Klober Permo Forte is an extremely strong, four-layer roof underlay with a built-in safety grid. The low vapour resistance, permeable roof membrane is available with or without self-adhesive tape and is suitable for pitched roofs. It is a particularly effective solution for controlling condensation, whilst the self-adhesive tape creates a secure airtight seal, reducing energy loss. Permo Forte is a BBA approved low resistance roof membrane.
Suitable for Cold and Warm Roofs.
Wind zones 1-4 with battened headlap.All wind zones with taped headlap.
Highly suitable for period buildings
An unsupported underlay should provide a drape between rafters sufficient enough to ensure that any water will run away
Contact between the membrane and the roof covering should be avoided during and after installation
Should be laid with Underlay Support Trays with a maximum drape of 15mm.