This extension kerb for flat roof windows allows installation in warm, grass or sedum roof constructions. It raises the polycarbonate dome from the base of the kerb by 150mm. The increase in height does not allow the snowfall to reach the top. This VELUX extension kerb is efficient at increasing the amount of natural daylight underneath a flat roof. 10 year guarantee.
- Highly efficient
- Additional flexibility
- Ease of use
- Integrates with roof material
- Increases the height of the roof windows
- Allows rainwater to drain away