General Overview

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Product Benefits

Peace of mind on every site: quick and durable waterproofing
Fast installation: Easy to install and tile over
Dry installation : Save manpower cost and materials
Adapts easily to each roof structure: adaptable to roof shape, ideal for renovation, suitable for low pitched roofs (15% min)
Suitable for any type of tile
Pitch can be as low as 10 degrees
Quick weatherproofing
30-year warranty

ISOLINE LOW LINE: Market leading underlay for low pitched roofs

The most reliable waterproofing solution for very low pitched roofs
The low profile configuration of ISOLINE LOW LINE, makes it the perfect underlay solution for a reduced roof section making it ideal for projects on which the height restriction or the aesthetic appearance of the roof line is of prime importance.

Engineered to be 100% leak free, ISOLINE LOW LINE roofing underlays deliver long-lasting waterproofing to any building, offering complete peace of mind to professionals and homeowners. ISOLINE LOW LINE acts as a roof under the roof. 

ISOLINE LOW LINE roofing underlay sheets work with any type of tiles
ISOLINE LOW LINE compliments and enhances the performance and reliability of traditional tile or slate roofs. The ISOLINE LOW LINE underlay system can be used in both new constructions and renovation to keep the aesthetics of the original heritage of a building, whilst acting as the primary waterproofing material and protection for the building.

Innovation of ISOLINE LOW LINE 
The innovation of ISOLINE LOW LINE has provided opportunities to allow roofing tiles and slates to be laid below the manufacturers minimum recommended roof pitch with confidence. With this type of underlay technology, roofs can be designed with lower pitches, allowing you to use any type of tile or to deliver more usable floor area. 



ISOLINE roofing underlay sheets are provided with a 30-year waterproofing warranty going along with the respect of our installation guidelines and the use of ONDULINE accessories.

For additional ventilation, use ONDUTISS AIR permeable membrane.

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