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Cromar Vent 3 Classic Breather Membrane Felt Underlay 1m x 50m (50m2/Roll)

URN: 5004113

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£48.00ex. VAT £0.96 per m2
£48.00ex. VAT
£0.96 per m2
Coverage required
m
m
Based on your total area of m2 (inc. 10% wastage) - of these are required (actual coverage of m2)

We recommend purchasing at least 10% extra product to allow for errors, damages or obstacles

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.

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Nationwide Delivery

Wed 23 Jul

Order by Monday at 2pm
  • 2days
  • 13hrs
  • 57mins
  • 53secs

Delivery & Returns Info

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Product Overview

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.

URN: 5004113
£48.00ex. VAT

Delivery & Returns Information

How Our Delivery Works

We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.

Delivery Areas & Charges

Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, KW, IV, LA, LD, LL, NP, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.

Standard (Nationwide) Delivery

Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
ORDER VALUE DELIVERY CHARGE
Under £100 £20 ex. VAT
Between £100 - £200 ex. VAT £10 ex. VAT
Over £200 ex. VAT FREE
Insulation, Plasterboard and Drylining Products
ORDER VALUE DELIVERY CHARGE
Under £150 £40 ex. VAT
Between £150 - £350 ex. VAT £35 ex. VAT
Over £350 ex. VAT FREE
Screws & Fixings and Adhesives & Sealants
ORDER VALUE DELIVERY CHARGE
Under £100 £7.50 ex. VAT
Over £100 ex. VAT FREE

Express Delivery

Express Delivery - Insulation and Plasterboard & Drylining
ORDER VALUE DELIVERY CHARGE
Under £400 £50 ex. VAT
Over £400 ex. VAT £35 ex. VAT
Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
ORDER VALUE DELIVERY CHARGE
Under £300 £50 ex. VAT
Over £300 ex. VAT £35 ex. VAT

View Full Delivery Policy

Returns

We offer a 30 day returns policy on any faulty products.

View Full Returns Policy

Key Features

  • {{panorama_horizontal}} Adapts to various roof contours
  • {{air}} Withstands high wind uplift and mechanical stress
  • {{check_circle}} Suitable for both warm and cold roof systems
  • {{invert_colors}} Resists water penetration/ allows moisture vapour to escape

Technical Specification

Technical Specification
Width:1m
Length:50m
Sales Unit:Roll
Sales Unit Coverage:50m2
Brand:Cromar

Technical Downloads

What is Vent3 Classic?

Vent3 Classic is a premium triple-layer breather membrane crafted from high-tensile spun-bonded polypropylene and a micro-porous film. This innovative design resists water penetration while allowing moisture vapour to escape, delivering superior protection and durability for both warm and cold roof applications. Ideal for fully supported or unsupported tiled, slated, or metal roof systems, Vent3 Classic combines high vapour permeability with a robust waterproof barrier.

Triple Layer Construction

The outer layer forms a waterproof surface, the middle layer serves as a breathable barrier, and the inner layer protects against abrasion while adding extra strength. Whether it’s draped unsupported over rafters or laid directly over insulation, Vent3 Classic is engineered to meet the highest standards of durability and performance.

Applications

  • Tiled Roofs: Provides a breathable yet waterproof barrier beneath tiles.
  • Slated Roofs: Ideal for protecting the roof structure while allowing moisture to escape.
  • Metal Roof Systems: Enhances performance by reducing condensation and ensuring longevity.
  • Unsupported Installations: Perfect for draping over rafters, ensuring ease of installation and effective moisture management.
  • Direct Over Insulation: Lays directly on top of insulation without compromising its effectiveness.


Benefits

  • Triple Layer Membrane: Combines three layers for enhanced waterproofing and breathability.
  • Lightweight and Flexible: Facilitates quick installation, adapting easily to various roof contours.
  • Excellent Tensile and Tear Strength: Withstands high wind uplift and mechanical stress.
  • Waterproof Membrane: Provides robust protection against water penetration.
  • Long Term Durability: Designed to last, ensuring continued performance over the roof’s lifespan.
  • UV Stable: Maintains performance after up to 4 months of exposure.
  • Versatile for Roof Applications: Suitable for both warm and cold roof systems.
  • No Additional Ventilation Required: Engineered to manage moisture without extra ventilation systems.


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