Passive Sills window sills are designed to work with timber frame construction and are installed in the same way as a traditional concrete sill.

For the majority of timber frame builds our P2 Sill would be ideal – 225mm depth with 25mm upstand. However, we have other sizes available if required.

Our passive window sills have an excellent insulation value. This improves the overall insulation value of a building by reducing the cold bridging at the point where the sill and window meet.

The Passive Sills P2 window sill is approximately 10% of the weight of a traditional concrete or stone sill and reduces the risk of manual handling injuries on site.

Our window sills are available in our hybrid finish, which has a white paint primer coat and is ready to be painted any colour you choose.