Deal with the upward moisture route properly
The existing course checked
We look for missing, bridged or ineffective protection before choosing treatment.
Options for different walls
We can specify injection, course repair or a membrane to suit the masonry.
Salt-damaged plaster removed
Contaminated finishes are taken off where needed before suitable reinstatement.
Recognise the low-level pattern of rising damp
Rising damp occurs when ground moisture moves upwards through porous brick or stone. You may see a tide mark near floor level, white salt deposits, peeling decoration or plaster breaking down along the bottom of a wall. Those signs need checking because leaks and condensation can leave similar damage. We examine the height and pattern of moisture, then assess the existing damp-proof course. It may be missing, bridged by raised ground or plaster, or no longer effective. Only after that inspection do we specify rising damp treatment. This keeps the remedy tied to the wall's construction and the route the moisture is taking.
Courses and membranes selected for the wall
Treatment may involve repairing the damp-proof course, injecting a chemical course into suitable masonry or installing a damp-proof membrane. The correct choice depends on wall type, condition and access. Where salts and moisture have damaged the plaster, we remove the affected material before installing the specified system and applying suitable replacement finishes. The masonry then needs time to dry, so final decoration should not be rushed. We explain the expected drying period and the type of paint that can be used first. Most of our damp-proofing work carries a 10-year guarantee for reassurance after completion.
Frequently asked questions
What are the usual signs of rising damp?
Common signs include tide marks low on a wall, powdery salts, peeling paint and plaster that crumbles near floor level. We still inspect the area because plumbing leaks, external water and condensation can sometimes create similar symptoms.
Does every wall need a chemical damp-proof course?
No. We check the construction, moisture pattern and condition of any existing course first. Chemical injection suits some walls, while course repair, removal of bridging or a damp-proof membrane may be the more appropriate response.
Why does plaster sometimes need to be removed?
Old plaster can hold moisture and salts drawn from the masonry. Where contamination is significant, we remove it so the chosen damp treatment can be installed correctly and the wall can receive a suitable replacement finish.