Damp Proofing · Doncaster
In May 2026 our team carried out damp proofing at a home in Doncaster, South Yorkshire. Inside, damp walls were stripped back, a damp proof course was put in around a bay window and chimney breast, and the walls were replastered. Outside, we repointed parts of the rear wall and carried out lead flashing work on the rear chimney. The work took 4 days.
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Evidence-led work
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The damp was coming from more than one place. In the back right bedroom, the chimney had a penetrating damp problem and the plaster around the bay window had failed. Water was getting in around the door, and the wall by a bay window and one side of the chimney breast needed a damp proof course.
Outside, the pointing on the rear of the house had gone in a few areas, letting water in, and the lead flashing on the rear chimney needed work.
The damp walls were stripped, treated and replastered, and the outside of the house was put right to stop water getting in. The after photos show the new plaster still drying out. It needs to dry fully before it is painted.
Look at the outside before you look at the inside. If the pointing is cracked or missing, or the lead around the chimney has lifted, water can get into the wall and show up as damp indoors. Fixing the inside alone won't last if the outside is still letting water in.
On this Doncaster job, part of the damp was penetrating damp from the chimney and through worn pointing. So the rear pointing and the chimney lead flashing were dealt with as well as the internal walls.
Around the bay window and one side of the chimney breast, the plaster was stripped to 1m before the damp proof course went in.
The internal damp proofing in several rooms, plus the pointing and lead work outside, took our team 4 days.
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Freephone 0800 870 8086
What we do
No subcontractors sent out in our name. The surveyor who quotes it sets out the work, and the lads who turn up are ours.
The most common reason people call us: a mortgage lender or surveyor has flagged spray foam in the loft and the sale has stalled.
Old, flattened insulation taken out, the loft space cleaned, and new wool laid to depth. Boarded storage raised above it if you want the space back.
Rising and penetrating damp traced back to what is actually causing it — then fixed outside as well as in, so it does not come back.
Raised on legs so the deck sits above the insulation instead of crushing it. Storage you can use without a colder bedroom underneath.
We are in lofts every day, so we see the roof from underneath before anyone goes up top — which is usually where the real fault shows.
Not sure what you need?
Most people ring us describing a symptom, not a service. Pick the one that sounds like your house.
We survey free, price it in writing, and hand over the certification your surveyor or lender is asking for.
