Dryzone - Targeted Treatment Rising Salt Damp

Rising Salt Damp

Also known as "Rising Damp" and/or "Salt Damp".

The Symptoms...
Flaking paint, bubbling plaster, crumbling bricks, stonework and mortar and/or timber decay and a musty odour are among the most common symptoms of rising salt damp.

Rising Salt Damp...
Rising salt damp is caused by the same natural capillary action by which plants absorb moisture into their stems from the soil beneath.

So whenever there are moisture absorbent materials such as bricks, mortar or external renders in contact with the ground then the moisture will naturally rise through them unless there is a barrier in the form of a damp proof course. This dampness will continue to rise in the walls unless checked, bringing with it liquid salt particles which can cause major damage if not treated.

The Effects...
As the moisture in the wall evaporates upon exposure to changing temperature conditions, the liquid salt particles crystallise and expand leaving salt crystals on the surface. This micro explosion in the substrate starts to create damage to the structure of the wall. The problem is compounded when these salt crystals attract atmospheric moisture which perpetuates the damage cycle.

Often there is no visual evidence of the damage being done and an inspection by our consultant with a moisture meter is the only way to know whether there is a problem or not.

The visual signs, when evident, are discolouration or blistering of internal plaster and paint. Externally crumbling of mortar and brick/stone work at ground level is evidenced.

Any salt damp, like a cancer in humans, will do less damage to the structure of the building if treated in its infancy.

Failure to treat the problem properly can result in a house that is unpleasant to live in and difficult to sell, therefore it is important to choose an effective method of treatment.

The Cover-up...
It can be tempting to try and cover up any damp patches with a special paint or coating in the hope that the problem will go away. However, the dampness will often find a way round such coatings and reappear at a later date. Only by introducing a damp proof course can rising salt damp be properly controlled.

The Solution...
Click here to view the DRYZONE treatment.

Illustrations of Rising Damp




How do I know if I have Rising Damp?
Dryzone is specifically designed for the treatment of rising damp, so it is important to be certain that this is the cause of dampness before treatment begins. Other types of dampness that affect buildings (e.g. condensation, lateral damp, penetrating damp) are treated in different ways - call your national Dryzone distributor for details. Diagnosis of dampness in buildings should be carried out by a specialist surveyor, however, typical signs of rising damp include: • Signs of dampness limited to bottom 1m of ground-floor walls • Damp or decayed skirting boards • Salt deposits on the wall surface If you would like to arrange for a specialist surveyor to visit your property, please visit the contact-page to contact your national distributor. Further information about diagnosing rising damp can be found in our free publication “Rising Damp and its Control” which can be downloaded free of charge from our literature download page.