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Cake day: July 7th, 2023

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  • AlpacaChariot@lemmy.worldtodiy@sh.itjust.works,..
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    19 days ago

    Definitely one to have an engineer look at. From your description it sounds like the water may have eroded under the slab, and the shear force was high enough to crack off the heavily loaded part and move it down. You need to make sure the root cause (the water) has been addressed or it could continue to erode under the slab even if you could magic some grout in there to close it all up.

    If there are any walls on top of the crack then differential movement of the foundation may cause further cracking up the building (particularly with brick walls if you have them, not sure how sensitive a timber house would be).

    Of course all of the above could be completely wrong, because I haven’t seen it in person, which is why it’s important to get someone qualified to come out and have a proper look in context.

    Source: I’m a structural engineer, it looks serious.