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CROMAR Breathable Membrane Vent 3 Classic Roofing Underlay 1m x 25m Roll

Vent3 Classic is a breathable roof underlay for cold and warm roof applications which give major benefits over traditional roof underlays. 115gsm


Vent3 Classic is a triple layer fabric, high performance breather membrane, made from high tensile spun bonded polypropylene layers, around a micro‐porous polypropylene film. Designed for use in a fully supported or unsupported tiled, slated or metal roof system.


The high vapour permeability and waterproof nature of the membrane, combined with excellent tensile/tear strength and high wind uplift resistance make Vent3 Classic the professional’s choice as the ultimate breather membrane. It is equally suitable whether draped unsupported over rafters or laid directly over insulation.




  • BBA Certified
  • Cold & warm roof application
  • 3 Layer spun-bonded membrane
  • Clean & easy to use
  • Lightweight & flexible
  • Excellent tensile strength
  • Light grey surface prohibits glare
  • UV stable for up to 3 months


Please note this is a clearance item, you will receive the quantity selected, however these maybe split into several rolls (5m,10m etc) you will receive the ordered quantity or greater. This item is slight seconds and purchased in large lot’s allowing us to offer huge savings, they may have slight imperfections and will not have original packaging (although the rolls are Cromar marked) the rolls are still perfectly usable and offer a huge saving off the RRP.


CROMAR Breathable Membrane Vent 3 Classic Roofing Underlay 1m x 25m Roll

SKU: TV3C/25
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