Permavent Max All Zones Breathable Roofing Underlay - Vapour Open Roofing Membrane

Permavent MAX All Zones is a high-performance vapour-permeable membrane. MAX All Zones is a versatile secondary waterproofing barrier, which exceeds the requirements of BS 5534:2014+A2:2018 code of practice for slating and tiling for pitched roofs and BS 5250:2021 Management of moisture in buildings.

Available in three formats

• Taped 50 – 1 m × 50 m roll with integrated double‑sided tape
• Untaped 50 – 1 m × 50 m roll, ready for use with site‑chosen tapes or sealants
• Untaped 75 – 1.5 m × 50 m roll for wider coverage when desired

Features and benefits:

• Highly durable.
• Excellent tensile strength.
• Excellent tear resistance.
• BBA certified.
• UV stable for three months.
• Suitable for all types of solar panel installation.
• Taped version
  • Built‑in double tape speeds up laps and seals, reducing overall membrane usage by up to 25%
  • Ideal where labour or tape compatibility is a concern.
• Untaped versions
  • Maximum flexibility to pair with your preferred tape or adhesive detailers.

Suitable for UK Wind Zones

• Taped Lap          1-5
• Batten Lap         1-5