PVCu Windows from Window Warehouse, Portsmouth

Halo PVCu Windows

Our PVCu casement windows come with chamfered and sculptured frames and  achieve the highest A+ energy rating. They are very popular with homeowners and are manufactured in our Portsmouth factory.

Aluminium windows from Window Warehouse, Portsmouth

Aluminium Windows

As a Schuco Manufacturing Partner, Window Warehouse offers casement and tilt & turn aluminium windows to the trade from our Hampshire factory making delivery quick and simple.

Flush sash window installations

Flush Sash Windows

Our flush sash windows combine a traditional heritage window with a sleek contemporary design giving homeowners a period style window with all the modern features they’d expect.

Georgian Bar Windows, Portsmouth

Heritage Windows

Window Warehouse manufactures heritage windows including PVCu Georgian bar windows and heritage sash horn windows. All are made using Halo 70mm frames in a range of heritage colours.

Tilt and Turn Window

Tilt and Turn Windows

PVCu tilt and turn windows are an ideal solution for awkward spaces and limited access cleaning as they open inwards. Window Warehouse offers a choice between two fitting kits.

Sliding Sash windows, Portsmouth

Sliding Sash Windows

Our PVCu vertical sliding sash windows give period properties a traditional look and feel with all the security and energy efficiency features you would expect from the experts.

Complete Range of Windows from Window Warehouse

Window Warehouse manufactures PVCu and aluminium windows, and supplies direct to the trade, from is factory in Portsmouth.

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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 BS6375 and PAS 24, 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 9001:2008 Quality Assurance and CENSolutions CMS Mark (CMS 6023W): Factory Production Control System compliance to EN 14351-1:2006.
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.