The presence of rising damp on internal walls is a serious problem that affects both the internal plaster and the structure of a building. The underlying cause is the moisture from groundwater. These water evaporations contain dissolved salts that are invisible to the naked eye. The resulting crust forms on the walls and absorbs the moisture from the air. The deposits are not harmful to the structure, but they can lead to the development of mould.
Re-plaster The Wall After Treating Rising Damp
In order to deal with rising damp internal wall, the first step is to remove the skirting boards. If the cause of the problem is a blocked cavity wall, it is best to cut it away. Moreover, if the water reaches the DPC, you must remove the plaster 300 mm above the detected level of the moisture. If you have the time, you can even install a new plaster to cover the damp-prone areas.
This is a major cause of damage to internal walls. Plaster and paint can deteriorate. Wallpaper tends to come loose as a result. Additionally, a visible stain appears at the place where the ground water reached. In addition to paint debonding, the occurrence of salts may lead to crumbling plaster. Externally, the plaster can crumble. In severe cases, white, powdery residue will develop on the walls.