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