Types Of DPC and its Thickness used?

Damp Proof Course (DPC) is a barrier incorporated into buildings to prevent the upward movement of moisture from the ground into the building structure. Various types of materials are used for DPC, each with its own advantages and suitable applications. The thickness of DPC typically depends on factors such as the type of material used, the level of moisture protection required, and local building regulations. Here are some common types of DPC and their typical thicknesses:

1. Bituminous DPC:
   • Bitumen-based materials such as asphalt, bituminous felt, or bituminous membrane are commonly used for DPC.
   • Typical thickness: 2 to 4 millimeters (mm) for bituminous felts and membranes.
2. Polyethylene DPC:
   • Polyethylene sheets or membranes are popular due to their flexibility, durability, and resistance to moisture.
   • Typical thickness: 0.2 to 0.5 millimeters (mm) for polyethylene sheets and membranes.
3. Metal DPC:
   • Metal sheets or trays made of materials such as lead, copper, or aluminum can be used as DPC in certain applications.
   • Typical thickness: 0.5 to 1 millimeter (mm) for metal sheets or trays.
4. Cementitious DPC:
   • Cement-based materials such as mortar, cement slurry, or cementitious compounds can be applied as a DPC layer.
   • Typical thickness: 25 to 50 millimeters (mm) for cement mortar or slurry applied in multiple layers.
5. Plasticized PVC DPC:
   • PVC (polyvinyl chloride) membranes with plasticizers added for flexibility are widely used for DPC.
   • Typical thickness: 0.5 to 1.5 millimeters (mm) for plasticized PVC membranes.
6. Rubberized DPC:
   • Rubber-based materials such as EPDM (ethylene propylene diene monomer) or neoprene can be used for DPC.
   • Typical thickness: 0.5 to 1 millimeter (mm) for rubberized membranes.
7. Copper DPC:
   • Copper sheets or strips can be used as DPC, especially in historic or high-end construction projects.
   • Typical thickness: 0.5 to 1 millimeter (mm) for copper sheets or strips.

The choice of DPC type and thickness depends on factors such as the local climate, site conditions, building design, and budget constraints. It is essential to consult with building professionals or adhere to local building codes and regulations to determine the most suitable type and thickness of DPC for a specific construction project. Additionally, proper installation and integration of DPC into the building envelope are crucial to ensure effective moisture protection and long-term durability of the structure.