ISOLINE LOW LINE underlay panels are used as a secured waterproofing layer, under the tiled roof. This solution is a perfect waterproofing barrier against potential leaks, that may happen over time through a breach in the tiles covering.
ISOLINE LOW LINE is made from the same material as the ONDULINE CLASSIC sheet, but with the added benefit of having 24 mm deep corrugations making it the perfect product for roof underlays.
Bitumen is also one of the most well used raw materials in the roofing industry, thanks to its perfect sealing performance. Cellulosic fibres derived from wood give the Onduline roofing sheets their strength.
The Onduline roofing material is manufactured using 50-60% recycled cellulose fibres, so is also good for the environment