LETO Roofing Membranes

LETO 125 Breather Membrane

This product has BBA Certification 23/6857 and is a Class E reaction to fire.

Technical Characteristics

CharacteristicValue
Resistance to water penetrationClass W1
Water vapour transmission (sd)0.02 m
Tensile strength (MD/CD)280 / 155 N/50mm
Nail tear resistance (MD/CD)100 / 120 N/50mm
Flexibility at low temperature-40°C

Available Rolls & Downloads

Product CodeDescriptionRoll SizeRoll WeightPallet QtyFull Data Card
Leto50125 Leto 125g 1 x 50m 1m x 50m 6.9kg 33 rolls ⬇ Download PDF
Leto75125 Leto 125g 1.5 x 50m 1m x 50m 10.35kg 42 rolls ⬇ Download PDF

LETO 145 Breather Membrane

This product has BBA Certification 23/6857 and is a Class E reaction to fire.

Technical Characteristics

CharacteristicValue
Resistance to water penetrationClass W1
Water vapour transmission (sd)0.02 m
Tensile strength (MD/CD)300 / 200 N/50mm
Nail tear resistance (MD/CD)120 / 140 N/50mm
Flexibility at low temperature-40°C

Available Rolls & Downloads

Product CodeDescriptionRoll SizeRoll WeightPallet QtyFull Data Card
Leto50145 Leto 145g 1.0 x 50m 1m x 50m 7.4kg 33 rolls ⬇ Download PDF
Leto75145 Leto 145g 1.5 x 50m 1.5m x 50m 11.1kg 36 rolls ⬇ Download PDF

LETO 175 Breather Membrane

This product has BBA Certification 23/6857 and is a Class E reaction to fire.

Technical Characteristics

CharacteristicValue
Resistance to water penetrationClass W1
Water vapour transmission (sd)0.02 m
Tensile strength (MD/CD)350 / 240 N/50mm
Nail tear resistance (MD/CD)240 / 230 N/50mm
Flexibility at low temperature-40°C

Available Rolls & Downloads

Product CodeDescriptionRoll SizeRoll WeightPallet QtyFull Data Card
Leto50175 Leto 175g 1.0 x 50m 1m x 50m 8.75kg 33 rolls ⬇ Download PDF
Leto75175 Leto 175g 1.5 x 50m 1.5m x 50m 13.13kg 28 rolls ⬇ Download PDF

Technical Support & Enquiries

For any questions regarding our products, please contact us.

  • Email: n.cooper@permavent.co.uk
  • Phone: +44 7917 864 200
  • Address: 11 Cumberland Drive, Granby Industrial Estate, Weymouth. DT4 9TB