The mixture for Damp Proof Course (DPC) at the plinth level is typically Concrete 1:2:4 mix or 1:1½:3 mix.
This indicates the ratio of cement, sand, and aggregate used in the concrete mixture. For example, in a 1:2:4 mix:
- 1 part is Cement
- 2 parts are Sand
- 4 parts are Aggregate (gravel or crushed stone)
Similarly, in a 1:1½:3 mix:
- 1 part is Cement
- 1½ parts are Sand
- 3 parts are Aggregate
These concrete mixtures are designed to create a durable and impermeable barrier against moisture rising from the ground into the building structure. Other materials like trap rock and slates can be used with a cement mortar mix of 1:3.
