Rising damp is prevented by isolating the concrete from any water source. The following diagram provides details:

With impermeable sub soils (such as clay or rock), a 3 - 4" granular drainage layer must be placed under the footing to prevent wicking and provide a water pathway to the adjacent drain tile.

Permeable sub soils such as gravel do not require a drainage layer under the footing.

Install the footing membrane as per the manufacturer's instructions. All joints should be lapped a minimum of 8".

The bottom edge of the wall membrane must be lapped over the footing membrane to ensure water is directed away from the footing and into the drainage layer below. The inside footing member should be cutaway to provide an exit for any water that may enter.