BAC Canalis are moulded polypropylene boards, designed to retain water below the growing medium on extensive roofs where the soil thickness is at a minimum. On slopes, it is necessary to provide a barrier to resist slippage.

General information

Uniclass 2015

Pr_25_71_63_24 Drainage layer corrugated boardsPrimary


Q37/350 Drainage layer

Specification data - Drainage layer corrugated boards

Product Reference

BAC Canalis

Standard product features


598 x 380 mm.

Maximum flow rate:

20 litres/m².


Extensive and Intensive Green Roof Technology

Extensive and Intensive Green Roof Technology

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