautious buyers that prioritise quality and peace of mind over everything else (including price).”—Federation of Master Builders
“Everest is one of the best double glazing installers in the UK—it was one of the first double glazing companies in the UK and the first mass-market seller of triple glazing. If you’re considering double glazing, they are probably one of your top installer options.”—Expertsure.com
“Everest is a well-known nationwide installer that has a decent reputation. We recommend getting a quote from them to compare against other installers. While Everest is unlikely to be the cheapest option, the quality of their products and installation means they offer good value for money.”—The Eco Experts
Customer reviews
With a score of 4.3/5 on Trustpilot (based on 12,048 reviews) and 2.5/5 on Review Centre (based on 1,123 reviews), Everest has received mixed responses, with many customers praising the quality of the unit but also facing issues with the sales and installation teams and after-sales services.
“ The whole process was superb, from the salesperson visiting, advice, quotations, amendments made right through to survey, installation and quality of product. This company has restored my faith in customer service. Well done Everest !
PS: Anglian Windows were awful and I took them no further than quotation; dreadful experience with them.”—J Walker via Trustpilot
“The windows are okay—the after-sales service [is] not so good. Sales, survey, and installation in late 2021 went well. Pleasant, helpful fitter. Windows are okay to look at, but one of the locking handles does not work and the window is not openable. Not a great after sales service. I have more windows to replace but will use a different firm next time.”—Lorna Lumsden via Trustpilot
“Make sure you check and double check everything. After paying this company approximately £20,000 for new doors and windows, I discovered I was three restrictors short. I now feel that I was just the payee with no say in my windows and was given what the surveyor thought, which was not what I wanted. In my opinion, save your money and go elsewhere.”—Ellez372 via Review Centre
Our recommendation
Everest offers top-of-the-line, highly accredited windows, although these come at a premium. Don’t hesitate to try to negotiate a lower quote with the sales team, though, in which case Everest is an excellent choice.
Don’t forget to review the work of the local installation team, and you may even want to inspect a few of their recently completed projects before signing up.
How we chose the top double glazing window providers in the UK
We conducted thorough research and compared some of the top-rated windows providers in the UK to help us offer an honest and informative Everest double glazing windows review. We also analysed hundreds of Trustpilot reviews, looked at costs, product efficiency, quality, warranty terms, and expert opinions. This helped us to develop our own opinion of Everest windows.