Wall cracks: major problem or just plaster?

I have just noticed a crack on my spare bedroom internal wall coming down from ceiling to above window and then a larger crack below . I had outside rendered 2 years ago as I had bad damp issue its all dry out now the walls and around window need replastering when I get the money as its only a spare empty bedroom. .what could be the cause could it be major problem or just plaster cracking any advice appreciated

3 Answers

Once damp plastering dries out it usually cracks and leaves stains. As you have now sorted the damp I would think it will now be the case of skimming the wall and decorating. I would still advise you to get a trade in to check it
2nd Jul 2024
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Paul Smith
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This could be due to movement an external cracks running through into the internal space. This would be an external fix with Harley fix bars proxy resin into the Pointing joint. One bar every four courses but a 1 m 500 through either of the crack then it will have to be a repair internally.
9th Jul 2024
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Depending on the pattern of the crack(s), size, length this could be of a minor structural failure however the probable cause of this crack appearing in the window region is the quick drying of the plastering on the inside. As you had prior damp issues before rendering outside, probably the wall around the window (and not limited to) was constantly damp and now with the issue solved on the outside, the inside dried quickly and due to shrinkage of the plaster these cracks appeared.
9th Jul 2024
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