DESCRIPTION

Permavent use the very latest technology from the medical industry to encapsulate the highest grade hydrophobic film inside the very highest quality spunbond polypropylene layers. Unlike other companies, who simply stick the different layers together, Permavent membranes are manufactured in a single process that greatly improves the quality and integrity of our membranes. This 3 in 1 process means that Permavent offer the best performing breather membranes in their class with superior strength, breathability, flexibility and durability.

This membrane is black on both sides.

Permavent-BLACK is also fully certified under the CE having been tested and certified by independent European laboratories.

Permavent membranes are certified for use in all types of roofing and walling applications and conform fully with:
BS 5250: 2011 Code of practice for control of condensation in buildings.
BS 5534: 2014 Code of practice for slating and tiling.
BS 8000-6: 1990 Workmanship on building sites.
BS EN 1991-1-4; 2005 +A1: 2010 +UK NA.
BS EN 13859: Flexible sheets for underlays.
BS EN 13501-1 2007.

PHYSICAL PROPERTIES

Weight, g/m2	120
Water tightness, class	w1
Water vapour transmission (sd),m	0.02
Maximum tensile force (MD), N/50mm	240
Maximum tensile force (CD), N/50mm	160
Elongation at max. tensile force (MD), %	100
Elongation at max. tensile force (CD), %	100
Resistance to tearing MD (nail shank), N	130
Resistance to tearing CD (nail shank), N	170