Since 1992

Permavent Leto Breathable Membrane 145gsm - 1.5m x 50m


We have 2 in stock

£59.85 inc. VAT



Manufactured by Permavent, the latest range of breather membranes LETO are  for use in warm non-ventilated and cold ventilated roofs. A three layer construction with two layers of non-woven polypropylene and  a microporous film between to form a breathable waterproof membrane.  A high quality material to regulate humidity and moisture levels and control condensation in the buidling. 

Technical Specifications:

Resistance to water penetration, class: w1
Water vapour transmission properties (sd), m:  0.02
Tensile strength to EN12311-1 (MD), N/50mm: 300
Tensile strength to EN12311-1 (CD), N/50mm: 200
Nail tear resistance to EN12310-1 (MD), N/50mm: 120
Nail tear resistance to EN12310-1 (CD), N/50mm: 140
Flexibility at low temperature to EN1109:2013: -40°C
Reaction to fire, class: E
Weight, gsm: 145

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