The Causes and Cures of Rising Damp


Rising damp is a relatively rare type of damp that generally affects the walls of buildings. It is formed when moisture from the subfloor level of the building travels upwards by capillary action through the walls. This is comparable to ground water getting sucked upwards by a series of straws placed within the bricks. Along with that water, the salt present in it also travels upwards. If there are porous building materials such as timber, skirting, joists, or floor boards around the affected wall, these materials also tend to absorb ground water.

In most instances, rising damp is noticed first in the form of a building’s damaged internal walls. The paint and plaster of a rising damp affected wall gets deteriorated, and its wallpaper loosens and ultimately gets detached. You may also notice a visible stain in the form of a tide mark, indicating the highest point reached by the ground water. Blooming salts may also be seen on the internal surface of the wall. In the external surface of the walls, crumbling mortar and white salt stains are the most common results of rising damp.

Causes of Rising Damp:

Most of the buildings are equipped with some kind of a barrier at the wall’s lower level to prevent the upward movement of water. These barriers are known as DPC or damp proof course. Most of these barriers are made of plastic, bitumen, slate, or other water-resistant materials. Over a period of time, the damp proof courses may fail. In some of the older houses, a DPC may not exist at all. At times, a damp proof course may get bridged, even though it is intact. This happens mostly because of construction faults, and allows damp to travel upwards past the damp proof course.

Some other common causes of rising damp are


Elimination of Rising Damp:

Naturally, the cures of rising damp require addressing the factors that are responsible for its formation. Mentioned below are some of the best ways to deal with this problem.

DPC Related Problems:

Subfloor Ventilation Issues:

Sub-floor Obstructions:

Damaged Pipes and Gutters:

If you are facing rising damp or any other subfloor related issues, please contact us immediately for guaranteed solution. We specialise is designing and installation of sub-floor ventilation systems that provide effective and long-term moisture control for building foundations.