Drainage Material 8-16 BS
Optigrün Drainage Material 8-16 BS is used as drainage layer beneath extensive and intensive green roofs, for pressure resistant filling of Drainage Boards and as lightweight drainage and equalization layer beneath paving.
| Material | Expanded shale |
| Grading | 8 - 16 mm |
| Frost resistant | DIN 4226 |
| Salt content | < 1.0 g/l |
| Max. water capacity | 16 Vol% |
| Water permeability | > 420 mm/min |
| Weight dry | approx. 730 kg/m³ |
| Weight when saturated | approx. 890 kg/m³ |
