Cotswold extension

As the project evolved the clients decided that they wanted as near zero carbon an extension as possible , drawing heavily on the detailing and design of the Denby Dale Passivhaus, which we visited during the design stage. So we used many of the same features, for example Teplo Ties in the cavity wall and installing windows within the insulation using plywood boxes and aluminium cavity closers. The extension has been built with its own thermal envelope which is separate from the rest of the house, with external grade doors linking it to the rest of the house, so effectively it is a separate building. The clients now live in the extension most of the time in winter, expanding into the rest of the house when they have visitors or need more space.

The existing building had white painted timber windows, so we needed to match them. For the extension we needed triple glazed units with low U values, that fitted in with the building’s aesthetic and that were not astronomical in price. The PERFORMANCE range fitted the bill and the add-on glazing bars worked well and helped the windows blend in with the aesthetic of the existing building.