Manufactured from a specially formulated microporous film, laminated between two layers of non-woven polypropylene. Provides one of the highest permeability figures of any breather membrane.

700 High Performance Breather Membrane has a low ratio of calcium carbonate filler to polymer, which cements the structure of the material together. This ensures excellent durability and resistance to UV degradation.

Designed for use on warm and cold roofs where the roof is constructed in accordance with BS 5250: 2002, Control of Condensation in Buildings.


  • Outstanding breathability.
  • Unique microporous film specifically designed for roofing.
  • UV stabilized.
  • Maintains its performance at virtually all temperatures.
  • Extremely durable, lightweight and strong.
  • Large roll size reduces wastage and increases speed and efficiency of installation.
  • Energy efficient.
  • Entirely recyclable.

General information
Specification data - Vapour permeable sheets

Product Reference

700 High Performance Breather Membrane, FRCA4

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