VersiDrain® 25P

What is VersiDrain® 25P

VersiDrain® 25P is an interlocking plastic water retention and drainage tray designed to store and drain water under extensive green roof systems.

VersiDrain® 25P trays are positioned on the waterproofing membrane, covered with geotextile, growth media and plants. Water and soluble nutrients become stored in an array of mini reservoirs or cells and are returned to the soil, via capillary action for plant uptake, when required.

VersiDrain® 25P trays incorporate interconnected channels that allow water to flow between the reservoirs. Perforations in the channels allow excess water to flow to drainage outlets.

VersiDrain® 25P protects waterproofing membranes against damage and the high compressive strength effectively supports the weight of growing media, plant species and other weight bearing loads.

VersiDrain® 25P ideal for use under lightweight extensive greenroofs, the 8 litres/m2 of stored water reduces the reliance on irrigation.


VersiDrain® 25P water retention and drainage trays both store and drain water, ideal for:

  • Roof gardens
  • Planter boxes
  • Landscaped decks
  • Extensive Greenroofs

VersiDrain® 25P efficiently stores and drains water under green roof systems and landscaped areas

  • Interlocking lightweight trays that ensure stability
  • Flat underside reduces point loading on membrane
  • High strength trays (5t/m²) that withstand the weight of growth and plant media
  • Storage of 6.1 l/ m² of water for re-use
  • Drainage capacity of 0.8 l/m.s
  • Stores water and reduces reliance on supplementary irrigation
  • Drainage of excess water
  • Lightweight and easy to install
  • Protection of waterproofing membranes
Weight0.9 kg/m²
Sheet thickness1.0 mm
Overall height23 mm
Compressive strength50 kN/m² (5 t/m²)
Water storage6.1l/ m²
Drainage rate0.8l/m.s
Biological/chemical resistanceResistant to ground chemicals, rot, moulds, algae, bacteria and root penetration. Does not affect potable water
Fire resistanceB2 (DIN 4102)