Breather Membrane

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Name	Permavent APEX	Permavent BLACK	Permavent DRY+	Permavent ECO	Permavent GRAPHITE	Permavent MAX ALL ZONES	Permavent METAL	Permavent RED
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Description	Air Permeable Extra	High performance vapour permeable membrane	High Performance Membrane	Lightweight vapour permeable membrane	Highly durable vapour permeable membrane	High Performance vapour permeable Membrane	Condensation Control for Metal Roofing	Ultra Strong vapour permeable Membrane
Features	Air and vapour permeable membrane Integrated tape (untaped option available) BBA Certified No need for ventilation	Highly breathable Black on both sides Value membrane	High performance construction membranes Vapour permeable Integrated tapes, suitable in all UK wind zones	Low cost membrane Versatile	Highly durable Excellent tensile strength Excellent tear resistance	Suitable for all wind zones regardless of fitting method Universal	For standing seam and fully supported metal roofing	Superior tensile strength Superior tear resistance For use on any types of roofing/walling applications
Water tightness, class	W1	W1	w1	W1	W1	W1	W1	W1
Elongation at max. tensile force (MD), %	56	70	60	60	50	60	75	70
Elongation at max. tensile force (CD), %	68	60	90	70	60	70	100	70
Weight, g/m2	180	120		90	130	150	440	160
Maximum tensile force (MD), N/50mm	330	300		260	245	300	320	350
Maximum tensile force (CD), N/50mm	270	200		170	175	200	200	240
Resistance to tearing MD (nail shank), N	210	120		100	130	100	150	140
Resistance to tearing CD (nail shank), N	210	160		120	140	100	200	230
Water vapour transmission (sd),m			0.02	0.02	0.02	0.02	0.02	0.02
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
Water vapour transmission (sd), m	0.01	0.02
Weight, g/m²			220
Tensile strength to EN12311-1 (MD), N/50mm			480
Tensile strength to EN12311-1 (CD), N/50mm			310
Nail tear resistance to EN12310-1 (MD), N/50mm			260
Nail tear resistance to EN12310-1 (CD), N/50mm			380
UV Stability, months			3
Acoustic damping value, db							8