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Old 06-11-2009, 04:50 PM   #1
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Filling hole in slab


I have a hole in the slab foundation of my house. It is only about 3 inches down and 9 inches wide. Do I just fill it with Quickcrete and thats it? Thank you
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Old 06-12-2009, 05:35 AM   #2
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Ayuh,... That's It...
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Old 06-12-2009, 06:21 AM   #3
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If possible, put a piece of plywood on one side as a backer. Run some tapcon screws or similar half way in, all around the opening. This gives something for the mix to hold on to. Make the mix very dry so it won't run all over the place.
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Old 06-12-2009, 06:33 AM   #4
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Hydraulic cement may work better.
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Old 06-12-2009, 08:33 AM   #5
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Thanks for the answers. So I don't have to wet the concrete first or anything like that. Just put in the new cement and that's it?
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Old 06-12-2009, 09:36 AM   #6
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Assuming this is just a cosmetic repair (you don't plan to put heavy load above the patch), it is a simple matter of cleaning the hole by brushing to remove loose debris, mix up the concrete, place. I agree with the post about mixing it up dry, much stronger, less likely to crack. I would not be too concerned about bonding to the existing concrete, assuming this is a cosmetic fix rather than structural.

I would avoid hydraulic cement, costs more, sets very quickly, no aggregate, so is not as strong as normal concrete.
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