Drainage

Protecto-Drain 20P

Heavy duty HDPE dimpled drainage board with drainage holes – suitable for green roofing

Suitable for extensive green roof systems including sedum roofs, wildflower and biodiverse roofs, grasses and dwarf plants, with substrates up to a depth of 200mm
For use on structural decks which have been fully waterproofed, protected and are capable to holding the weight of a saturated green roof
Lightweight, tough yet flexible and can be shaped around objects
Holds water within its profile to nourish vegetation above the filtration layer (5 litres per m2)
Does not pollute the water run off

Project Enquiry Specification

Application

Laid horizontally onto geotextile filtration fabric beneath, with cups facing up
Membrane overlapped and covered with loose laid geotextile filtration layer above, separating substrate from HDPE membrane
Growing medium / substrate is laid on top
Provides air gap to allow free-drainage of water
Slows run-off of water but prevents waterlogging
Water held in reservoir cups can be drawn up back into the substrate in dry periods
Excess water dissipates through the perforations between each cup and through the drainage channel out into the outlet

Handling

Supplied in rolls 2 x 20m
Easy to transport and install
Multiple sheets can be clipped into place by overlapping the cups and sealing joints with adhesive tape

Part of a comprehensive drainage system for roll-out extensive green roof systems. Designers need to be sure that the storage capacity and drainage flow rate is sufficient for the green roof type being constructed.

It is important to remember, however, that these materials do not alone provide a drought resistant system. Irrigation in dry or hot weather and regular maintenance is required for all roof gardens and green roofs.

Storage

Protect against prolonged exposure to direct sunlight and temperatures over 25 °C

Please see our green roof pages here Green Roof Systems for more details.

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.

Protecto-Drain 20P Technical Data

Technical features	Technical data	Test Method
Material	High-density polyethylene (HDPE)
Roll width	2 metres	calibrated measuring tape
Roll length	20 metres	calibrated measuring tape
Roll weight	550 gsm (±10%)	calibrated thickness-measuring tape
Rolls per pallet	5
Compression strength	180 kN per m2	MDV
Height of cups	20mm	MDV
Air volume between the cups	14 litres per m2	MDV
Water drainage capacity	10 litres per m2	MDV
Temperature tolerance	– 30°C to + 80°C	MDV
Reaction to fire	B2 (B1 available by special request)	DIN 4102
Physical characteristics	Rot-proof, resistant to fungus and bacteria. Will, not leach chemicals. Not harmful to drinking water. No health hazards under normal use
APPLICATION