An underroofing / roofing underlay system for traditional tiles. Smart waterproofing, long term serenity!

Designed to be used under clay, slate or concrete tiles, ISOLINE systems are engineered to be 100% leak free for new buildings and renovations and are perfect for projects requiring very low pitches. ISOLINE provides a durable waterproofing (30 years guarantee) even on low pitched roof (15% min). Installation is fast and safe: Easy carrying, handling and fixing thanks to its light weight, non-slippery sheets that are easy to cut.

ISOLINE range delivers durable protection to any building, offering complete peace of mind to your customers and to you. ISOLINE fits all tile shapes and adapts to each roof structure. The fast weatherproofing and installation saves you time and peace of mind on jobsites.

Would you have a question or need an advice, please contact us.

ISOLINE LOW LINE Underlay system for low pitched roofing


BBA certified underlay roofing system for pitches as low as 10 degrees for any roof tile. (2000mm x 1010mm)


Onduline materials are used by many roofing, cladding and waterproofing professionals: discover their projects and find out what they have to say.