Permo® sec metal

Permo® sec metal is a vapour permeable waterproofing barrier that is installed as a separating layer between copper, zinc, aluminium and stainless steel standing seam roof finishes and the supporting deck


KU0020-04  |  25 x 1.5m (37,5m²)  |  14.5 kg / 4 rolls/pallet

  • Covers irregularities within roof deck that could de-form metal roof covering
  • Fully waterproof secondary barrier to moisture penetration
  • Fully vapour permeable
  • Acustic value of 8db helps reduce the transmission of external structure borne sounds e.g rain hammer
  • Will not bond with the underside of outer covering in hot conditions
  • Allows movement between the outer covering and the structural deck
  • Offers protection against external moisture that may penetrate the outer roof covering
  • Provides an air space below zinc coverings to allow protective oxidation to form

Composite PP-spun fleece with coating

  • Suits roofs with a pitch greater than 3º
  • Prevents condensation that occurs on the underside of the metal roof covering from re-entering the roof structure. Any build-up of moisture between the outer metal roof covering and the Permo sec metal will be channelled safely to the eaves due to the nature of the 8mm mesh outer layer
  • Can be used as a temporary water proofing barrier. however, it is recommended that the outer covering is applied as quickly as possible 
  • Can be laid over rigid insulation or timber boarding

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