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View Product ReviewsCromar Vent 3 Classic Breather Membrane Felt Underlay 1.5m x 50m (75m2/Roll)
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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.
Nationwide Delivery
Thu 27 Mar
- 0days
- 22hrs
- 51mins
- 58secs
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- Choose PayPal at checkout to pay later with Pay in 3.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Pay in 3 is a form of credit, so carefully consider whether the purchase is affordable and how you will make the repayments. Be aware of the possible impact of using Pay in 3 and of missing payments, including making other borrowing more difficult or more expensive. Pay in 3 eligibility is subject to status and approval. 18+ UK residents only. Available for purchases of £30 to £2,000. Terms and conditions apply. PayPal Pay in 3 is a trading name of PayPal (Europe) S.à r.l. et Cie, S.C.A. 22-24 Boulevard Royal L-2449, Luxembourg.
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Buy now. Pay with Klarna at your own pace.
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Klarna's Pay in 3 is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
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- At checkout select Klarna.
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- Different payment plans may be shown depending on the purchase amount and credit score.
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Split your purchase of £62.00 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
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third payment
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fourth payment
How it works
- Choose Clearpay at checkout to pay later with Pay in 4.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
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.
Klarna's Pay in 3 / Pay in 30 days are unregulated credit agreements. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Late fees may apply. Ts&Cs apply
Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/apply
Delivery & Returns Information
All delivery charges are shown in your basket and are dependent on the total value of items in your basket based on product category.
This charge is based on delivery to mainland UK excluding the following postcodes: AB, DD, DG, KW, IV, LD, LL, PH, SA and SY. If your delivery address is in any of these postcode areas a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.
Standard (Nationwide) Delivery
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | ||
|---|---|---|
| ORDER VALUE | DELIVERY CHARGE | |
| Under £250 | £20 ex. VAT | |
| Over £250 ex. VAT | FREE | |
| Insulation, Plasterboard and Drylining Products | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Under £150 | £50 ex. VAT | |
| Between £150 - £400 ex. VAT | £35 ex. VAT | |
| Over £400 ex. VAT | FREE | |
| SuperFOIL and YBS products | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Each item | £10 ex. VAT | |
| Over £350 ex. VAT of 1 brand | FREE | |
| Paving Stone Products | ||
| DELIVERY CHARGE | ||
| FREE | ||
| Screws & Fixings and Adhesives & Sealants | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Under £100 | £7.50 ex. VAT | |
| Over £100 ex. VAT | FREE | |
| Thermafleece CosyWool Roll & SupaSoft Insulation | ||
| QUANTITY | DELIVERY CHARGE | |
| 1 | £30 ex. VAT | |
| 2 | £60 ex. VAT | |
| 3 to 12 | £70 ex. VAT | |
| 13 to 24 | £140 ex. VAT | |
| 25 to 36 | £210 ex. VAT | |
| 37 to 48 | £280 ex. VAT | |
| 49 to 60 | £350 ex. VAT | |
| 61+ | £420 ex. VAT | |
| Thermafleece CosyWool Slab, Thermafleece UltraWool & Thermafleece NatraHemp | ||
| QUANTITY | DELIVERY CHARGE | |
| 1 | £30 ex. VAT | |
| 2 | £60 ex. VAT | |
| 3 to 4 | £70 ex. VAT | |
| 5 to 8 | £140 ex. VAT | |
| 9 to 12 | £210 ex. VAT | |
| 13 to 16 | £280 ex. VAT | |
| 17 to 20 | £350 ex. VAT | |
| 21+ | £420 ex. VAT | |
| Block Pavers | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Under £100 | £17.50 ex. VAT | |
| Between £100 - £200 ex. VAT | £30.50 ex. VAT | |
| Between £200 - £900 ex. VAT | £105 ex. VAT | |
| Over £900 ex. VAT | FREE | |
| Artificial Grass | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Under £100 | £12 ex. VAT | |
| Between £100 - £200 ex. VAT | £16.50 ex. VAT | |
| Over £200 ex. VAT | £22 ex. VAT | |
| Doors and Feature Panelling | ||
| QUANTITY | DELIVERY CHARGE | |
| 1 to 2 | £35 ex. VAT | |
| 3 to 4 | £45 ex. VAT | |
| 5+ | £60 ex. VAT | |
|
* Deliveries of Doors and Panels to Scotland may incur additional costs and may have an extended delivery time of an additional 3 working days. Delivery to the postcodes below will be charged an additional delivery fee. Our customer service team will reach out to you if you order requires an additional delivery charge. This will be calculated based on the difference between the standard cost charged and the total cost outlined below:
Postcodes: KA1-29, IV1-39, AB, PH1-41, DD, PA1-19, KY, FK, FK15-21 - £90 ex VAT (total delivery cost) |
||
| Ironmongery | ||
| DELIVERY CHARGE | ||
| 1+ | £16.50 ex. VAT | |
| Specialist Products | ||
| DELIVERY CHARGE | ||
| 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 |
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: | 1.5m |
|---|---|
| Length: | 50m |
| Sales Unit: | Roll |
| Sales Unit Coverage: | 75m2 |
| 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.
