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Drainage
Protecto-Drain 40P
The 40mm dimpled drainage layer is commonly used in green roof installations to manage water retention and drainage. The drainage layer is made from high-density polyethylene (HDPE), which features dimples that create air gaps which facilitate aeration of the soil.
The 40mm is suitable for more robust, intensive green roof systems, intended to support a more diverse plant range, including shrubs, rather than just sedum or turf grass. However, it can be used for Sedum or Wildflower green roofs where substantial substrate has been specified.
Used as a mechanical protection against soil and root movement along foundation walls. It can be installed with a 20cm overlap and fixed with nails and sealing buttons 5 cm from the top edges of the roll and 20cm from each roll. Edging profile is installed to prevent soil ingress into the cavity. Maximum build-up 8 metres high.
Laid horizontally and fixed using sealing tape in the overlapping areas the sheets protect concrete flooring form rising damp and keep reinforcement mesh in place firmly during the concrete works.