Drainage boards for all green roof types. DIADEM’s drainage boards are specifically designed for Mediterranean conditions, retaining the maximum amount of water and distributing it to the vegetation root systems under dry heat conditions. Their design allows optimum flow of excess water, while their high resistance to mechanical stress allows them to be used not only for planting but also for the creation of driveways, timber constructions (decks, pergolas) and more.

The drainage system is placed above the protection and water retention layer in the form of boards that overlap each other by 1 to 2 cells. The drainage system is positioned with the holes facing upwards when it is planted, so as to store water, and with the holes facing downwards when used as infrastructure for hard flooring. The placement of the drainage boards starts from top to bottom following the grading of the roof.