Subframes UK is the market leader of welded and mechanically joined window formers in the UK

At Subframes UK, we are the nation’s largest supplier and manufacturer of high quality, BBA certified window formers to suit all makes and types of windows and doors.

Situated in our Midlands-based factory, our experienced team manufacture premium window formers for commercial and domestic properties alike. Each product is subject to rigorous quality control before leaving our facility and delivered nationwide on a daily basis.

We provide a bespoke service designed to meet the specifications of particularly unique homes and commercial properties. You can choose from 2, 3, or 4-sided frames, with or without vented heads. Our range of window formers is available in a variety of shapes, such as circles, arches, ovals, mosque-inspired design, or a combination of T or P-shaped flags.

Our extensive collection includes standard, fire-rated and structural closers, spanning sizes from 50mm to 300mm.


Product lengths

All profiles comply with Building Regulations Part L and are available in lengths of 6 metres or can be custom-cut to specific dimensions. We offer a diverse range of products sourced from some of the UK’s top manufacturers in the industry, including Cavalok, Dacatie, Kingspan, Timloc and Titon Vents.

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