Crittall Steel Windows - Authentic Supplier & Installer

Authentic Crittall Profiles — W20, W20 TE and Homelight Systems

We supply the complete range of genuine Crittall profiles — not crittall-style alternatives, but the authentic systems specified by architects, conservation officers and developers across the UK.

Homelight Range — Designed for residential replacement and refurbishment projects, combining traditional slim aesthetics with excellent thermal performance. The ideal choice for period homes where original character must be preserved.

Corporate W20— The iconic profile used since the 1920s. Narrow 20mm sightlines deliver maximum glazing area with minimal frame intrusion, making it the definitive choice for heritage projects and industrial-style interiors seeking authentic character.

W20 TE — Our most specified system for modern extensions and energy-conscious refurbishments. The thermally broken core accommodates double and triple glazing units while maintaining the W20’s signature slim sightline — achieving low U-values and full compliance with current building regulations without compromising the look.

All systems are available across the full RAL colour palette. Black steel windows remain our most popular finish, available in matte and satin options, alongside bronze, heritage colours and dual-colour specifications for different internal and external finishes.

Crittall Window Configurations — Every Opening, Every Style

Every crittall window we supply is made to measure for your specific opening and architectural requirements. Available configurations include:

Casement windows — side hung and top hung options
Fixed light windows — maximum glazing area, clean minimal lines
Picture windows — statement glazing for contemporary and period settings
Internal screens and partitions — defining spaces without closing them off
Bespoke shapes — arched, angled and non-standard openings handled as standard

Whether you need a single replacement casement in a Victorian terrace or a full run of floor-to-ceiling steel windows for a contemporary kitchen extension, every window is handcrafted in Britain using CNC precision for seamless, clean welded frames.

Thermal Performance and Double Glazed Crittall Windows

One of the most common questions we hear is whether crittall windows can meet modern energy efficiency requirements without losing their slim profile. The answer is yes — and the W20 TE system is the reason why.

Thermally broken steel profiles combined with high-performance double or triple glazing units deliver U-values that meet and exceed current building regulations, making thermally enhanced crittall windows a genuine option for new extensions, full refurbishments and any project where planning permission requires compliance with Part L. Superior sound reduction is an additional benefit, particularly valuable in urban settings and busy family homes.

Crittall Windows for Period Properties and Conservation Areas

For listed buildings, conservation area properties and period homes from the 1920s through to the 1960s, genuine Crittall steel windows are frequently the only specification conservation officers will accept. The authentic W20 profile satisfies planning requirements in a way that aluminium or uPVC alternatives cannot — preserving the historical character of a building while delivering double glazing performance behind the original sightlines.

Our team understands the specific requirements of heritage and conservation projects, from glazing specifications and colour matching to supporting documentation for planning applications. We have been working on period properties since 1935 and that experience shows in every detail.

Why Choose Lightfoot Windows for Your Crittall Project

As the largest and longest-running specialist Crittall partner in the UK, Lightfoot Windows has been supplying and installing crittall steel windows since 1935. That is not a marketing claim — it is nine decades of accumulated knowledge, refined installation technique and genuine product expertise that protects every project we take on.

From initial design consultation and precise site survey through to UK manufacture and expert installation, our team manages every stage in-house. No third party installers. No handoffs. Just a specialist team with a singular focus on getting crittall windows right.

Visit our London showroom to see profiles, finishes and glazing options in person before making any decisions — or contact us today to discuss your project, request a tailored quotation or arrange a site survey.