Damp proofing · York, North Yorkshire
Damp proofing in York: 25m² of Damp Walls Stripped, Damp Proofed and Replastered in 4 Days
In July 2026, EcoTrust Roofing & Insulation Ltd carried out damp proofing at a home near York, North Yorkshire, where rising damp and some penetrating damp had spoiled the plaster in the living room and a stairwell cupboard. The team stripped about 25m² of wall to 1.5m, injected a damp proof course, fitted a damp proof membrane and replastered and skimmed, as part of a 4-day job. The damp proofing carries a 25-year insurance-backed guarantee.
The problem
The homeowner booked a full survey because of damp in several rooms. Our surveyor found rising damp, with some penetrating damp, coming through the living room wall opposite the chimney, the right side of the chimney breast and inside the stairwell cupboard.
The original damp course outside was set too low, the pointing along the side alley had worn, and the right-hand chimney had failing mortar and flashing that let water in. In the loft, timbers were reading 19 to 21% moisture and insulation packed between the rafters was blocking ventilation.
What we did
- Full survey: moisture readings inside and in the loft, and a written plan covering the damp, the outside and the roof space.
- Stripped the plaster to a height of 1.5m on about 25m² of wall across the living room, the chimney side and the stairwell cupboard.
- Injected a new damp proof course into the brickwork and applied damp proofing slurry.
- Fitted a damp proof membrane over the treated walls, then replastered and skimmed them.
- Fitted air bricks beside the chimney and in the stairwell cupboard, and renewed the ceiling around the boiler flue.
- Outside and in the loft: repointed the alley wall, repointed and reflashed the chimney, patched the felt, treated the timbers, removed the rafter insulation and relaid the loft floor insulation under raised boards.
The result
About 25m² of damp wall has been stripped, damp proofed and replastered to a smooth skim finish, ready for decorating. The work was done in 4 days.
With the outside pointing, chimney and loft ventilation sorted too, the sources of water have been dealt with as well as the walls. The damp proofing is covered by a 25-year insurance-backed guarantee.
Damp proofing in York: questions we get asked
How do I know if I have rising damp?
Common signs are a tide mark up to about a metre high, blown or salty plaster, peeling paint and a musty smell low on ground floor walls. A proper survey with moisture readings confirms it. In this York home the damp was mainly rising damp, with some penetrating damp from outside.
Why strip the plaster when treating damp?
Old plaster soaks up salts from the damp, and those salts keep pulling in moisture even after a new damp proof course goes in. On this York job we stripped the walls to 1.5m, treated the brickwork, fitted a damp proof membrane and replastered, so the new finish stays dry.
How long does damp proofing take?
One or two walls can often be done in a couple of days. This York job took 4 days because it covered about 25m² of wall across three areas, plus pointing, chimney repairs and loft work. You get a clear timescale in writing with your quote before anything is booked.
Is damp proofing guaranteed?
Yes. Our damp proofing comes with a 25-year insurance-backed guarantee, so the cover stays in place even if something happened to the company. We also look for the cause of the damp, such as pointing or chimney flashing, because treating walls alone will not last if water is still getting in.
Do you cover the rest of York and North Yorkshire?
Yes. We carry out damp proofing across York, including Haxby, Acomb, Strensall and Easingwold, and across North Yorkshire and most of England from our Manchester and Sevenoaks offices. Book a free survey online or call 0800 870 8086 and we will confirm a date for you.
Need damp proofing in York or nearby?
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