Epwin Window Systems

Epwin Window Systems is a leading manufacturer of advanced, low-emission PVC-U and aluminium window and door systems, serving the fenestration and construction sectors. Epwin Window is part of Epwin Group, the UK’s foremost building material manufacturer encompassing an array of construction materials from guttering, rooflines, decking, cladding and fascia systems.

With over 50 years of experience, we’ve earned the trust of the social housing, private residential, and education sectors by delivering energy-efficient, durable, and user-focused solutions with minimal environmental impact.

Epwin Window Systems offers one of the largest product portfolios in the industry, featuring trusted brands such as Profile 22, Spectus, Stellar, and PatioMaster, alongside stand-alone systems. This broad range enables specifiers to source both PVC-U and aluminium products from a single manufacturer.

All products are Secured by Design and PAS 24:2022 certified and come with a standard 10-year manufacturer guarantee.

Our Window and Door

Profile 22

An award-winning system built for the future, Profile 22 features a unique 6-chambered outer frame and 5-chambered sash for superior insulation and reduced energy loss. With a proven track record across residential and education sectors for over 40 years, it combines performance with reliability.

PatioMaster Inline Sliding Door

A sleek, slimline patio door designed to maximise natural light and create seamless indoor-outdoor transitions. Available in 2, 3, 4, or 6-pane configurations, with spans up to 6 metres. The easy-glide tracking system ensures long-lasting performance and enhances building aesthetics.

Stellar Aluminium System

A multi-award-winning system with some of the slimmest sightlines on the market. From casement windows and bi-fold doors to flush tilt-and-turn windows, Stellar is designed for trouble-free installation. Patented knock-in beads speed up glazing and leave a clean internal finish. Made from up to 100% recycled aluminium, Stellar supports our closed-loop sustainability approach.

Flush Casement Window

Ideal for sensitive restorations, especially where equal sightlines are required. Available in multiple configurations, including French casement, and compatible with the Profile 22 range.

Flush Tilt & Turn Window

Offers a sleek, streamlined appearance with an externally flush design. Suitable for large apertures, it helps create bright, airy spaces.

Fully Reversible Window

Engineered for medium to high-rise and exposed locations, this window offers excellent thermal and weather performance. It rotates 180° for safe external cleaning from inside, and includes high-security locking and a child safety catch for maximum protection.

Vertical Sliding Sash Window

A market-leading system replicating traditional timber box sash windows, widely accepted by conservation officers for use in heritage and listed buildings. An ultra-slim 37mm meeting rail option enhances authenticity.

Sustainability

With a 17% market share, our products are installed in millions of properties nationwide. All profiles are extruded at our ISO 14001-accredited facility in Telford, reflecting our commitment to sustainable manufacturing and industry-leading quality.