Damp-Proof Re-Plastering
After a damp-proof course goes in, the old plaster usually has to come off — it's contaminated with ground salts that keep drawing moisture from the air even once the wall is protected. Damp-proof re-plastering replaces it with a salt-resistant system so the wall dries out properly and can be redecorated without the damp bleeding back through.
Quick answer
Damp-Proof Re-Plastering typically starts from £600 — from £600 per room, depending on wall area and the extent of treatment. We confirm a fixed written price after a survey, before any work starts.
What re-plastering involves
Salts left in old plaster are hygroscopic — they pull moisture out of the air indefinitely, which is why simply skimming over a treated wall fails. We hack off the affected plaster back to the brick, apply a salt-retardant render coat and finish with a smooth plaster ready for decoration, following the specification that keeps the guarantee valid.
Re-plastering is the finishing half of most rising damp treatment and damp-proof course injection jobs — the DPC stops moisture rising, the new plaster deals with the salt-contaminated wall above it. It's also needed after penetrating damp where internal plaster has broken down. Skipping it, or using ordinary plaster, is the most common reason a "treated" wall shows damp again months later.
What's included in every re-plastering job
- ✓Salt-contaminated plaster removed back to brick
- ✓Salt-retardant render and finish plaster applied
- ✓Specified to keep the damp treatment guarantee valid
- ✓Left ready for decoration once dried
Get a survey for re-plastering
Book a Free SurveyWhatsApp +44 7415 016237Check if we cover your area →When you might need re-plastering
The most common situations we're called out for — if yours isn't listed, send a couple of photos through the contact form and we'll tell you exactly how we'd handle it.
After a damp-proof course
The salt-contaminated plaster above the old damp line needs replacing with a salt-resistant system.
Blown or bubbling plaster
Plaster that’s come away from the wall or is powdery and won’t hold decoration.
Preparing to redecorate
You want a treated wall finished properly so it can be painted or papered cleanly.
How It Works
- 1
Book a free damp survey
Tell us what you’re seeing — a tide mark, black mould, blown plaster or a survey that flagged damp. We arrange a visit, usually within a few days.
- 2
We diagnose the real cause
On site we identify whether it’s rising, penetrating or condensation damp (they’re treated completely differently) and give you a clear, honest explanation.
- 3
You get a fixed written quote
A clear, itemised price for the recommended work — no pressure, no vague estimates that move on the day, and no charge for the survey on standard jobs.
- 4
We treat it and guarantee it
The work is carried out to industry standards, the area is left clean and ready to redecorate, and the treatment is backed by a written workmanship guarantee.
Damp Proofing Price Guide
Indicative pricing — every job gets a fixed, written quote after a survey. No hidden extras.
Damp survey & report
diagnosis
Free
Free for straightforward jobs; a detailed independent survey report is available for mortgage or purchase cases.
DPC injection (per wall)
rising damp
from £350
Chemical damp-proof course injection to a single affected wall — priced by length and access.
Damp-proof re-plaster
per room
from £600
Salt-resistant re-plastering after treatment, so the wall can be redecorated cleanly.
Basement / cellar tanking
waterproofing
from £1500
Structural waterproofing (tanking or cavity membrane) — quoted per project after survey.
Often needed alongside re-plastering
Damp problems rarely come alone — these related treatments are commonly part of the same job, for example rising damp treatment, damp-proof course (dpc) injection and penetrating damp treatment.
Rising Damp Treatment
Tide marks, salt staining and blown plaster on ground-floor walls treated at the source
Damp-Proof Course (DPC) Injection
Installing a new chemical damp-proof course where the original has failed
Penetrating Damp Treatment
Damp patches at any height caused by water getting in from outside
Where we cover re-plastering
We provide damp-proof re-plastering right across England, Wales and Scotland as part of our regular damp proofing coverage, including busy counties such as Greater London, Greater Manchester, Kent, Devon, Staffordshire, West Midlands, Hampshire and Merseyside. Not sure if we reach you? Check the full areas we cover or just send your postcode with your enquiry.
Re-Plastering — frequently asked questions
Do I need to re-plaster after damp treatment?
Usually, yes. Rising damp carries salts into the plaster that keep drawing moisture even after the DPC is in, so the affected plaster is removed and replaced with a salt-resistant system. This is what lets the wall dry out and be redecorated without the problem coming back through.
How do I know if I have rising damp or condensation?
They're often confused. Rising damp shows as a tide mark up to about a metre on ground-floor walls, sometimes with salt staining; condensation shows as black mould in corners, around windows and in poorly ventilated rooms. A survey confirms which it is — the treatment is completely different, so getting the diagnosis right first matters.
Is your damp proofing work guaranteed?
Yes — damp-proof course treatments are carried out to industry standards and backed by a written workmanship guarantee. We confirm the exact terms and length in your quote before any work starts.
How long does damp proofing last?
A correctly installed damp-proof course and salt-resistant re-plaster should last for decades, which is why the work is backed by a written guarantee. The key is treating the actual cause, not just covering the symptom — which is what the survey stage is for.
Damp is treated by cause, not by symptom: rising, penetrating and condensation damp look similar but need completely different treatments, which is why every job starts with a proper survey and diagnosis before any work is quoted.
Book a free survey for re-plastering
Tell us about the damp and your postcode — we'll arrange a survey and a fixed written quote.