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Damp Proofing

Mystery damp patches on carpet

Anonymous user 16/03/2024 - 2.37 PM

I have a damp patch on my ground floor carpet which started last year, a couple of feet away from any walls. Gradually the spread towards the (extrrnal) wall and the carpet is damp to touch along the full length of the wall, extending about 2 feet into the room. Under the carpet the boards are mainly dry, with 4 damp patches across the area, all about the size of my hand. They look damp as they are darker than the rest of the area, they feel a bit cold & damp to touch but not wet. We lifted the boards and it is completely dry underneath (walls & pipes). Outside the building is in good repair & there are no drains, pipes, cracks or obvious places where water is getting in. Any ideas what to try next? Although relatively mild damp, & not so bad it smells or has mould, it is persistent, it has damaged the legs of furniture & I really want it fixed so I can fully use the room. It is raised ground floor (on a hill) so a long way up from ground level...there is room to stand under the floorboards, so I dont think a damp proof issue.

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3 Answers

Nots Renovations

Rating: 4.9 out of 5
Sutton In Ashfield
Strange this as I've been to look at one similar today , you do need to check for rising damp , but I would also recommend lifting a couple of the boards that have damp patches on them and look underneath the board to see if the board is wet underneath , if the board is not damp underneath it could be a ventilation problem , if you have no ventilation in the room and the floor void is not insulated it could be a case of lack of ventilation resulting in condensation , warm air in the room will always migrate to cold surfaces and that produces water , it could be the case that the moisture in the air is settling on the cold carpet , I would recommend buying a humidity meter ( cheap off Amazon ) and place it in the room for 24 hours , a good reading would be if the room temp was around 21 degrees and the humidity between 30-60 any higher would normally not be good and some form of ventilation installed , like a couple of passive vents , these allow moisture in the air to escape but won't let the cold wind outside in , I would also recommend that the floor beneath is insulated , but before doing that make sure your cross ventilation under the floor is good Regards Daniel
Answered26 November 2020
3

pro tec roofing and building

Rating: 5 out of 5
Rhyl
sounds like Rising Damp ,but you do need some one to inspect the property for full assessment to see were the issue is occuring
Answered31 October 2020
0

Dovedale Dampcure Services Ltd

Rating: 4.9 out of 5
Hull
Wouldn’t be rising dampness at all. More than likely to be condensative damp due to a lack of adequate ventilation in the underfloor area.
Answered26 November 2020
0