Solid Block Construction

These sills are designed to work with solid masonry construction with 200 mm external insulation and are installed in the same way as a traditional concrete sill.

Our passive window sills have an excellent insulation value, this improves the value by reducing the cold bridging at this point. It also improves the overall performance of your window.

Our passive window sills are 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.

Why choose Passive Sills

Complies with all building regulations

Best for thermal efficiency

Super lightweight

Quick and easy to install

Lower carbon footprint

Best for manual handling

Competitive cost when installed

10 year warranty

Installation Video



Technical Model


Our Finishes

If you want to know more, click the button below