Onduline® Underroofing is a waterproofing system for roofs that guarantees total weather tightness (30-year guarantee), even in low-pitched roofs (min. 10% pitch). In addition, the corrugation of the sheets provides ventilation channels that prevent roof condensation and damp.
Onduline® Underroofing sheet DRS BT-200 is suitable for roofs with:
Curved roof tiles (Spanish) with widths over 22cm.