Khoo Teck Puat Hospital – Singapore
To provide waterproofing membrane protection prior to casting and under-screed drainage to allow entrapped water in the screed to discharge and prevent moisture and salts below the sheet from migrating to the surface.
VersiDrain 6P sheets, installed prior to casting over the waterproofing membrane, offer immediate protection against inadvertent membrane penetration or damage due to installation of various services on the roof. Insulation boards were positioned over VersiDrain 6P and covered with geotextile fabric followed by a reinforcing wire mesh on top. The capillary break created by the sheets between structural slab and topping screed prevents water and salts in the screed from migrating upward minimising efflorescence and also reduces possibility of cracking on the surface.