Condensation control for metal roofing
Permavent METAL is a vapour permeable drainage membrane for all types of standing seam and metal roofs.
It acts as condensation control for metal roofing, allowing water to drain away.
It is ideal for roof pitches over 30° and will mask irregularities such as board joins that could deform the metal roof covering.
| Weight, g/m2 | 440 |
| Water tightness, class | W1 |
| Water vapour transmission (sd),m | 0.02 |
| Maximum tensile force (MD), N/50mm | 320 |
| Maximum tensile force (CD), N/50mm | 200 |
| Elongation at max. tensile force (MD), % | 75 |
| Elongation at max. tensile force (CD), % | 100 |
| Resistance to tearing MD (nail shank), N | 150 |
| Resistance to tearing CD (nail shank), N | 200 |
| Acoustic damping value, db | 8 |
