Damp Proofing in Devizes
Damp in Devizes — whether it's rising up from the ground, getting in from outside, or condensation building up inside — is diagnosed by survey and treated at the source, with the price agreed before we start. We're out across Wiltshire regularly, so most enquiries get a survey within days.
Quick answer
Damp proofing in Devizes starts with a free survey to diagnose whether it's rising, penetrating or condensation damp, followed by a fixed written quote. Most single-wall treatments start from around £350, with the work carried out at the source and backed by a written guarantee.
How does damp proofing work in Devizes?
In the South West, exposure to wet, wind-driven weather means penetrating damp through render and pointing is common, along with damp in older stone and cob properties that need breathable, appropriate treatment.
Every quote for damp work in Devizes is confirmed as a fixed written price after the survey — an itemised figure for the recommended treatment, not an estimate that moves once the work starts.
Every job in Devizes starts with a survey and a fixed written price before any work begins — get in touch through the contact form with your postcode and a short description. You can see indicative costs on our price guide or read the full how it works steps.
Damp services available in Devizes
Whether it's rising damp treatment on a ground-floor wall, penetrating damp treatment where water is getting in from outside, or condensation and mould control in a poorly ventilated room, every job in Devizes starts with a proper damp survey to confirm the cause. From there we install a new damp-proof course where needed, follow up with damp-proof re-plastering, and deal with any woodworm and timber treatment or basement waterproofing the property needs.
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.
Common damp problems we treat in Devizes
Rising damp
Tide marks and salt staining up to about a metre on ground-floor walls.
Penetrating damp
Damp patches at any height that appear or worsen after heavy rain.
Condensation & mould
Black mould in corners and around windows, and streaming glass in winter.
Damp-affected timber
Wet rot, dry rot or woodworm where moisture has reached joists and skirtings.
Also serving nearby in Wiltshire
Devizes is one of many towns we cover across Wiltshire — we're regularly working in these nearby areas too:
Related damp services in Devizes
See all damp proofing services →Damp proofing in Devizes — frequently asked questions
How much does damp proofing cost in Devizes?
Most single-wall damp-proof course treatments in Devizes 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 Devizes?
We cover Devizes 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.
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 damp survey in Devizes
Tell us about the damp and your postcode — we'll arrange a survey and a fixed written quote.