Anyone can inject a wall. The difficult part, and the part that decides whether the damp comes back, is working out what is actually putting water into it. We look for that first, and we will tell you if the answer is cheaper than you feared.
Know what you have
Treating the wrong one is the most expensive mistake in this trade. Here is how they tell themselves apart.
A tide mark low down the wall, often under a metre, sometimes with a white salt bloom and blown plaster.
A damp proof course that has failed, been bridged by raised ground or a flowerbed, or was never there at all.
A patch that darkens after heavy rain and dries back between spells. Usually higher up, and often in the same spot every time.
Water getting in from outside: a blocked or split gutter, cracked render, failed pointing, a slipped slate, or a bridged cavity.
Black spotted mould in corners, behind furniture, on cold external walls and around window reveals. Worse in winter.
Moist air with nowhere to go. Cold surfaces, too little ventilation, and often a house that was sealed up for insulation without anyone adding airflow back.
How we work
Injecting a wall that did not need injecting is expensive, disruptive and does nothing. We would rather spend an hour outside with a ladder than sell you a treatment you do not need.
We look outside before we look inside. Ground levels, gutters, pointing, render, airbricks. A great many damp problems are a twenty pound gutter bracket, not a treatment.
In plain terms, with what we found and what it will take. If the fix is smaller and cheaper than you were braced for, that is what you will hear.
Chemical DPC injection, a cavity drain membrane system, or a breathable coating where the wall needs to stay open. Which one depends entirely on what step one turned up.
Treated walls need a salt-resistant, correctly specified replaster. Skip that and residual salts pull moisture back through and stain straight through your new paint within a year.
Services
One firm doing the treatment and the replastering means there is nobody to blame if the finish fails. That is deliberate.
On older solid-walled property the answer is often not a membrane at all, but taking off whatever sealed the wall in the first place and letting it breathe again. See our heritage and lime work for how that is done.
Common questions
Send us a photo and roughly where it is on the wall, or ring and describe it. We will tell you what it sounds like and come and confirm it properly.
