About Us
Based in Portsmouth, Hampshire, Window Warehouse has grown to become the south coast’s leading manufacturer of quality uPVC and aluminium windows and doors to the domestic and commercial sectors. Although a lot has changed in our 35-years of operation, our business is still set upon our family values and quality. Read more below.
The Beginning
Many of you may not remember clearly what happened in 1986. This was the year the late Diego Maradona knocked England out of the World Cup with the Hand of God, the tragedy in Chernobyl, Top Gun premiered at the cinema, the final stretch of the M25 was opened, and it was the year Window Warehouse opened its doors.
1986 was the year that Window Warehouse was opened by Malcolm Cake. Starting as a manufacturer and supplier of uPVC, we have gone strength-to-strength, offering market-leading products from the likes of Halo, AluK, Palladio, and in the past, LEKA.
Although the industry has changed over the years, we continue to provide our customers with great service, building a reputation for reliability and quality. Building from a small core team, we are happy to have retained colleagues, customers, and friends for more than 20-years, individuals who have become key members in the Window Warehouse community.
Delivering Quality Products
In our time as manufacturers, we have been behind the development of some of the best products on the market. This has included the likes of the Halo Imagine uPVC Bifold Door and several products within the LEKA range. Customers that choose Window Warehouse as their window manufacturer can enjoy uPVC from Halo, with the Rustique and System 10 systems available, boasting an A-C energy rating.
Our aluminium product range is designed using the market-leading AluK profile, one of the very best available. You can also offer your customers composite doors from the likes of Palladio & Solidor, and some of our doors even come with optional Kubu Smart Hardware!
Window Warehouse Today: 2024
Although many of the faces have grown older in the past 35-years, and new ones have joined, we remain dedicated to the family values upon which our business is based.
We are continuing to invest in our company, with our new aluminium factory and four trucks on the road highlighting this. By choosing Window Warehouse as your Window Manufacturer, you can be certain that you’ll be buying from a committed company that isn’t going anywhere.
To read more from Malcolm Cake, Managing Director of Window Warehouse see our Summer 2024 Newsletter here.
Window Warehouse GGF Membership:
Window Warehouse is now a proud member of the Glass & Glazing Federation (GGF). Members of the GGF manufacture and install energy-efficient windows, in homes and commercial buildings and are recognised for their adherence to high levels of quality as outlined by GGF.
The GGF is recognised by government bodies and have subsidiaries, such as FENSA, which are a body which ensure that energy efficient windows and doors installed adhere to current Building legislation. Other branch of GGF would include another familiar name to some, the BFRC (British Fenestration Ratings Council). The BFRC develop Window Energy Ratings that provide much of the industry with the baseline metric of which to base the thermal efficiency of our Windows and doors upon.
It is always highly recommended when looking for a manufacturer, fabricator or supplier of glazing related products that you should first seek out a Glass and Glazing Federation member.
Manufacturing for the Best in the Business
Our History
Independent Installer Network
Since 1996, over 230,000 homeowners have chosen a Network VEKA approved installer to fit their windows, doors or conservatory. Now developed into the Independent Network, Window Warehouse is an Approved Trade Fabricator, supporting installers across the South Coast.

Expert Support and Advice
We value our customer service at Window Warehouse, providing the support you need. Our experts can give you technical and installation advice, offering professional marketing and business support with our exclusive Haven retail brand promoted across Hampshire and the South Coast.

Accredited, Quality Home Improvements
Our windows and doors are manufactured to ISO 9001 : 2015 Quality Assurance and CENSolutions CMS Mark (CMS 6023W): Factory Production Control System compliance to EN 14351-1:2006. All our products also hold the CE Marking certification.

Halo Installer Scheme
Powerful marketing support and exclusive sales leads in your area are two advantages of the free-to-join Halo Approved Installer Scheme. Window Warehouse are proud to be one of the longest standing Halo Trade Fabricator partners.





View Our Inspiration Gallery
Take a look at the casement windows we offer in our inspiration gallery. You can see fittings completed in homes just like your own.
View GalleryLatest Product Video
View our latest casement window video for a deeper insight into the windows we manufacture and supply!
View VideosFrequently asked questions
Can’t find the answer you’re looking for? Reach out to our customer support team.
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What services does Window Warehouse offer?
- Window Warehouse specialises in supplying high-quality uPVC and aluminium windows and doors. We provide expert advice, bespoke designs, and installation services to enhance your home.
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What areas do you cover?
- Being based in Portsmouth, we also cover the surrounding areas of Hampshire, Dorset, Somerset, Wiltshire, West Sussex, Berkshire, East Sussex, Gloucestershire, Kent and Surrey. You can find the complete list of locations on our areas we cover page.
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Does Window Warehouse serve both residential and commercial clients?
- Yes, we cater to both residential and commercial projects, providing tailored solutions to meet the unique needs of each client. Switch between the Homeowner and Trade sides of our site to find the products and services you’re looking for!