04/09/2026
This house is Grade II listed — which changes how you’re even allowed to fix the damp.
The call was a musty smell and a fear the whole place was wet, the old coal room blamed for it. On a listed Georgian building that’s the moment to slow right down — because here, how you repair matters as much as what you repair.
A damp meter reads surface moisture, not proof of damp, and a musty smell isn’t the same as a wet wall. Four areas were flagged and three weren’t a damp problem at all: the wardrobe smell was trapped air, the “damp” under the stairs was a suspected waste-pipe leak for a plumber. The one genuine issue was the below-ground coal vault — no waterproofing, moisture tracking in through the structure.
And it doesn’t stop at the vault. Outside, the real culprits were the kind most people walk straight past: a blocked light well holding water against the wall, blown stucco render lifting away from the brick, and perished mortar joints letting wind-driven rain soak into the masonry. On an old building the outside is usually where the damp starts — fix the wall from the inside only and you’re treating the symptom while the cause keeps feeding it.
And this is where listed status bites. You can’t just tank it in hard cement and modern coatings — on a building like this that traps moisture and pushes it into the surrounding masonry, doing more harm than the damp did. The vault needs a proper waterproof system installed with care for the original fabric, and those outside repairs done in breathable lime, not cement. On a listed building, some of this may even need consent before a tool touches it.
Half of surveying a listed building is knowing what the law and the fabric will let you do — not just what would stop the damp.
Grade II listed. Georgian townhouse, early 1800s.
