Crittall Steel Window Systems for Residential Extensions
Corporate W20 Windows feature traditional, slender steel framing with welded corners and industrial detailing. Accepting double-glazing up to 16.4mm and finished with polyester powder coating, W20 suits heritage properties and renovations where original character must be preserved.
Corporate W20 TE (Thermal Efficient) brings higher energy performance to the same profile. Achieving U-values around 1.4 W/m²K, W20 TE helps extensions meet Approved Document L while maintaining slim sightlines. It also accommodates triple-glazing up to 37mm for improved insulation and noise reduction.
T60 Thermally Broken Steel Windows are Crittall’s most advanced system. Integral thermal breaks and fibreglass reinforcement enable whole-window U-values as low as 0.8 W/m²K, ideal for highly glazed extensions. T60 accepts insulating glass units up to 36mm and, with laminated acoustic glazing, can deliver sound reduction around 40dB.
Crittall Homelight® Windows reinterpret classic steel sightlines with contemporary performance. Slim profiles, weather-seals and secure hardware make Homelight a strong choice for residential extensions.