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Old 03-04-2017, 09:43 AM   #1
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new slab on top of existing slab???


Hi
I am converting attached open garage to enclosed garage

I am excavating perimeter for the foundation
question is
in order to avoid demolishing the existing concrete slab, Can I put the excaveted diert over the existing slab
than 6" sand than,
plastic sheet following,
some crashed rocks / gravels finaly,
rebars / wire mesh
????????

Thank you
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Old 03-04-2017, 09:58 AM   #2
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Re: new slab on top of existing slab???


If compacted properly you should be fine.
I would skip the sand and just use compacted gravel.
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Old 03-04-2017, 12:27 PM   #3
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Re: new slab on top of existing slab???


Quote:
Can I put the excaveted diert over the existing slab
Ayuh,.... How much are you raisin' the existin' slab, to the new slab grade,..??

Generally speakin', dirt don't make a good sub-base,...
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Old 03-14-2017, 02:48 PM   #4
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Re: new slab on top of existing slab???


drill holes, put short rebar in there sticking upwards. Then, repour
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