Combined with a co-extrusion process, which delivers integral seals and gaskets, Sheerframe has the first UK window and curtain walling product to feature thermally enhanced structural reinforcing in its profile – the exclusive Thermlock system. This delivers strength and additional insulation without compromising on performance.

Individual windows can be specified to a wide range of thermal and security performances. High security windows can have U values down to 0.8W/m2K equivalent to passive haus zero carbon building design.