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I hope not, as I have the same. My reading said it was fine and almost unavoidable at the ceiling/wall joint. Its why coving was invented. The cracks in my kitchen are almost a millimeter but appeared almost as soon as we moved in and haven't worsened in over 2 years. Out place was done up very cheaply before we moved in so we have quite a few hairline cracks that I just need to get around to attending to.
Should I be worried about this cracking?
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