Methods of Damp-proofing

Damp-proofing courses (DPC) of suitable materials are provided at appropriate locations for their effective use (Sharma, 1988). DPC prevents basically the entry of the water from ground in buildings. The best position for DPC is the plinth level in buildings.

Following general principles should be adopted while providing DPC in buildings:

1. DPC should cover the full thickness of the wall.
2. Mortar bed on which the DPC is laid should be level and there should not be any projection.
3. In places where a vertical DPC is provided, it is to be laid continuously with a horizontal DPC and a fillet.
4. DPC course should be continuous and should form as a bearer from the entry of moisture.
5. DPC should not be exposed in total.