Damp on chimney brest

Joined
30 Dec 2012
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Location
Essex
Country
United Kingdom
I have a 1930 semi, in the lounge we have damp on the chimney breast. The top is capped with a vented cowl. Is the damp coming from the floor? The fire place is not used and has a fake log burner installed. This is an internal wall with the neighbour. I’ve attached an image it is like this on the other side. View attachment 379069
 
Gypsum plaster used where lime plaster should of been used?
That causes damp that's trapped
 
Chimney can get damp though.

Never any damp course under floor there and also condensation from where warm moisture in the air hits cold, you get condensation.

Think you need advice from damp specialist
 
Poster# 2 and #4,
Why would "lime plaster" have been used instead of gypsum - as far as we can see thats not a remedial repair?
Using the term "lime plaster" is also wrong in this context - a mix of "lime render" at 3:1 sand and NH lime is the correct remedial render mix.
 
Last edited:
OP,
Why not post pics of the whole chimney breast?
Does the neighbour have damp issues on the party wall?
Is the floor solid or suspended?
Have you ever had the flue swept?
 
I’ll do some pics of it, floor is solid, neighbour doesn’t have issue. Not had chimney swept as it’s not used. I knocked the breakout out a few years back. Was hoping to sort this summer.
 

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