AV 5+1 Drainage System

High-performance CE-marked drainage system with an innovative dimple design made out of recycled high impact polystyrene. The core of the AV Drainage System is a perforated, vapour-permeable dimpled sheet with a high compressive strength, a construction height of approx. 27.5 mm and a water reservoir of approx. 5.8 l/m². A non-woven geotextile is glued to the back of the dimpled sheet as a filter layer and a vapour-permeable geotextile is bonded to each dimple as a protection and separation layer. Application The AV 5+1 Drainage System is a component of the Nophadrain Extensive Green Roof System and the Nophadrain Intensive Green Roof System that acts as a filter, drainage, protection and separation layer. The AV 5+1 Drainage System is suitable for roofs with limited falls. The construction height (approx. 27.5 mm) prevents waterlogging in the substrate layer and the risk of frost heave affecting the paving and allows longer drainage length. The AV 5+1 Drainage System is suitable for warm roof and inverted roof constructions. Properties • Material dimpled sheet: recycled high impact polystyrene (HIPS) • Material geotextile filter: polypropylene (PP) • Material vapour-permeable geotextile: polypropylene (PP) and polyethylene (PE) • Construction height: approx. 27.5 mm • Compressive strength: approx. 500 kPa • Perforations/m²: approx. 575 / ø 15.8 mm • Water Reservoir: approx. 5.8 l/m2 • Weight: approx. 1,243 g/m² • Drainage capacity at i = 1 at 20 kPa: approx. 15.70 l/(s.m) • Drainage capacity at fall ratio 2 % at 20 kPa: approx. 2.14 l/(s.m)