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

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