See our page on replastering as part of a rising damp treatment for details of replastering systems available. The graph across shows the performance of high-strength DPC cream in a typical lime mortar compared with a low-strength DPC cream.

Holes should be drilled to a depth slightly less than the thickness of the wall - see full instructions for suggested drilling depths for common wall thicknesses. Dryrod Damp-Proofing Rods: These patented 12 mm diameter fibre rods carry a powerful water-repellent material. The rods are an even more effective alternative to the industry leading Dryzone Damp-Proofing Cream and are suitable for situations that require maximum performance, guaranteed dosing or increased treatment speed.Standard plastering materials, such as gypsum plaster, are not suitable for replastering a salt-contaminated wall.

Dryzone is introduced along the mortar course of the damp wall at regular intervals by injecting it into pre-drilled holes, it is quick to install, low hazard and has BBA approval. Once a wall has been treated, it will begin to dry out but if the wall has been contaminated by groundwater salts then complications can arise, often leading to the appearance of damp patches, on an otherwise dry wall.It is a biocidal sanitising solution that is designed to kill mould spores and prevent the regrowth of mould on cleaned surfaces. The results have shown Dryzone, which contains 60%+ active, to be effective against rising damp whilst the low-strength imitations had minimal effect.