Going With the Flow | 11 Jun 2007 |
Ideally suited to roof gardens or patio areas sitting immediately above a room, Delta-TERRAXX is a robust protection and drainage system from Delta Membrane Systems.
It features a dimpled sheet with a fused-on geotextile to form a highly effective drainage layer. Facing up, the geotextile acts as a filter protecting the air gap created by the dimpled sheet underneath.
Under a covering of gravel, chippings or soil, the heat-bonded permanent filtration geotextile keeps the dimple structure from being clogged up by sludge, ensuring that any excess water is drained away completely.
The integrated self-sealing edge makes the dimpled sheet easy to install, and helps prevent root penetration, while the smooth backing ensures that any impinging loads are distributed evenly across the waterproofing surface.
The added benefit of this material is that it allows workers to walk on any compression-resistant waterproofing layers during the construction phase, while at the same time protecting the waterproofing from mechanical damage and harmful exposure to heat.
Capable of withstanding extreme compression loads – up to 400kN/m2 – Delta-TERRAXX can be installed at depths of up to 10m. It also offers a high drainage capacity, which prevents frost damage and encrustation.
Water vapour pressure is drained away through the structure, with the water drainage capacity being 3.1 litres/sec. – exceeding that of the gravel or chipping layers.
The dimpled sheet comes in HDPE silver finish, with the dimple height being 9mm, creating an air gap of 7.7 litres/m2.
Delta-TERRAXX is supplied in 12.5m x 2.4m rolls.
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