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.
Water vapour transmission EN 1931 (sd-value)
Resistance to water penetration EN 1928
Resistance to air penetration
< 0.1m3/m2 h 50 Pa
Outer layer of polypropylene mesh bonded to a vapour permeable membrane. 4 layer fleece foil combination of polyolefin, hydrophobic treatment and PP monofilament mesh.
Fire resistance Class (EN 13501-1)
Resistance to heat (EN12101-2)
-30ºC to +80ºC
Suitable for copper, zinc, aluminium and stainless steel standing seam roof finishes and the supporting deck.