Vent 3 Air 50m x 1m

VENT3® 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. VENT3® 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, mold, and reduced insulation efficiency.

Over the past 18 months we at Cromar have 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.

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   section brought a need for better performing breather membranes within the roof space           particularly. 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 home owners 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.

The NEW Vent 3 Air breather membrane will tick all the boxes for specifiers, distributors and contractors alike.

VENT3® AIR – 165gsm
The use of VENT3® 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

¨ 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.