Permo® ecovent & SK²

Permo® ecovent NG is a lightweight three-layer vapour-permeable roofing underlay suitable for warm and cold pitched roofs. Allows roof structure to breathe, weathertight. SK2 has a double integral tape – creating a strong and
durable airtight seal to reduce energy loss.


KU0039-2-15  |  50 x 1.5m  |  8.25kg  |  20 rolls/pallet
KU0039-2  |  50 x 1.1m  |  6kg  |  20 rolls/pallet
KU0039-2-11-15  |  50 x 1.5m SK²  |  8.25kg  |  20 rolls/pallet
KU0039-2-11-15  |  50 x 1.1m SK²  |  6kg  |  20 rolls/pallet

  • BBA approved for non-ventilated cold and warm roofs
  • UV stable for four months
  • Type LR underlay
  • Limits air leakage in sealed roof applications

Laminated sheet material, with outer layers of polypropylene, and an inner layer of polyethylene

  • BBA cold 
  • BBA warm
  • DOP

Counterbattens only required on fully supported applications

UK Wind Zone Guide

  • Permo ecovent NG zones 1-2 with maximum overlap batten gauge 
  • Permo ecovent NG SK² all zones

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