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.
- Increases the installation height of the flat roof windows
- Integrates with roof material
- Highly efficient
- Allows rainwater to drain away
- Additional flexibility
- Compatible with all VELUX base units
- Provides additional height for warm roof construction