Sentosa, Singapore


To provide slope stabilisation for plant media confinement to enable planting on the mushroom-shaped roof over the gymnasium and also on the steep slope of another roof of the seafront condominium.


VersiDrain® 25P water retention and drainage trays, facilitating water retention and serving as a base drainage layer, were installed and blanketed over with a layer of geotextile fabric. VersiWeb® panels were then installed with anchoring to the roof facilitated by strong metal rods embedded in the concrete. The honeycombed cells of VersiWeb® contain and confine the planting media on which a carpet of Sedum is planted. VersiWeb® uniformly distributes weight-bearing loads and prevents planting media and plants from being dislodged and sliding down the sloping roofs. Perforations in the VersiWeb® cell walls facilitate inter-cell drainage, preventing hydrostatic build-up.


The resultant green roofs are not only aesthetically pleasing but are also an effective shield against harmful UV rays from the intense tropical sun. The crown of vegetation protects and prolongs the lifespan of the waterproofing membranes on the roofs and also keeps the interior living spaces beneath them cool and comfortable.