Damp Proofing in Trowbridge
Looking for damp proofing in Trowbridge? We start with a proper survey to work out whether it's rising, penetrating or condensation damp — because they're treated completely differently — then fix it at the source. Trowbridge is part of our regular Wiltshire coverage.
Quick answer
Damp proofing in Trowbridge 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 Trowbridge?
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.
Damp-proofing work in Trowbridge is backed by a written workmanship guarantee, because it's done by treating the actual cause — a failed damp course, an outside water-entry point, or a ventilation problem — rather than just covering the symptom.
Every job in Trowbridge 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 Trowbridge
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 Trowbridge 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 Trowbridge
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
Trowbridge is one of many towns we cover across Wiltshire — we're regularly working in these nearby areas too:
Related damp services in Trowbridge
Damp Surveys & Reports
Getting the diagnosis right before any treatment — free on standard jobs
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
Damp proofing in Trowbridge — frequently asked questions
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.
Do you cover both homes and commercial properties?
Yes — we treat damp in houses, flats and commercial premises, from a single damp wall in a home to larger surveys and waterproofing for landlords, letting agents and commercial buildings.
How and when do I pay?
Larger jobs are typically arranged with a deposit to book the work and the balance on completion. Full payment terms are set out in your written quote before anything starts — nothing to pay just for a survey and quote.
Do I have to move out during the work?
Rarely. Most damp proofing is done room by room while you stay in the property. For larger basement waterproofing projects we’ll talk through access and timing at survey stage.
How do I book a survey?
Send your postcode and a short description (photos of the affected area help) by phone, email or the contact form, and we’ll arrange a survey and come back with a fixed written quote.
How much does damp proofing cost in Trowbridge?
Most single-wall damp-proof course treatments in Trowbridge 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.
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 Trowbridge
Tell us about the damp and your postcode — we'll arrange a survey and a fixed written quote.