Flat roof covered with gravel
Flat roof covered with synthetic material or bitumen
Flat roof covered with grass or other plants
Sloping roof covered with panels or tiles
Sloped roof covered with synthetic material or bitumen
Sloping roof covered with grass or other plants
To know the average rainfall for your country, Click here
then enter the average rainfall per year above.
Roof surface and recovered water
Optimal materials for the roof: prefer tiles, natural slates, zinc and glass.
Other materials available: concrete, galvanized iron corrugated iron, plastic.
For good water quality, do not use for roofing: Copper, aluminum, synthetic materials, tar, wood, green roof.