77IW Open-In Window

The government’s Future Homes Standard, set to become law in 2025, sets some challenging new targets for the energy efficiency of windows and doors. Our impressive 77IW Open-In system already meets those targets and is our highest performing window yet.

Insulated centre seals, high performance thermal break materials and extra insulating foams mean this is a window which can achieve impressively low U-Values even with standard double glazing.

The modern slim lines and minimalist aesthetic make the 77IW an ideal choice for new build and contemporary refurbs. The slim frames mean there’s a larger glass area to let plenty of light flood in, and there’s even a choice of inward or outward opening frames for maximum flexibility.

DESIGN FEATURES

The 77IW window is available in top, side or bottom hung configurations, all in a standard 77mm frame depth.

OPTIONS

The 77IW is very much a contemporary window system, but you can still match it to your own style with a range of colours, textures and customisation options – from glazing bars to leaded glass.