Onduline Ondutiss Air 140 is a durable, high-vapour breathable membrane for use under various roofing materials in cold or warm roof constructions. Supplied in a 50m roll, Ondutiss Air 140 is easy to transport and just as easy to install.

• 140 gsm – 1m breathable membrane supplied in a 50m roll
• High vapour permeability – for cold and warm roof applications
• Robust and durable – high resistance to stretching or tearing
• Weather protection – secondary layer of protection against driving rain
• Fast and easy installation – overlap indicators printed on membrane
• BBA-certified – peace of mind for a high-quality installation

This item will be delivered directly by our supplier. Lead times are shown on the product and trolley pages and are always advertised in working days (Monday to Friday).

• If your order contains items stocked by us and items that come direct from the supplier, your order will be automatically split and processed accordingly.
• We will pass the details you give us, including delivery details, your email address and your phone number, to the relevant supplier.
• Most of our suppliers can deliver to any UK address. Delivery to remote or offshore postcodes may take a little longer than the advertised lead time. If the supplier cannot deliver to your postcode or we believe your order may take longer, we will try to tell you beforehand.
• Items that come direct from a supplier will be delivered by the courier chosen by the supplier. Where possible, suppliers will update you with delivery information. This may be by email, phone call or text message.
• Items delivered direct from suppliers cannot be returned through a store. You would need to return these items direct to the supplier, unused and in their original packaging, at your expense. You can arrange for most items to be collected by contacting our Customer Services team. A fee of £9* will be taken off your refund. There is no charge for faulty items being collected. *For big and bulky items, additional charges may apply.
• Please note, you cannot return bespoke or made-to-measure items unless they are faulty.