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 membrane	Vapour-permeable roofing underlay	High Performance Membrane	Lightweight vapour permeable membrane	Vapour-permeable underlay used as a secondary barrier	Vapour-permeable membrane, suitable for all wind zones and installation methods	Condensation Control for Metal Roofing	Ultra Strong vapour permeable Membrane
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
Weight, g/m2	180	120	220	90	130	150	440	160
Water tightness, class	W1	W1	w1	W1	W1	W1	W1	W1
Water vapour transmission (sd), m	0.01	0.02	0.02	0.02	0.02	0.02	0.02	0.02
Maximum tensile force (MD), N/50mm	330	300	490	260	245	300	320	350
Maximum tensile force (CD), N/50mm	270	200	310	170	175	200	200	240
Resistance to tearing MD (nail shank), N	210	120	260	100	130	100	150	140
Resistance to tearing CD (nail shank), N	210	160	385	120	140	100	200	230
Elongation at max. tensile force (MD), %	56	70		60	50	60	75	70
Elongation at max. tensile force (CD), %	68	60		70	60	70	100	70
Taped Lap	1-5	1-5		1-5	1-5	1-5		1-5
Batten Lap	1-3	1-2		1	1-3	1-5
UV Stability, months			3
Acoustic damping value, db							8