On Sun, 30 Sep 2001, Brian Kennedy wrote:
:
:My neighbor has a cottage on a slab that's been 'sinking' for the last 60
:years or so. The slab is broken and they've used scraps of wood to provide a
:'level' floor which is now above the sill plates. The slab is now about 6"
:below grade and every thing is pretty well rotted. He can't afford to tear
:is all out and redo it properly. His latest thought is to dig out around the
:outside and just fill it in with cement to stabilize the mess. He's also
:thought about raising the wall a bit and replacing the sill plates with
:treated lumber.
:
:Any thoughts on this one?
The professional solution are some sort of pier. Basically, they drill a
hole in the slab, and force a steel pipe down into the ground, attaching it
to a plate on the slab. There's a similiar technique with concrete forced
in under pressure. That's expensive, though -- $500 or so per pier. The
number needed depends on the size of the structure, and the soil conditions.
It might be possible to support the outer edge of the slab with a series of
steel posts, which is lots of labour, but would't require much skill or
special equipment. If you're somewhere where it's very dry, waterng the
foundation might help.
--
dscheidt@tumbolia.com
Bipedalism is only a fad.
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