Start on the Outside!

Our procedure on damp proofing surveys is we always start on the outside of the property looking for potential problems. The first step must be to check for an existing damp-proof course (dpc), when examining for the presence of a dpc the possibility that it has been bridged should be checked. This can include rendering over the dpc externally or bridging by plaster internally, raised soil levels or paths, driveways or even rubbish piled against the wall, all provide possible routes for moisture. In cavity walls mortar droppings within the base of the cavity will allow moisture to bridge the dpc and spoil the internal fabric.