The VELUX Flat Roof Kerb allows you to put VELUX Roof Windows in a flat roof. This allows for flexibility when selecting the most appropriate type of window. The kerb is angled in a way which allows rain and dirt to drain off. The roofing material is dressed up the sides of the kerb then overlapped with the aluminium cover parts. Available in a variety of sizes to match your Roof Window and it has the VELUX 10 year guarantee. Suitable for installation on roof pitches between 0- 15 °.