Sheerframe HED windows have been used to meet level three of the Code for Sustainable Homes on a housing development in Freckleton near Preston

The A+ rated Sheerframe HED casement windows, manufactured by Crystal Upvc, achieve a U-value of 0.8W/m2K through the use of multi-chamber frames fitted with Thermlock thermally enhanced reinforcing, and triple-glazed inert-gas filled sealed units. The units are fitted in the homes using Sheerframe cavity closers.

Sheerframe HED windows are calcium organic stabilised and heavy metal free, and wholly recyclable at the end of their expected 35 year life.