Everest Windows & Home Improvement Review 2026

About Everest

Everest Home Improvement has been a mainstay of the UK double glazing market since its foundation in 1965. While initially focused on double glazing, the company expanded to offer a wide range of home improvements. Their product offering includes triple glazing, secondary glazing, doors, conservatories, roof extensions, patios, driveways, roofline, flat roofs, garage doors, and even security systems. Today, Everest is one of the largest double glazing suppliers in the UK, with around 3% the total market. To put this into perspective, there are over 3,000 double glazing installers in the country.

Double glazing is a major investment: your provider should meet or exceed your expectations, offering quality windows and backing up their installation with a good warranty and great service.

Review of Everest

Everest offers a combination of high-quality doors and windows, with reasonable costs if you can get a good quote. Everest stands out for their local factories in Kent and Wales, which means that most of their products are manufactured in the UK.  Everest also offers a quality customer service experience, having an in-house customer service team.

However, keep in mind that Everest outsources their sales and installations, which means they cannot offer the same quality control as in their manufacturing process. Generally, installers are sub-contracted locally depending on the deal, while sales representatives are often hired on commission as franchisees. This can result in a mixed experience: while Everest windows and doors are consistently of high quality, the sales experience and installation quality can vary by location.

Pricing – Everest provides general pricing ranges, but detailed information is not available outside of individual surveys. This is in part to keep their competitive edge – and also because double glazing costs change dramatically depending on window type, frame, glass and other installation factors. This means you will need a home survey to get a 100% accurate quote. However, Everest is not a budget double glazing company. They primarily sell mid-range doors and windows, focusing on product quality and a long warranty rather than low initial double glazing installation costs.

Here are the window price ranges published on the official Everest website:

• uPVC window = £600 – £1,800 per window
• Sash window = 50% more than a casement window
• Tilt and turn window = 25% more than a casement window
• Bay window = 150% more than a casement window
• Aluminium frame = 25% more than uPVC
• Timber frame = 50% more than uPVC

Based on this general information, we can put together a table with estimated price ranges. However, keep in mind these are broad estimates and not an accurate reflection of how much you are likely to pay:

Everest Window Type	Estimated Cost
uPVC frame, casement	£600 – £1,800
uPVC frame, sash	£900 – £2,700
uPVC frame, tilt and turn	£750 – £2,250
uPVC frame, bay	£1,500 – £4,500
Aluminium frame, casement	£750 – £2,250
Timber frame, casement	£900 – £2,700

In general, you can expect to pay over £500 per window if you choose Everest, including installation costs. Note that prices can vary significantly depending on the conditions of your home:

• Stories – Replacing windows in multi-story homes is more expensive, compared with single-story homes.
• Frames – Each frame type has its pros and cons, and prices can vary significantly. For example, sash frames can be 2-4 times more expensive casement frames.
• Home condition – If your home needs additional work before a window replacement, your budget will increase accordingly. For example, the project becomes more expensive if the walls around your windows need work.
• Glass – Everest offers seven different types of glass and your choice has an impact on pricing. Triple glazing is more expensive than double glazing, but also more efficient.

There are several factors that affect the price of your double glazing – you should schedule a window inspection to get an accurate quote. You can use our free quote service to compare the top 3 quotes from installers in your area, or you can call to set up a sales meeting with Everest to get a direct quote.

Everest Window Warranty

Everest offers some of best guarantees in the industry, including a 10-year warranty for all window parts and an optional lifetime guarantee against fogging and condensation. This is one of the main advantages offered by Everest, and one of the main reasons to purchase windows from them:

Guarantee	Length
Comprehensive window parts and materials warranty, offered for all products.	10 years
Condensation and fogging guarantee for Essentials uPVC, timber and aluminium range off doors and windows. Includes discolouration guarantee for white uPVC.	10 years
Condensation and fogging guarantee for Exclusives uPVC product range. Includes discolouration guarantee for white uPVC.	20 years
Lifetime condensation and fogging warranty for Exclusives uPVC range, at an additional cost.	Lifetime
Aluminium windows finish and profile discolouration guarantee.	25-year
Timber windows rot and fungus guarantee.	30-year
Timber windows paint and stain finish guarantee.	5-year

Everest offers the best after care and after-sales support on the market, which makes them a great choice if you are worried about the longevity of your windows.

Transferable Warranty – Unlike most of its competitors, Everest offers transferable warranties, which is very helpful if you sell your home during the coverage period. Just keep in mind that the paid lifetime guarantee cannot be transferred, and it changes to a 20-year guarantee if you sell your property. Also note that the transferred 20-year coverage is counted from the installation date, not the home sale date. For example, if you have a lifetime guarantee and sell your home after 12 years, the new owner gets 8-year coverage.

Double Glazing Options

Everest offers many customization options for double glazing, which is one of the main reasons why they don’t publish pricing. Thanks to the multiple design options offered by Everest, you can order your windows exactly how you want them.

Window Design Features	Styles and Options
Materials	3 – uPVC, Timber, Aluminium
Frames	5 – Casement, Flush Casement, Sash, Tilt and Turn, Bay
Opening Styles	30 opening styles
Glazing	3 – Double, Triple & Secondary
Colours	25 Colour Options
Glass Finish	7 – Obscure, Decorative, Security, Safety, Noise-Reducing, Self-Cleaning, & Anti-Sun

Everest claims you can customise their windows in 787,000 different ways by combining the different options. Everest allows a high degree of customization for their windows and they can manufacture the exact design you want to install.

What Certifications Does Everest Have?

Everest Home Improvement offers top-quality doors and windows, and all their products meet or exceed industry standards. Everest holds the following memberships and certifications:

• Glass & Glazing Foundation (GGF)
• British Board of Agrément (BBA)
• British Standards Institute (BBI)
• Secured by Design
• TrustMark
• BFRC
• Fenestration Self-Assessment Scheme (FENSA)
• Chartered Trading Standards Institute (CTSI)
• The Glazing Arbitration Scheme (TGAS)
• Conservatory Association
• Interlay
• Institute of Customer Service

Everest also manufactures most of their products right in the UK. This allows them to maintain high production standards, high quality, and high standards of living for employees. As you might expect, being made in the UK also reflects in the cost of their windows.

How To Negotiate with Everest Sales Representatives?

Everest has a bad reputation for their sales team, which often uses high-pressure tactics to close sales faster. Everest typically pays their sales teams based on their revenue, which means that salespeople will often try to sell windows at higher prices. You should go into the sales meeting prepared to negotiate a good deal, without settling for an inflated price.

Know What You Want – In most cases, your salesperson will try to upsell the most expensive window options they have. If you want to get a good deal, it’s important to know what you want – this includes window material, frame, and glass type. Get familiarised with standard industry prices and be prepared to tell the salesperson what you expect to pay if they quote too high.

Don’t Sign Same-Day Deals – Everest salespeople have been known to reduce the price of a quote as much as 45% in one sitting, but this often isn’t a deal. Instead, they will quote a vastly inflated price and lower it over the course of the meeting, to make you think you’re getting a good deal. In reality, you’re likely still paying more than you should. UK law ensures that you have two weeks to accept any quote, which means that ‘today-only’ prices are a scam.

Come Prepared – It can be very helpful to go into a sales meeting with existing quotes from other companies. This shows that you mean business, are ready to install, and you know what you will pay for your double glazing elsewhere. Everest does not offer any price matching offers, but you can use this to convince your salesperson to lower costs as much as possible.

Everest is the second-largest double glazing company in the UK. They offers industry-leading guarantees, made-in-the-UK glazing, and quality after-service. However, you should be aware that installation is sub-contracted out, and its quality is not controlled directly by Everest. Also, salespersons will often try to overprice Everest products rather than giving you a fair quote.

If you can get a good quote, Everest is one of the best companies to choose for double glazing installation.

Getting a great deal on double glazing means learning about window costs and comparing quotes from multiple companies. If you’re ready to install double glazing, you can use our free tool to find and compare quotes from the top 3 installers in your area. You can also check here if there are any double glazing grants available in your area.