The single-ply dimpled membrane is a water-storing, perforated dimpled membrane in sheet form and is recommendable as an ideal solution for intensive roof greening

Advantages:

• Compared to conventional green roof products, it offers many times the drainage and water storage capacity and assumes the function of an extremely high-performance drainage and water storage layer in intensive green roofs
• The 40 mm and 60 mm high dimples have a water storage capacity of approx. 15 L/m² and 20 L/m². This allows the optimal installation of green areas designed to do without irrigation for extended periods
• The pressure resistance of approx. 200 kN/m² boasts a striking level of security, thereby corresponding to a compressive strength of approx. 20 tonnes per m²
• The dimpled membrane has an unusually high drainage capacity of i = 0,01; approx. 0,89 L/s·m and 2,93 L/s·m, allowing it to be used for very large drainage lengths and/or very low roof slopes
• The plant substrate can be applied directly on the dimpled membrane after laying a separate geotextile
• Thanks to the perforation, the water-storing drainage element is permeable and can also be used for inverted roofs; this prevents a film of water from forming on the inverted roof insulation. In walkable areas without vegetation, no geotextile is used
• The base layer and the bedding material can then be applied directly on the dimpled membrane without changing the material. Then the pavement or slab covering can be laid on top of it

Installation:

• The waterproofed surface must be thoroughly cleaned so that no damage can occur to the waterproofing after laying the drainage membrane
• Then lay a non-woven fabric as a protective and separating layer with at least 300 g/m² on the waterproofing
• The drainage membrane is laid horizontally with the dimples to the surface and the dimple openings facing upwards. Connect the sheets by butt joints
• The dimpled sheet can be cut to the required length with a knife, but the waterproofing may not be damaged
• The dimpled sheets are laid step by step
• A geotextile is then installed as a filter layer over the laid surface, and the plant substrate can be applied directly