Breathable roofing membrane underlay Vent3 PRO is a heavyweight, high performance underlay for cold and warm roof application. It has a weight of 165gsm.
This is the highest rated breathable roofing membrane underlay in our range with a BS5534:2014 Wind Uplift rating of zones 1-4 with a 345mm lap fixing batten, and zones 1-5 with the addition of our Vent3 Double sided breather tape. With a 250mm or 100mm Lap fixing batten Vent3 Pro will reach zones 1-5.

• BBA Certified
• Cold & warm roof application
• 3 Layer spun-bonded membrane
• Clean & easy to use
• Heavyweight performance & flexibility
• Excellent tensile strength
• Green surface prohibits glare
• No gusting wind noise
• UV stable for up to 3 months
• Excellent nail tear resistance