Sustainable Windows and Doors Limited are the UK’s largest sales partner for the Swedish window and door manufacturer SP Fonster (part of the VKR group), their range of triple glazed high performance windows are available in any number of combinations to suit most design and performance criteria whether they are thermal or acoustic.

We supply timber finished products in a wide variety of stains and paints and aluminium clad composite products which have a virtually maintenance free lifespan. Through  technically advanced production methods windows can be specified with U-values as low as 0.8W/m2K and a BFRC energy rating of 'A' making them suitable for Passivhaus and Code For Sustainable Homes level 5 projects . The products can also be specified to Secure by Design and PAS 23 & PAS 24 certified standards. All timber utilised in production is PEFC and FSC certified.

We provide a full service package from initial technical advice, free design and estimating to our own installation teams and a full project management service.