A horizontal layer of impervious material laid in a wall to exclude water usually at 6" (15 cm) above ground level. A damp proof course subsequently installed in an older property will usually take the form of a series of chemical injections into the brickwork.
a horizontal layer of impervious material incorporated into the walls near ground level so as to prevent ground moisture from rising into the brickwork
a strip of impervious material the same width as a brickwork or blockwork wall, to keep out moisture
A layer of impervious material built into a wall to prevent damp rising or descending through it.
An impervious membrane laid about two brick courses above ground level to prevent damp from rising.
Often referred to by builders as BPC, the damp proof course is the moisture barrier that is fitted into the brickwork just below the floor level of the building. This membrane stops the transition of water from rising through brick or blockwork where it can cause rot and other forms of damage and discomfort. There have over the years been various materials used for this task such as lead, bituminous rolls, aluminium cored plastic etc.
Course Layer of impervious material (mineral felt, pvc etc) incorporated into a wall to prevent dampness rising up the wall or lateral dampness around windows, doors etc. Various proprietary methods are available for damp proofing existing walls including "electro-osmosis" and chemical injection.