Manufacturers of window units

Kawneer UK Ltd

A global leader in innovative façade solutions that make buildings capable of greater performance.

Senior Architectural Systems Ltd

Innovative window, door and curtain wall systems bringing buildings to life.

NorDan UK Ltd

NorDan is Europe's Preferred Manufacturer of High-Performance Timber Windows and Doors

Selectaglaze Ltd

Precision Bespoke Secondary Glazing. Experts in retrofit and security projects.

Kalwall

The most highly insulating, diffuse light-transmitting, structural sandwich panel in the world.

Metal Technology Ltd

Defining Spaces

Ventrolla Sash Window Specialists

Sash Window Specialists | Your Experts in Heritage Home Improvement

Crittall Windows Ltd

Steel windows, doors and internal screens

Schueco UK Ltd

Windows, doors and façades – sustainable and innovative

The Rooflight Co.

Awakening the beauty of natural light through rooflights and roof windows.

Reynaers Aluminium

Together for Better

Granada Secondary Glazing

Secondary Glazing Specialists

Fakro GB Ltd

Better fit a FAKRO

Mumford & Wood Ltd

Britain's finest timber windows and doors

Sheerline

Innovative aluminium window, door and roof lantern systems made in the UK.

Lomax + Wood Limited

Made to order timber windows & doors

TRC Windows

Experts in New Bespoke Timber Sash & Casement windows. Masters of Window Restoration

VELUX Company Ltd

Transforming spaces

Roseview Windows

Specialist manufacturers of timber-alternative sash windows and aluminium secondary glazing

Westbury Windows & Joinery Ltd

An impressive reputation for manufacturing premium quality timber windows, doors and roof lanterns

Martec Engineering Group Ltd

Shaping Metals, Shaping Futures

Smart Architectural Aluminium

The UK's leading supplier of Residential and Commercial aluminium window and doors

Jack Aluminium Systems Ltd

Commercial & Residential Aluminium Window & Door Systems

Epwin Window Systems

System house of Profile 22, Spectus and Stellar Aluminium

Dortek Ltd

Opening Innovation

George Barnsdale

Timber windows and doors, crafted over time

Eurocell plc

Leading manufacturer & distributor of PVC-U window, door, conservatory and roofline systems

Bailey

Stonger Together

Werkman Tech

Leading the world in vacuum glass technology

Aluprof UK

Let's build a better future

Clement Windows Group

Superb steel windows, doors, screens and conservation rooflights

AluK (GB) Ltd

A leader in design and engineering of aluminium façade systems: curtain walling, windows and doors

Rationel Windows

Beautifully bespoke Scandinavian windows

Kestrel Aluminium Systems

Bringing light into living

Gilcrest Manufacturing

High Specification Cleanroom Systems

VEKA plc

Leading the global development of PVCu systems through quality, innovation & sustainability