Damp surveys, damp proofing and mould removal by certified specialists — across London and Surrey. We diagnose the cause first, fix it at source, then replaster and make good.
Not all damp is rising damp. Getting the diagnosis right is what decides whether a repair lasts or reappears in two winters.
Moisture drawn up through masonry where there is no damp proof course, or where the original slate or bitumen course has failed or been bridged. Recognisable by a tide mark up to around a metre, salt blooming and perished plaster at skirting level.
Our remedy: Bridging removed, ground and render levels corrected, a chemical DPC injected where the course has genuinely failed, then salt-retardant replastering.
Water crossing the wall from outside — failed pointing, cracked render, blown bricks, defective flashing, blocked gutters or leaking downpipes. Typically patchy, worse after rain, and often on one elevation only.
Our remedy: The external defect is repaired first: repointing, render patching, flashing and rainwater goods. Internal finishes are only made good once the wall is drying.
By far the most common damp we are called to in London flats. Warm moist air meeting cold surfaces — corners, window reveals, behind furniture on external walls — producing black mould rather than a tide mark.
Our remedy: Ventilation upgraded, extraction improved, cold bridging addressed, then mould treated at source rather than painted over.
Basements, cellars and lower-ground rooms taking water through the structure under hydrostatic pressure. Common in Victorian South London housing where cellars have been converted into habitable space.
Our remedy: Cementitious tanking or a cavity drain membrane system with sump and pump where needed, detailed so the finishes are not sitting against a wet wall.
Damp that looks structural but is a leaking waste, heating pipe, shower tray or roof detail. Often misdiagnosed and treated as rising damp at considerable expense.
Our remedy: We trace and fix the leak, allow the fabric to dry, and only then reinstate plaster, decoration and flooring.
Where damp has been present for years, hygroscopic salts sit in the plaster and keep drawing moisture from the air long after the source is gone. Decoration keeps failing for no obvious reason.
Our remedy: Contaminated plaster hacked off to a set height and replaced with a salt-retardant render and skim system.
Survey, diagnosis, price, then work — in that order.
We inspect inside and out, take moisture readings, check ground and render levels, gutters, flashings and ventilation, and identify the actual cause rather than assuming the worst case.
You get a plain-English report explaining what we found, what is causing it and what genuinely needs doing — including where no damp proofing is required at all.
Priced by stage: external repairs, DPC or tanking works, plaster removal and replacement, ventilation and decoration.
External and structural defects are corrected first. Treating symptoms before the source is why damp comes back.
DPC injection, tanking or membrane systems installed, then salt-retardant replastering carried out by the same team.
Adequate drying time before decoration, ventilation checked, and the room reinstated properly rather than closed up wet.
Damp work is often the first stage of a bigger project — see how a full house renovation runs or check the areas we cover.
Our work is reviewed publicly by customers on Checkatrade, so you can read independent feedback before inviting us round.
It depends entirely on the cause. A localised penetrating damp repair with replastering is a modest job; a full chemical DPC with replastering to several walls, or a tanked cellar, is a significantly bigger one. We survey first and price against a written scope, so you know what is included before committing.
Often not. A large share of the damp we are called to in London homes turns out to be condensation, a leaking pipe, raised external ground levels or failed pointing. We diagnose before recommending treatment — and we will tell you when a damp proof course is not the answer.
Yes. We survey the property, take readings and give you a written explanation of the cause and the remedy. If you have a mortgage valuation or building survey flagging damp, send it over with your enquiry.
Masonry dries roughly at a rate of 25mm per month in good conditions, so new plaster should be left before heavy decoration. We tell you what to expect rather than pushing to finish and hand over a wall that is still wet.
Yes. Damp work is usually part of a wider refurbishment for us, so plastering, joinery, flooring and decoration are all handled by the same team on the same programme.
London and Surrey. We work regularly across Wandsworth, Clapham, Balham, Streatham, Croydon, Sutton and Wimbledon. Send your postcode and we will confirm.
Photos of the affected wall inside and out, plus any survey report you have, let us give you a far more useful answer. We reply within one working day.