Oversills
These oversills are designed to work with external insulation and give the appearance of a traditional stone or concrete sill.
Our oversill has 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.
A Passive sills oversill is a perfect addition to any external insulation project give you a traditional appearance it also has far superior acoustic properties than an aluminium sill during heavy rain and hailstone.
Our oversills are available in our hybrid finish, which has a white paint primer coat and is ready to be painted in any colour you choose.
Our Finishes
Where to use this Products:
- Retrofits
- Solid Block Constructions
- External Insulation
These may vary depending on the specifics of your build. Use our Product Finder to find the perfect thing for you.
Technical Information
Installation Videos
Watch oversills being installed – these videos explain the installation process of our passive oversill so you can do it yourself at home.
Contact us if you require more details or view more videos on our Installation Videos page.
Covering a broken window sill with an insulated oversill
Installing a Passive Sills Oversill on External Wall Insulation
Technical Drawings
Technical Model
