Klober Permo Forte
Klober Permo Forte Breather Membrane
Klober Permo Forte has a unique plastic ripstop grid, which helps prevent tearing. A special inner layer allows water vapour to exit the roof space while preventing rainwater and moisture from entering the building. Each roll is 50 x 1.1m covering 55m ².
The durable, 4-layer fabric of reinforced microporous polythene film, with the outer layers of bond polypropylene. An internal reinforcing mesh makes this membrane tough and easy to handle. This extra-strong, vapour permeable underlay is suitable for installation on a warm or cold roof design.
| Specification | Value |
| Weight, g/m ² | 145 |
| Water Tightness (Class) | W1 |
| Water Vapour Transmission (sd), m | 0.03 |
| Water Vapour Permeability g/m ²/day | 1342 |
| Tensile Strength Longitudinal/transverse N/50mm | 430/370 |
| Nail Tear Strength Longitudinal/transverse N | 320/340 |
| Fire Rating | Class E |
| Temperature | -40 °C to +80 °C |
| UV Exposure | 4 Months |
| Vapour resistance, MNs/g-1 | 0.15 |
This breather membrane conforms with many standards including BS 3177, it is CE certified, holds a BBA certification (Cert No. 99/3622), and is covered by Klobers 10-year guarantee.
It is suitable to use in wind zones 1-4 if using battened laps and 1-5 if laps are secure with tape.
