Don't suppose youve been decorating that room have you?
Failing that get a ' damp meter ' and just check the whole room ( floors and ceilings too ). It does seem odd its only one room . youve ruled out your presence in the room, which is a start , now you need to completely rule out any damp. As its south facing ( and probably gets all the weather ) I wonder if rain is being blown in somehow
Was it the only room your decorated? What decorating did you do? Completing clutching at straws , it could be the damp from the decorating still?
painting .
A gallon of water-based emulsion, containing nearly a gallon of water?
How long ago?
Dehumidifiers cost money to run, ventilation is free.mid summer. Plus we have used the dehumidifier for several hours the other day. I doubt emulsion paint would be still hanging around, or at least I’d hope not!
Dehumidifiers cost money to run, ventilation is free.
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