Cromar VENT 3 AIR 165gsm Air Permeable Roofing Membrane – 1m x 50m

Original price was: £126.54.Current price is: £112.98. Inc VAT

40 in stock

Direct Delivery
Rapid Delivery: 1 to 3 Working Days

 Nationwide Delivery

Rapid Delivery: 1 to 3 Working Days

Delivery costs are calculated in the checkout based on products and delivery address.

To read more about our delivery service click here.

Rapid Delivery: 1 to 3 Working Days
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Product Description

Cromar VENT 3 AIR 165gsm Air Permeable Roofing Membrane – 1m x 50m

Cromar VENT 3 AIR has the ability to allow air to pass through while blocking the passage of water. It is specially designed to have a high degree of air permeability while remaining watertight. VENT 3 AIR has a waterproof layer that prevents water from entering the roof structure. This helps prevent condensation within the roof structure, which can lead to rot, mould, and reduced insulation efficiency.

When the NHBC issued the revision to Part L Section 7: Air permeability and pressure testing, this meant a change for both membrane manufacturers as well as the contractors on site. The introduction of a minimum level of air permeability within a dwelling which is outlined in the section brought a need for better-performing breather membranes within the roof space. The build-up of interstitial condensation can (more commonly in the winter months, or during the drying out period of a build) be a problem to contractors and homeowners and evidently have an effect on the build itself. This was more prominent in unsupported cold roof applications where there was a natural environment for moisture, meaning a membrane accompanied by additional mechanical ventilation, particularly at ridge level was recommended, we believe we have a solution without the need for additional ventilation.

Cromar has been working tirelessly to develop a breather membrane that is not only affordable to a diverse market but also technically superior with its performance with being both vapour permeable and air open.

Why choose Cromar VENT 3 AIR 165gsm Air Permeable Roofing Membrane…

The use of VENT 3 AIR roofing membranes can lead to several benefits, including improved energy efficiency, reduced risk of moisture-related issues, increased roof lifespan, and enhanced indoor comfort.

Key Features of Cromar VENT 3 AIR 165gsm Air Permeable Roofing Membrane:

  • Available in 1m width rolls
  • UV and water-resistant
  • Excellent hydrophobic qualities
  • >66 m3/m2/hr @ 50 Pascals to BS EN 12114
  • No vapour control layer needed
  • Eliminates the need for additional ventilation
  • For use under tiles and slates as a pitched roof underlay
  • Compliant for use in zones 1-3 on a 345mm battened lap – without the need for taping.
  • Weight: 165gsm
  • Colour: Orange
  • Technical Data Sheet: Click Here

Additional information

Weight 8.25 kg

Delivery Costs

At Roofin Online, we offer Everyday Low Prices across an ever-expanding range of roofing and construction materials online. We offer a fast and direct nationwide delivery service, utilising an efficient mix of couriers, haulage and manufacturers’ transport, enabling us to offer competitive prices to our customers.

This means that our delivery costs are calculated in the basket and checkout, as they depend on the products (i.e. brand, quantity, weight, length etc) and the delivery address.

Delivery costs are based on delivery to a single address within the UK Mainland, excluding the Scottish Highlands and Islands where additional costs may apply.

Please see examples of our delivery costs below:

Standard Parcels from £5.95

Small items, such as Ridge Kits, Dry Verge Units and Small Gutter Components etc.

Long Items from £12.00

Long items, such as Cavity Closers, Membranes, Guttering, Continuous Verge and Pipe etc.

Palletised Delivery from £40.00

Heavier products like roof tiles, lead rolls, paving etc require palletised delivery.

Clear Amber Delivery

Orders under £200 + VAT = £40.00 + VAT
Orders over £200 + VAT = £30.00 + VAT

Specialist dedicated transport for large items like roof sheets (Corrapol, Axiome, Axgard, Alukap-XR, Alukap-SS, Snapa, Aluflow and Alupave).

Delivery Updates

When Ordering: We give estimated delivery times upfront on the individual product pages. These delivery times are given in standard working days, which are Monday to Friday from 09:00 until 17:00 (excluding Bank Holidays). After Ordering: We will provide you with more accurate delivery updates after we have processed your order, the information provided will depend on the delivery service that’s available for the products you order and will be sent to the email address you enter during checkout. We may provide a planned delivery date, tracking information or simply further instructions if updates are to come directly from a supplier or delivery partner. Before Delivery: Deliveries are made on commercial vehicles up to 18-tonne rigid lorries, so please let us know about access restrictions, safe places and further instructions ASAP, as failed deliveries may incur additional costs, especially for bulky or palletised deliveries. During Delivery: Small items will be delivered to your door via courier, however, bulkier items, will require a specialist or palletised services. Palletised deliveries will be made on a lorry equipped with a tail-lift and pallet truck, so the driver will unload your order and place it at the nearest road access point to the delivery address (kerbside delivery). The delivery drivers will not provide labour and physically move the building materials to where you need them, so please ensure that somebody with the ability and willingness to handle the goods accepts the delivery. Please keep in mind that if you order in the evening, a weekend or on a bank holiday then your order will be processed by a member of our team the next working day. For example, if you order at 6 pm on Friday, and the products are on a 1-3 Working Day delivery time. Then you will receive delivery updates when your order is processed/dispatched the following Monday, meaning that Tuesday would be delivery day number 1. You can read more about our delivery service by visiting our delivery information page.
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