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. The waterproof barrier 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. Additionally, it has an acoustic value of 8db, to help reduce the transmission of external structure sounds, such as heavy rain.
Area of application
- Suitable for metal roofs with a minimumpitch of 3°.
- Can be laid over rigid insulation or timber boarding.
Key Features
- Fully vapour permeable and waterproof, acting as a secondary barrier to moisture penetration.
- Allows movement between the outer covering and the structural deck.
- Accoustic value of 8db helps to reduce the transmission of sounds such as rain hammer.
- Prevents condensation that occurs on the underside of themetal roof covering from re-entering the roof structure.
