We all know it rains a lot in the UK so making sure your property is not susceptible to water ingress is extremely important.
A damp proof course is a long-term treatment that prevents damp rising up the walls above ground damaging the property as a result. Properties that do not have an appropriate damp proofing are more likely to take on excess moisture. This can cause various problems such as rising damp, wet rot and dry rot.
There are many reasons a damp proof course can fail. A common reason is building renovations that raise the ground level above the current damp proof course. In circumstances such as this, we would always recommend a professional inspection of the faulty damp proof course to evaluate any necessary repairs.
Peter Cox offer a few different methods to achieve a damp proof course. The most appropriate method will usually depend on the type of property:
Damp Proof Injection - Otherwise known as a chemical damp proof course, this process involves the injection of a silicone-based liquid or cream into the wall to produce a water-repelling layer. The damp proof injection is applied at no less than 150mm from the base of the wall and is often a more practical solution than other “solid” damp proof courses.
Electro+ Osmotic damp proof course - Another option particularly when dealing wit thicker stone rubble filled walls would be install Elektro+ Osmotic solution. With this solution, any water rising up through your wall is driven back down to the ground with a positive electric charge. They are widely used in historic and older buildings.
Damp Proof Cream - This damp proof course uses our Drywall+ Silane Diffusion technology. The damp proof cream diffuses in the presence of moisture and releases a silane vapour that reacts with the silica in the masonry forming a water repellent resin. This is a versatile solution for rising damp and can be used in walls of any type and thickness.
Damp Proof Membrane - Damp proof membranes can be used to form part of a damp proof course. The damp proof membrane is positioned underneath a concrete slab with the intention of protecting the concrete from any moisture and therefore making it damp proof.
A damp proof course is a typical feature of most contemporary properties, however the widespread use of “DPCs” only came about in the 1920s. As a great number of houses in the UK are older than this, it is possible that your property does not have a damp proof course. If your property was built after 1920 it is also possible that your current damp proof course has weakened and failed over time.
Any signs of damp on the lower half of walls normally points toward an issue with the damp proof course. If this is the case we would recommend getting a professional damp specialist to investigate.