Treatments
DPC injection
Chemical damp-proof course injection following suitable diagnosis, with plaster and drying guidance.
Why diagnosis matters
Treat the cause, then repair the damage
A chemical DPC can help control rising moisture where the construction and diagnosis support it. It should not be installed simply because a meter reads high or a wall is damp at low level.
Technical review
Dan, Director / Surveyor
Last reviewed: July 2026. Advice is general until the property, access and visible evidence have been assessed.
Guarantee & aftercare
Written guarantee terms are matched to qualifying work, with inclusions, exclusions and aftercare explained before acceptance.
What we consider
Possible causes and lookalikes
Failed or absent original DPC
Bridging that also needs correction
Residual salt contamination
Inappropriate diagnosis to be ruled out
Inspection method
A clear work sequence
Step 1
Confirm rising moisture diagnosis
Step 2
Remove obstructions and define the system
Step 3
Install the DPC to specification
Step 4
Reinstate plaster and provide drying guidance
Scope boundaries
Honest about what the work does—and does not—cover
Injection does not repair gutters, leaks, high ground levels or condensation. The treatment and any guarantee apply only to the written scope and exclusions.
Common questions
About dpc injection
Can I inject a DPC myself?+
Products are available, but correct diagnosis, injection pattern, substrate assessment and plaster specification all affect the outcome.
How disruptive is the work?+
The injection itself is usually localised, but contaminated plaster removal can create dust and require room protection. We explain the sequence beforehand.
Is injection always required?+
No. Bridging, leaks and condensation may need different action.
Related services
Continue your investigation
Next step
Claim your complimentary survey before choosing a treatment
Tell us what you can see, when it changes and where the property is. Photographs can help us triage the next step.