Trade Manufacturer

Trade Manufacturing

Serving the trade for over 30 years

Window Warehouse has always been a trade fabricator, so we’re focussed on offering installers great quality windows and doors with a fast, dependable service.

30 years of Window Warehouse, Portsmouth
Commercial contract for self-build development

Better windows & doors

We make sure our product range gives you something different to offer your customers. We offer three Halo PVCu window suites including FlushSash, with a higher hardware specification as standard and wide choice of colour options. Our dedicated aluminium factory makes Aluminium Windows, bifold doors and lift and slide doors for residential and commercial projects.

Fast Service

We know you need to get quotes back to your customers quickly, so we always get prices to you within a maximum of 24 hours. And our online Window Designer service means you can get quotes and place order anytime.
Our order turnaround is fast and reliable, we keep you informed about your order so you always know when your windows and doors are being delivered.

Marketing support

Because we are a Halo Approved Fabricator, installers can join the Halo Approved Installer Scheme through us to get extra marketing support.

Halo approved installer logo
Network VEKA

Independent Network

Independent Network offers installers a complete sales support system – from sales lead, right through to insurance backed guarantee and customer referrals. Homeowners looking for a local company that offers high quality, windows and doors and guaranteed workmanship can easily find a trusted Independent Network member.

Window Warehouse is an Independent Network approved trade fabricator so ask us about how becoming a member of this industry leading scheme can help your business.


Based in Portsmouth, Window Warehouse offers builders and contractors a reliable service for commercial and domestic glazing in either UPVC or aluminium. We can advise on how you can comply with the latest Building Regulations including Document Q requirements and you can call in our trade showroom to see the range from shopfronts to bifold doors. If you need it fitting, we can also help you find a local reliable installer.

Visit our trade showroom

Send your customers to our trade showroom and we’ll show them the styles, colours and options on offer, to help them choose exactly what they want before you place an order.

Window Warehouse Factory in Portsmouth

About Us

Malcolm Cake started Window Warehouse in 1986 and over 30 years later we are still serving some of our original customers. We are one of Halo’s longest standing trade fabricators and manufacture in Portsmouth.


We test our products to PAS 24 standards, meeting the latest Document Q Building Regulation requirements for new buildings.

Independent 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 so talk to us about our outstanding installer support.


Our team is on hand to give you all the support you need. Our experts can give you technical and installation advice and offer we professional marketing and business support with our exclusive Haven retail brand promoted across Hampshire and the South Coast.

Quality First

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 from Window Warehouse

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. As one of the longest standing Halo Trade Fabricator partners Window Warehouse.