Cromar Vent 3 Classic Breathable Roofing Membrane 1.5 x 50m - 115gsm

Vent 3® Classic is a breathable roof underlay that gives major benefits
over traditional underlays. The Cromar breather felt is made from two high-tensile, spun-bonded
polypropylene layers. This triple-layer, high performance, breathable membrane
is thermally calendared to a micro-porous polypropylene film.

• Layer one
  - waterproof surface
• Layer two
  - breathable waterproof membrane
• Layer
  three - protection from abrasion and damage, giving additional strength

This product has exactly the same specifications as the
Vent 3 Light breathable membrane, but the Classic has a heavier GSM at 115 than this Light's 95 GSM.

• Clean and easy to use
• Lightweight and flexible
• Waterproof membrane
• Long-term durability and tensile/tear strength
• BS 5534:2014 compliant

Application

• Can be used in supported or unsupported roof systems, regardless of
  whether they are tile, slate or metal, and in warm and cold roof
  applications.
• Equally effective whether draped unsupported over rafters or laid
  directly onto insulation.
• High vapour permeability
• High wind uplift resistance