The Public Health Act of 1875 set laws for ground-level damp proof courses in walls, all properties then should have been built with some form of damp proof course.
Most modern properties will have some form already installed and these protective materials are usually made from slate, bitumen or a plastic membrane and can decay. For example, it is possible for a damp proof course to crack due to subsidence or generally deteriorate over a period of time, allowing damp to rise through the walls. It is also possible for the damp course to be breached by rubble and debris within the cavity wall.
If you believe you may have an issue with your damp proof course (DPC) at your property then you should contact us immediately to arrange for one of team to survey your property.