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View Product ReviewsCromar Vent 3 Classic Breather Membrane Felt Underlay 1m x 50m (50m2/Roll)
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Nationwide Delivery
Wed 23 Jul
- 2days
- 13hrs
- 57mins
- 53secs
Product Overview
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 | |
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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 | |
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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 |
Returns
We offer a 30 day returns policy on any faulty products.
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
Width: | 1m |
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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.