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Posted by Rudy on June 26, 2006, 3:08 am
> 1) Lay down a layer of gravel over the existing tampered excavated
> area.
> 2) Lay down a polystrene foam insulation.
> 3) Pour concrete with a rebar mesh to re-inforce (I'll also need to
> paint a bonding agent down on the old concrete floor edges to ensure
> the new floor bonds to the old).
So, you're cutting new "trenches" thru the concrete floor, doing the new
plbg, then replacing the crete
I.ve done this and seen it done and I'll go along with #1 above, forget #2&
3 unless theres foam or a vapor barrier (plastic sheet) under there already.
If not, there isnt much point in dropping in narrow trench strips of foam
IMO.
Just wet down the cut or broken edges for a bond, this stuff isnt going
anywhere since you're tamping the fill before pouring.
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