We have lived in our 1940 semi for over 20 years and have had no problems with damp - or so we thought! We are in the process of replastering the fireplace wall as we have recently had the old back boiler removed, and have discovered that damp is entering the wall at the base of what was the old fireplace via a concrete slab which supported the old hearth. This slab reaches down to the earth beneath the house, and has no dampproof course. Does anyone know what this was for? Is it necessary to completely remove it to stop the damp? We asked the plasterers about it and they said the concrete slab was normal for a house like ours, but didn't know why it was there.
damp coming through concrete slab in hearth
- Thread starter 2ezekial
- Start date
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I can't help much with the solutions, but would also love to get some advice. I have a 1911 terrace with damp showing at low levels on the walls around a fireplace that was taken out. The fire place is still open but when the 70's fire was removed a concrete slab was laid - I think straight onto the ground. I've done a lot of research and it is very conflicting about whether such fireplaces (or houses) should have dpc or a liner put in to prevent moisture, or left without to allow breathing!
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