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Hi all. Looking for advice in how to handle a damp spot in new plaster skim. Solid brick walls
This spot has not fully dried out. When it rains or is humid in the room, the patch gets bigger (second pic). There is no external indication of water being able to get in here but previously there looks to have been some holes filled in with filler internally that correspond almost exactly to where this spot is, so I wonder if that has something to do with it.
Do I need to hack off plaster and see what is going on below? If it is old filler having an effect here, what would I need to replace it with?
Alternatively, is there a type of paint that is can use that will be able to hide this? I have read that one can apply salt neutraliser to stop efflorescence then paint. Is that correct?
Many thanks for any help.
This spot has not fully dried out. When it rains or is humid in the room, the patch gets bigger (second pic). There is no external indication of water being able to get in here but previously there looks to have been some holes filled in with filler internally that correspond almost exactly to where this spot is, so I wonder if that has something to do with it.
Do I need to hack off plaster and see what is going on below? If it is old filler having an effect here, what would I need to replace it with?
Alternatively, is there a type of paint that is can use that will be able to hide this? I have read that one can apply salt neutraliser to stop efflorescence then paint. Is that correct?
Many thanks for any help.