Permo forte SK²  


Permo® forte is an extremely strong 4-layer vapour permeable underlay with a built-in safety grid. It is suitable for all pitched roofs. Permo® forte should be laid in accordance with our installation details and BBA/IAB Certificates.

Permo® forte SK² has a double integral tape at the laps. This creates a very effective and secure airtight seal, reducing energy loss.

  • Suitability/use Suitable for warm and cold pitched roofs. In accordance to BS 5534, suitable for all zones
  • Roll length 50 x 1.5m (75m2), 11.5kg
  • Abrasion resistance Very strong and robust vapour permeable underlay, 4 layer material with grid, BBA, IAB & CE approved for cold & warm roofs, UV stable for 4 months, Double hydrophobically treated, Allows the roof structure to breathe, yet fully waterproof, Counterbattens only required on fully supported applications, Limits air leakage in a sealed roof application, Type LR underlay, A double integral tape - creating a strong & durable airtight seal to reduce energy loss. This avoids the use of a separate tape, making installation faster.

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