Damp Proof Course

Chemical DPC

Control the vertical passage of moisture from the ground

Chemical damp-proof courses are inserted to control the vertical passage of moisture from the ground and are almost all installed in properties where no damp-proof course exists or it has broken down with age.

Benefits of DPC

Chemical damp proofing creates a barrier within your walls that stops groundwater from rising through porous bricks and mortar. It’s one of the most reliable solutions for tackling rising damp in both old and modern buildings.

Once applied, chemical DPC (Damp Proof Course) can protect your property for 20 years or more, especially when installed by professionals. It offers peace of mind and long-term structural protection.

Chemical injection is a fast and effective way to prevent rising damp. Most treatments can be done quickly and cleanly, with very little mess or disruption to your home or business.

Compared to major structural work, chemical damp proofing is a budget-friendly option. It prevents future repair costs by stopping damp in its tracks before it causes rot, mould, or damage to plaster and finishes.

By eliminating rising damp and preventing mould growth, chemical DPC helps create a healthier living environment – especially important for people with allergies or respiratory issues.

Chemical damp proofing is perfect for heritage homes and buildings that were built without a proper DPC. It allows you to preserve original walls and finishes while discreetly upgrading moisture protection.

RISING DAMP

Rising damp is dampness at the base of a wall caused by moisture rising from the ground by capillary action. Capillary moisture rise will occur in very old walls that were built without damp-proof courses, in walls where there is a damp-proof course which may have deteriorated over the years or in walls where an existing damp-proof course has been bridged, allowing ground water to bypass the damp-proof course. Over a period of time, moisture in the lower part of the wall will evaporate, depositing hygroscopic salts in the plaster which had previously been dissolved in the ground water. Hygroscopic salts absorb moisture from the atmosphere, therefore salt-contaminated plaster will be permanently damp. Another common characteristic of rising damp is deterioration of the damp plaster at the base of the wall.

Rising damp can be treated by first removing the contaminated plaster and then injecting an appropriate chemical into the masonry at the base of the walls which will prevent further capillary moisture rise. This chemical will form an effective damp-proof course if carried out correctly and we ensure that the chemical injection damp-proof course is installed strictly in accordance with British Standard specification BS 6576 2005. Following installation of the damp-proof course, the walls must be replastered to our specification.

The chemicals we use:

DPC fluid is a Potassium Methyl Siliconate fluid in a super concentrated form, which when diluted with water is used to create a chemical damp proof course. DPC Injection Cream is a highly effective cream emulsion on a Silane/Siloxane base with a formulation that allows deep penetration of the active ingredient within the building material which creates a damp proof course in walls above ground level.