Free surveys · Guaranteed work · UK-wide
Damp Proofing, Diagnosed and Fixed Properly
Rising damp, penetrating damp, condensation and mould — we survey the problem, tell you honestly what's causing it, and treat it at the source with a written guarantee.
- ✓ Free damp surveys
- ✓ Fixed written quotes
- ✓ Guaranteed workmanship
- ✓ Homes & commercial
What kind of damp have you got?
The three are treated completely differently — getting the diagnosis right is the whole point of a survey.
Rising Damp
Tide marks, salt staining and blown plaster on ground-floor walls — treated with a new damp-proof course and salt-resistant re-plaster.
Learn more →Penetrating Damp
Damp patches at any height caused by water getting in from outside — traced to the source and stopped, then the wall put right.
Learn more →Condensation & Mould
Black mould in corners and around windows — treated and fixed with the right ventilation so it doesn’t keep coming back.
Learn more →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.
What we do
Our damp proofing services
Rising Damp Treatment
Tide marks, salt staining and blown plaster on ground-floor walls treated at the source
Learn more →Damp-Proof Course (DPC) Injection
Installing a new chemical damp-proof course where the original has failed
Learn more →Penetrating Damp Treatment
Damp patches at any height caused by water getting in from outside
Learn more →Condensation & Mould Control
Black mould in corners and around windows fixed with the right ventilation
Learn more →Basement & Cellar Tanking
Structural waterproofing to turn a damp cellar into dry, usable space
Learn more →Damp-Proof Re-Plastering
Salt-resistant re-plastering after treatment, so walls redecorate cleanly
Learn more →Woodworm & Timber Treatment
Wet rot, dry rot and woodworm in timbers treated at the source
Learn more →Damp Surveys & Reports
Getting the diagnosis right before any treatment — free on standard jobs
Learn more →
Why homeowners choose us for damp
We diagnose before we quote
Every job starts with a proper survey. We won't sell you a damp-proof course for what's actually a condensation problem — the diagnosis comes first, always.
Fixed prices in writing
A clear, itemised written quote after the survey — no vague estimates that climb once the work starts, and no charge for the survey on standard jobs.
Guaranteed workmanship
Treatments are carried out to industry standards and backed by a written guarantee, because we fix the cause rather than cover the symptom.
Signs you might have a damp problem
Spotting one or more of these? It's worth a survey — the sooner damp is diagnosed, the cheaper and simpler it usually is to put right.
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.
DIY vs Painting Over vs Professional Treatment
How the three common ways of dealing with a damp wall actually compare.
Swipe sideways to see all columns →
| Factor | DIY fix | Painting over it | Professional treatment |
|---|---|---|---|
| Getting the cause right | Easy to misdiagnose — treating condensation as rising damp is common | Ignores the cause entirely — the damp is still there behind the paint | Survey first, so the actual cause is identified before any work |
| How long it lasts | Often returns if the real source isn’t dealt with | Weeks or months — damp and mould bleed back through | Treated at source and backed by a written workmanship guarantee |
| Damage to the property | Risk of making it worse or masking a spreading problem | Damp keeps working on plaster, timber and decoration underneath | Problem stopped before it reaches timber and structure |
| Cost over time | Cheap up front, expensive if the problem spreads | Cheapest short term, most expensive long term | Priced once, fixed properly, guaranteed |
| Suitability for a sale | No report or guarantee to satisfy a buyer or lender | A surveyor will still flag the underlying damp | Independent report and guarantee that help keep a sale moving |
Damp specialists you can actually trust
Damp is one of the most over-sold and mis-diagnosed problems in UK housing — plenty of homeowners are sold an expensive damp-proof course for what is really a condensation or a leaking-gutter problem. We do it the other way round: survey first, diagnose honestly, and only recommend the treatment the property actually needs.
From a single tide-marked wall to full basement waterproofing, every job is priced in writing, carried out to industry standards, and backed by a written workmanship guarantee. We work with homeowners, landlords, letting agents and commercial clients right across the UK.
More about how we work →Where we work
Damp Proofing UK provides damp surveys and treatment across the UK. Get in touch with your postcode and we'll confirm coverage and the next available survey date.
- Coverage
Nationwide — England, Wales & Scotland - WhatsApp
+44 7415 016237 - Email
contact@damp-proofing.org.uk
What our customers say
Real feedback from real damp jobs. We publish every genuine review we receive.
No reviews published yet — if we've treated damp for you, we'd love to hear how it went.
Be the first to leave a reviewAreas we cover
See all areas →Greater London
12 areas covered
Greater Manchester
10 areas covered
Kent
8 areas covered
Devon
7 areas covered
Staffordshire
7 areas covered
West Midlands
7 areas covered
Hampshire
6 areas covered
Merseyside
6 areas covered
Norfolk
6 areas covered
Nottinghamshire
6 areas covered
Essex
5 areas covered
Hertfordshire
5 areas covered
Book your free damp survey
Send your postcode and a short description — we'll arrange a survey and come back with a fixed written quote.
- ✓ Free survey and honest diagnosis
- ✓ Fixed written quote — no pressure
- ✓ Guaranteed workmanship
Frequently Asked Questions
How much does damp proofing cost in your area?
Most single-wall damp-proof course treatments in your area start from around £350, with a full room including salt-resistant re-plastering nearer £600–£1,200 depending on size and access. We always confirm a fixed price in writing after a survey — no hidden extras.
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 the damp survey really free?
For most straightforward domestic jobs, yes — a survey and fixed quote are free with no obligation. A detailed independent report (for a house purchase, mortgage or dispute) is a paid, separate service, which we confirm up front.
What is a damp-proof course (DPC)?
A DPC is a barrier that stops ground moisture rising up through a wall. Older properties may have a failed or missing one; we install a new chemical DPC by injecting a water-repellent cream into the mortar course, which cures to form a continuous barrier.
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 quickly can you survey a property in your area?
We cover your area regularly and can usually arrange a survey within a few working days — sooner for urgent cases such as a sale falling through on a damp report.
Book your free damp survey
Send your postcode and a short description — we'll arrange a survey and come back with a fixed written quote.