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Damp Proofing

Damp under stairs cupboard

Anonymous user 1 March 2024 - 3.00 PM

Wanting to put in some under stairs storage but there is quite a strong smell of damp in there. Having cleared the cupboard I can see the floorboards look damp but having lifted one of the boards there are no pipes under the damp board. There is a patch of the external wall which looks to have been repaired in the past (I don’t think it’s plaster) but this is damp to touch and we have noticed droplets of water on only this part of the wall which I think is then running down the wall onto the floor. A pipe detector doesn’t seem to show any pipe work in the wall. Not sure if it’s just condensation and we need more airflow in the cupboard or something bigger and not too sure even on the right type of tradesperson I’d need to get in touch to take a look at the issue but want to get it sorted before spending money on installing storage. Any advice welcome.

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2 Answers

Damp Investigations
Rating: 5 out of 555232 reviews
Southall
If it’s ‘sweating’ it’s because the wall has thick plaster on ; plaster is hygroscopic. It is also certain that the sub floor void is venting into the cupboard. You need to check that all your sub floor air vents are clean and open around the property. Then seal the under stair floor from venting into the cupboard.
Answered26 February 2023
9

Anonymous user

It could be 2 reasons you dpc has broken down which will course rising damp and if your floor boards are sweating underneath because of no ventilation could course more problems in the future so what would need to happen is the plaster would need to be taken of back to brick and a membrane has to be installed to the brick with insulation pegs and re-plastered
Answered9 March 2023
0