Gravel
Gravel can be applied to create a vegetation-free zone on the roof. Gravel also keeps substrate and other small materials away from the roof drain. Using gravel in this way will prevent the drain from becoming blocked.
Materials
Shaded gravel 16/32.
Application
Gravel can applied at the edges of the roof, around drains and other objects, such as air conditioning units. Gravel is available in bags of 20 kg or in big bags of 1 m³.