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Permavent APEX

Permavent APEX

Permavent APEX is both an air and vapour permeable membrane for use as a pitched roof underlay.

Description

Permavent APEX is a 3 layer breather membrane for use as a pitched roof underlay. Permanent APEX is both vapour and air permeable providing unique condensation control which eliminates the need for low or high level ventilation. Permavent APEX also provides a secondary barrier to water ingress.

APEX has been endorsed by NHBC for use as an unsupported roof underlay in cold pitched roofs without the need to provide any  ventilation at either high or low level.

Permavent APEX is fully compliant with BS5534 and an integrated tape allows APEX to be installed in all UK wind zones.

Features

  • Air and Vapour permeable membrane
  • 180 g/m2
  • Integrated Tape (25% less membrane usage)
  • Use without ventilation
  • NHBC approved
  • Conforms to BS5534
  • LABC Certified
  • 3 layers membrane
  • For use on any types of roofing/walling applications
  • UV stable for 3 months
  • Available in 1m x 50m roll
  • The untaped version is also available.

 

Fully Air Permeable
APEX air permeability allows moisture to escape through the movement of air to flow through the roof, which eliminates interstitial condensation in pitched roofs. This can be particularly important during the drying out period of a new build.

 

Vapour Permeable

Permavent APEX vapour permeability helps to reduce the condensation withing the roof structure, whilst protecting it from the rain and wind outside. Permavent APEX has Sd value 0.01m.

 

Water Resistance

Permavent APEX is highly water resistant with W1 rating (EN 13589).

 

NHBC Acceptance

Permavent APEX has been endorsed by NHBC for use as an unsupported roof underlay without the need to provide any ventilation at either high or low level.

 

Compliant with BS5534:2014

Permavent APEX is fully compliant with BS5534 and can be used in all UK wind zones without the need any ventilation.

 

Integrated Double Tape System

Permavent APEX comes with unique integrated double sided tape system. This ensures that the laps of the membrane are restrained in any weather condition using a 100mm head lap and meet the BS5534 standard. Reduces membrane usage by up 25%.

Specifications

Weight, g/m2180
Water tightness, classW1
Water vapour transmission (sd), m0.01
Maximum tensile force (MD), N/50mm358
Maximum tensile force (CD), N/50mm304
Elongation at max. tensile force (MD), %70
Elongation at max. tensile force (CD), %72
Resistance to tearing MD (nail shank), N214
Resistance to tearing CD (nail shank), N218

UK Wind Zones

Taped Lap1-5
Batten Lap1-3
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