ISOLINE
Low pitch roofing system to ensure waterproofing and thermal comfort.



Engineered to be 100% leak free, ISOLINE roofing underlays deliver long-lasting waterproofing to any building, offering complete peace of mind to professionals and home owners.
ISOLINE is lauded for both for its excellent quality and durability, as well as for its simple and fast installation.
ISOLINE roofing underlay work with any type of roof tiles. Whether it be flat or curved, clay or concrete ISOLINE is the ideal water proofing system. It van be used in both new constructions and renovation. When renovating a building, part of the original tiles can be reused to preserve the building’s aesthetics.
The wavy format of the ISOLINE roofing underlay creates a double ventilation circuit on the roof, which prevents humidity due to condensation.
ISOLINE roofing underlays not contain asbestos or any component that is harmful to health. They are made up of more than 50% recycled material and have a positive carbon footprint of only 4,304 Kg CO 2 / m 2 . This means ISOLINE is a true Green Product.
Thanks to their high flexibility and lightness (3 Kg / m2) ISOLINE roofing underlays absorb structural movements and the expansion-contraction of the roof without breaking .
The roughness of the ISOLINE roofing underlay, together with their corrugations, provides a natural grip on curved tiles , greatly reducing the need for gripping material.
Lenght | 2000 mm |
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Width | 950 mm |
Thickness | 3 mm |
# Corrugations | 10 |
Height of corrugation | 38 mm |
Weight per m2 | 3.4 kg |
Weight per sheet | 6.4 kg |







Installation of ISOLINE is simple. No special tools are required apart from the usual ones in construction. ISOLINE can be fixed on metallic as well as wooden battens. You can fix ISOLINE using a hammer or electrical drilling machine. The appropriate type of fixing must be used for each type of roof support.
You can get in touch with ONDULINE TEAM for technical assistance and queries.

Historical Renovation - Former Departmental Archives, Nîmes, France, with Onduline Underroofing