Damp proof membrane

Hot poured bitumen

• A continuous layer of hot applied bitumen is poured on the surface and spread to a thickness of not less than 3mm
• The surface of the concrete bed should be brushed to remove dust
• Properly applied bitumen layers serve as an effective DPM both horizontally and spread up inside wall faces to unite with DPC in walls

Cold-applied bitumen/Rubber emulsions

• These cold applied solutions are brushed onto the surface of concrete bed in 3 coats to a finished thickness of not less than 2.5mm , allowings each coat to harden before the next is applied

Mastic asplhalt /pitch mastic

• Could be dual-purpose finish and damp-proof membrane
• These material are spread hot and dinished to a thickness of at least 12.5mm
• This expensive damp-proof membrane is used where there is appreciable water pressure under the floor