Breather Membrane

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Name	Permavent APEX	Permavent BLACK Breather Membrane	Permavent DRY+	Permavent ECO	Permavent GRAPHITE	Permavent MAX ALL ZONES	Permavent METAL	Permavent RED
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Description	Air open and vapour permeable underlay	Vapour-permeable roofing underlay	High Performance Membrane	Lightweight vapour permeable membrane	Vapour-permeable underlay used as a secondary barrier	Vapour-permeable underlay, suitable for all wind zones and installation methods	Condensation Control for Metal Roofing	Ultra Strong vapour permeable underlay
Features	Suitable for use with all types of solar panels BBA certified 23/6867 Integrated double tape system	Vapour-permeable membrane for roof and wall constructions Suitable for use with all types of solar panels BBA certified 22/6247	High performance construction membranes Vapour permeable Integrated tapes, suitable in all UK wind zones	Low cost membrane Versatile	Vapour-permeable membrane Suitable for use with all types of solar panels BBA certified 22/6112	Vapour-permeable membrane Suitable for use in all wind exposure zones BBA certified 22/6247	For standing seam and fully supported metal roofing	Superior tensile strength Superior tear resistance For use on any types of roofing/walling applications
Elongation at max. tensile force (CD), %	68	60		70	60	70	100	70
Elongation at max. tensile force (MD), %	56	70		60	60	60	75	70
Weight, g/m2	180		220	90		150	440	160
Water vapour transmission (sd), m	0.01		0.02	0.02		0.02	0.02	0.02
Maximum tensile force (MD), N/50mm	330		490	260		300	320	350
Maximum tensile force (CD), N/50mm	270		310	170		200	200	240
Resistance to tearing MD (nail shank), N	210		260	100		100	150	140
Resistance to tearing CD (nail shank), N	210		385	120		100	200	230
Taped Lap	1-5	1-5		1-5	1-5	1-5		1-5
Water tightness, class	W1		w1	W1		W1	W1	W1
Batten Lap	1-3	1-2		1	1-3	1-5
Resistance to tearing (nail shank) (CD), N		≥50			≥50
Reaction to fire, Class		E			E
UV stability, Months		3			3
Resistance to water penetration, Class		W1			W1
Tensile strength (CD), N/50mm		155			175
Tensile strength (MD), N/50mm		280			245
Water vapour transmission (Sd), m		0.02			0.02
Weight, g/m2		120			130
Resistance to tearing (nail shank) (MD), N		≥50
UV Stability, months			3
Resistance to tearing (nail shank) (MD), N					≥50
Acoustic damping value, db							8