Drainage Material Perl 2-10 BT
Optigrün Drainage Material Perl 2/10 BT is used as an especially lightweight drainage layer beneath extensive and intensive green roofs and for pressure resistant filling of Drainage Boards on roof structures with low load reserves.

Material | Expanded clay |
Grading | 2 - 10 mm |
Frost resistant | DIN 4226 |
Salt content | < 1.5 g/l |
Max. water capacity | 21 - 30 Vol% |
Water permeability | > 450 mm/min |
Weight dry | min. 360 kg/m³ |
Weight when saturated | max. 680 kg/m³ |