Cromar Vent 3 Classic Breathable Roofing Membrane 1.5 x 50m - 135gsm

Product Code
Cromar Vent 3 Classic Breathable Roofing Membrane 1.5 x 50m - 135gsm
Upto 7 working days Delivery available
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£83.99 £69.99
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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, compared to 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


  • 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
More Information
Coverage 50 m²
Length 50
Width 1.5

Delivery charges

Minimum order delivery charges are applicable to certain products. More information about can be found on our Delivery Information page.

Online orders below £300 ex VAT are subject to delivery charges, as stated below:
- £0 - £149.99 ex Vat , Delivery charge £25 +VAT (£30 incl VAT)
- £150 - £300 ex Vat, Delivery Charge £20 + VAT (£24 incl VAT)
- £300 ex Vat + : No delivery Charge.

Returns & Refunds

We want you to be happy with your purchase, however if you change your mind you can return it to us. We will take back any items that are in a resellable condition within 14 days of purchase.

You can either:
Return it to your local with proof of purchase
Arrange collection by emailing us at with your order number and product details The return of perishable items (i.e. cement, plaster) will not be accepted.

*Please note that our minimum charge for this collection service is 15% of the order value and may be more depending on your location and product type. Once the products have been returned, you will be refunded within 7 days.

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