Garage floor concrete sounds hollow

Old 06-15-04, 09:26 AM
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Question Garage floor concrete sounds hollow

I have a newer home (about 3 yrs old) with a large two car garage. I had the builder install a drain in the center that goes to the sump crock in the basement. The floor was poured in quarters all sloping towards the drain. In the last two years I've noticed that the floor near the drain sounds hollow. My questions are; how can I tell if the fill or gravel has settled? What should you do about it? What kind of problems would it lead to (like the floor breaking up in chunks)? I'm in Indiana where we have some fair winter so there is a bit if salt and snow that melts off in the garage and I like to rinse the salt off the concrete so it won't start spalling or pitting.
Old 06-15-04, 07:03 PM
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Location: Taylors, SC
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The fill supports the concrete, so its failure could result in the failure of the concrete.

How to tell if it has settled?..................

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