For maximum ventilation, Ondutiss membranes are the recommended air permeable membrane to use with Onduline’s ranges of bituminous corrugated roof sheets and shingles.
The ONDUTISS AIR 95 is a 95 gsm high vapour permeable membrane, suitable for cold and warm roof applications. Benefits include:
High vapour permeability ensuring the membranes absorb the vapour and keeps the insulation layer dry
No ventilation gap needed.
Totally waterproof, offering a secondary layer of protection against driving rain or snow.
Overlap indicators printed on the membranes for fast and easy installation.