There are three main causes that are clearly related with damp and namely they are rising damp, penetrating damp and condensation.
Rising Damp – the water in the ground usually rises through the building wall which is similar to a sponge soaking up the water around it. This can occur due to various factors such as the complete absence of a damp proofing course which is mainly the fact in older buildings or the failure in properly installing a quality damp proofing course.