D1 drainage mat — bulk composite material for drainage.
Physical and mechanical characteristics
| Indicator name | Guideline values |
| 1D | |
| Thickness, mm, ± 10%, at load: | |
| 200 kPa | 4.5 |
| elongation at break,%, not less | |
| along | 50 |
| across | 50 |
| Indicator name | Guideline values |
| 1D | |
| Thickness, mm, ± 10%, at load: | |
| 200 kPa | 4.5 |
| elongation at break,%, not less | |
| along | 50 |
| across | 50 |