Damp Proof Course: Key Characteristics

A Damp Proof Course (DPC) is essential in construction to prevent moisture from rising through walls via capillary action. It acts as a barrier, typically installed horizontally within the masonry.

Analyzing Damp Proof Course Options

• Option 1: Measured in cubic meter. This is incorrect. DPC is a layer applied over an area or along a length, not a volume. It's typically quantified in square meters (area) or running meters (length).
• Option 2: Measured in running meter. While DPC has length, and is sometimes estimated this way, its primary quantification often involves area (length x width/thickness), making 'running meter' potentially incomplete on its own.
• Option 3: Not provided at sills of doors. This is the correct statement. The main DPC is installed at the plinth level to stop ground moisture. While DPC material might be integrated under door frames to prevent surface water issues, the primary horizontal DPC barrier is positioned below the door sill level and doesn't extend *to* the sill itself. The sill is designed to handle surface water and typically relies on its own slope and material properties.
• Option 4: Provided for half the width of the plinth wall. This is incorrect. A DPC must span the entire width of the wall to be effective, preventing moisture ingress from any side.

Conclusion on Damp Proof Course

Based on standard construction practices, the primary Damp Proof Course is installed to prevent rising damp from the ground. It is not fundamentally located or provided *at* the level of door sills, which are primarily concerned with surface water management.