1 x 50m Cromar Vent3 Light Breathable Roof Membrane
Protect your roof from the elements while helping to prevent condensation with Cromar Vent3 Light Breathable Roofing Membrane. This lightweight, high-performance roofing underlay provides an effective waterproof barrier beneath roof tiles and slates while allowing moisture vapour to escape from the roof structure.
Manufactured from three layers of spun-bonded polypropylene with a microporous film, Vent3 Light combines excellent breathability with reliable strength and durability. Its flexible, lightweight construction makes it easy to handle and install, making it a practical choice for both professional roofers and DIY projects.
Suitable for both warm and cold pitched roof applications, this versatile breather membrane can be installed on fully supported or unsupported roof structures. Its breathable properties help manage moisture within the roof space, reducing the risk of condensation and associated timber deterioration.
Supplied in a convenient 1m x 50m roll, Cromar Vent3 Light offers an economical and dependable solution for new roofing installations, extensions and refurbishment projects.
Key Features & Benefits
Breathable and waterproof – allows moisture vapour to escape while providing secondary protection against rain and wind
Lightweight 95gsm construction – easy to transport, handle and install
Triple-layer membrane – durable polypropylene construction for reliable performance
Suitable for warm and cold roofs – versatile use across pitched roof applications
Excellent tensile and tear strength – designed to withstand normal installation demands
BBA certified – independently assessed for roofing applications
UV resistant – suitable for temporary exposure for up to 3 months, subject to installation conditions
Flexible and easy to cut – ideal for new builds, extensions and roof repairs
Typical Applications
Pitched roofs with concrete or clay tiles
Natural and artificial slate roofs
Warm and cold roof constructions
New-build houses and extensions
Roof replacements and refurbishment projects
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Cromar |
| Product | Vent3 Light |
| Roll Size | 1m x 50m |
| Nominal Coverage | 50m² before overlaps |
| Membrane Weight | 95gsm |
| Construction | Triple-layer polypropylene |
| Colour | Dark Grey / White |
| Water Vapour Resistance (Sd) | 0.02m |
| Water Resistance | W1 |
| UV Resistance | Up to 3 months |
| Certification | BBA Certified |
| Application | Warm and Cold Pitched Roofs |
