Drainage Material
Optigrün uses the tried-and-tested Perl bulk material drainage systems in the multi-layer system structures of extensive and intensive green roofs.
Depending on the region, mineral bulk materials include expanded clay, lava or bricks. Crushed grains in the range of 2-12 mm for extensive green roofs and intensive green roofs without water accumulation; partially crushed grains 8-16 mm for intensive green roofs with water accumulation.
Natural material, easy to recycle, drainage system for flat roofs, natural water reservoir that keeps the water available for plants: approx. 8 litres/m² at an installation height of 50 mm (pore storage). Supported by the WKK water channel for long flow lengths. Simple levelling of uneven roofs.