Permo Sec is a metal, 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.
Suitable for metal roofs with a minimumpitch of 3°.
Can be laid over rigid insulation or timber boarding.
Permo sec metal should be laid in accordance with our full installation instructions.
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.