Investigation and treatment of rising damp, penetrating damp, and condensation. Covers chemical DPC injection, external waterproofing, and replastering with salt-resistant render.
Typical cost
£1,500 — £3,000
Typical duration
3-5 days
Scope type
flexible
Typical tasks
Damp survey and moisture meter readings
Rake out failed plaster and mortar
Inject chemical DPC at correct centres
Apply salt-resistant backing coat
Re-skim and prepare for decoration
Extras & additional works
Based on a standard 20m² area, costs may increase if additional structural repairs are needed or if access is difficult.
Common questions Stainesai
The cost can be affected by the size of the area, the extent of damp damage, and any additional structural repairs needed.
Damp proofing is covered by Building Regulations under Part C, which addresses resistance to contaminants and moisture. Related structural repairs may also need to comply with Building Regulations. Always confirm with your general builder before work begins.
A standard damp proofing job for a 20m² area typically takes 3-5 days, including drying time for materials.
The process includes a damp survey, raking out failed plaster, injecting a chemical DPC, applying a salt-resistant coat, and re-skimming.
It's not usually necessary to vacate, but you may need to avoid the treated area until the work is complete and materials have dried. Always confirm with your tradesperson before work begins.
Ready to post a damp proofing job?
Describe what you need. Stainesai structures it into a proper scope. Your first job post is free.