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Hairline crack on ceiling
Hi, need advice for hairline ceiling crack repairs. Had two plasterers coming yesterday to repair the hairline ceiling crack lines. Two lines were not long at all. The guy went up the roof and he said put timber in and screw the ceiling crack area then patching. He didn’t put on mesh tape or paper tape on hairline crack lines during coating. I asked him why didn’t. He said no needs. Today I can see the line there on ceiling after patching. Any advice pls?
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Re: hairline crack on ceiling
I have found that hairline cracks aren't possible to fill because not enough filler can get in, so you end up with a super thin coating over the top that falls off like dust when dry. The best way I have found is to run the sharp corner of a scraper along the crack to make it a V shaped crack. Then it has depth and enough surface area for the filler to properly adhere to. Then fill that crack and sand it flat when dry.
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Re: hairline crack on ceiling
Thanks for the tips, the plasterer did that. He also put a timber on another end of ceiling under roof as he claimed it caused by structure movement, I have no ideas and the hairline crack was not long anyway. I only found a bit strange why he didn’t put tapes on that line and patching it. He told me no needs to do it.
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Re: hairline crack on ceiling
I would imagine that putting tape over the crack would then introduce 2 more fine lines at each side of the tape that would need to be covered. Then he would have to add a coating over the tape to hide those tape edges, which would result in a mound on your flat ceiling. This could be blended in by making it wider, but it seems like it would add more problems than it solves. The thing with ceilings is that bright light often shines across them, so any variations in thickness looks worse than it does on a wall, where the light usually arrives from many angles. (Try shining a torch along a plaster wall to see how (un)flat they are.) If the 2 edges of adjoining plaster sheets are attached closely where there is timber above the join, the tape shouldn't be needed. It may be a case of redoing the fine cracks once more now the plaster sheets have settled.
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Re: hairline crack on ceiling
Thank you for advices!
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