Damp Proofing in Newport
Across Wales, older stone-built and terraced housing exposed to heavy rainfall often suffers penetrating and rising damp, and we use breathable treatments suited to solid-wall construction.
Damp flagged on a mortgage valuation or buyer's survey in Newport is one of the most common reasons people call us — we can provide an independent written report and a fixed quote, which is often what's needed to keep a sale moving.
Across Newport we handle everything from rising damp treatment and penetrating damp treatment to condensation and mould control, installing a fresh damp-proof course and salt-resistant damp-proof re-plastering afterwards. Where damp has reached skirtings or joists we add woodworm and timber treatment, and for wet cellars we offer basement waterproofing — every job starting with a proper damp survey so the cause is diagnosed before any work begins.
Towns & areas we cover in Newport
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.
Damp services we offer across Newport
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
Condensation & Mould Control
Black mould in corners and around windows fixed with the right ventilation
Basement & Cellar Tanking
Structural waterproofing to turn a damp cellar into dry, usable space
Damp-Proof Re-Plastering
Salt-resistant re-plastering after treatment, so walls redecorate cleanly
Damp proofing in Newport — frequently asked questions
Can condensation and mould be fixed permanently?
Yes, but it’s about managing moisture and ventilation rather than a one-off treatment. We identify why moisture is building up, treat and remove the mould, and recommend the right ventilation (extraction, PIV units or improved airflow) so it doesn’t simply return.
Do you tank basements and cellars?
Yes — we waterproof basements and cellars using tanking slurry or a cavity drain membrane system depending on the structure and how the space will be used. This is quoted individually after a survey as it varies a lot property to property.
Is there a charge just for a quote?
No. A survey and fixed written quote for standard domestic damp work are free with no obligation to book. Only a formal independent survey report is a separate, paid service, which we agree with you beforehand.
What other areas near Newport do you cover?
We cover Newport as part of a wider service area — see the nearby towns listed on this page, or get in touch with your postcode and we’ll confirm coverage.
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 damp survey in Newport
Tell us about the damp and your postcode — we'll arrange a survey and a fixed written quote.