Permo® air-open and vapour-permeable underlays
Permo sec 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.
Outer layer of polypropylene mesh bonded to a vapour permeable membrane. 5 layer fleece foil combination
of polyolefin, hydrophobic treatment and PP monofilament mesh.
The product is laid between the timber deck/insulation and the outer metal roof covering and can either be laid horizontally or vertically and is fixed using non-ferrous staples or flat head clout nails on the overlap. Permo sec should be laid in accordance with our full installation instructions.
|Weight, EN 1849-2||550 g/m2|
|Water vapour transmission sd-Value, EN 12572||0,03 m|
|Water column, EN 20811||>3000 mm|
|Resistance to water penetration, EN 1928||W1|
|Resistance to air penetration||<0,1 m3/m2 h 50 Pa|
|Reaction to fire, EN 13501-1, EN 11925-2||Ε
|Resistance to temperature||- 30 °C έως + 100 °C|
|Melting point||200 ° C|
|UV exposure EN 13859-1||4 months|
|Acoustic damping value||8db|