Originally Posted by
SLUDGE FACTORY
If its a damp or condensation problem maybe worth hiring a dehumidifier to suck out any moisture out of the walls , as long as you have used a breathable paint ......if its a wipeable matt or silk it will prevent the moisture from coming out
Failing that try using an alkali resisting primer on the patches to prevent any reaction between the paint and plaster
Or some damp seal ? But that's not always a good idea as if it is a damp problem it will just move to another area which hasn't been sealed
You may have to bite the bullet and wait until the warmer weather , stick on another coat and see what happens
As has been suggested it could be that you have an old property with a lot of moisture hanging around in the walls
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