Just noticed the corner of an upstairs bedroom is dripping wet. Black mould is forming above and below on the skirting. Its a 1930's semi, no insulation in walls, so I'm guessing its the temperature differential between room and exterior of wall that's causing it. There is a vent on the wall that I blocked last winter as the temp in the room was dropping to 13C overnight (from 20 - 21C). Presumably I need to unblock it again, as the room has been dry for 5 years? Any way to have a warm AND dry room??
Damp problem
- Thread starter grimep
- Start date
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The temp drop is probably as much to do with poor insulation as the vent.
When you warm up a room, more moisture can be held by the air. When the air cools the vapour will condense on the coldest surface.
To have a warm and dry room it's really necessary to keep it warm and allow some ventilation.
When you warm up a room, more moisture can be held by the air. When the air cools the vapour will condense on the coldest surface.
To have a warm and dry room it's really necessary to keep it warm and allow some ventilation.
Ventilation is the problem, you need to open up the vent.
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