"hands on" wrote in message
...
On Sep 5, 8:23 am, Wayne Boatwright wrote:
On Fri 05 Sep 2008 04:03:30a, hands on told us...

MY 3 year old house built on a concrete slab has a new crack I found
(the 6th one) in the floor of a room where I was removing builder
(Veranda Homes LLC) installed carpet. The crack is 14 feet long and at
one end was a bad patch job that was a 1 1/2 foot hole.
I tapped on the patch area to find that it sounded hollow, then the
patch crumbled.
I found that my slab is only 2-3 inches thick in this area and not the
required 4 inches by building code.
How do I repair this hole?
Builder is uncooperative.House is only 3 years old.
http://verandahomessucks.com/

Dig a deeper hole and pour more concrete.

--
Wayne Boatwright

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Date: Friday, 09(IX)/05(V)/08(MMVIII)
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Countdown till Veteran's Day
9wks 3dys 18hrs 37mins
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Everything's a lie, and that's a fact.
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The original concrete was supposed to be fiber reinforced, what kind
should I use to fill the hole?
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My fiber reinforced concrete slab cracked after 10 years, the contractor
should have used rebars. I would just get a few bags of premixed concrete
either regular, high strength or fiber reinforced and it doesn't make all
that much difference. Make sure the earth is well compacted, I would make
the new pour 6" deep, throw a generous amount of rebar all around with tie
wires and pin it to the existing slab to anchor it in place.