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Step into the light, and I'll tell you how its done..."BUT"

Posted by John 2000 on January 31st, 2001 01:47 PM
In reply to Dig basement under existing house? by Jon on January 31st, 2001 01:02 PM [Go to top of thread]

7 of 7 people found this post helpful

Hi", Don, you can build a new foundation under the
one you have now, and this is how you can do it.
You will have to make a shutter box 3ft long by the
width of your foundation you have at the moment.
dig out from under the footing a hole 3ft,6ins long
by the depth you want, now cut some rebars about 2 foot
longer than the 3'6', now pass the rebars into the hole
you've made and push the bars in to the soil 12" one way
and 12ins the other, now build your shutter board, so when
you pour in the concrete it fills up to the back wall (soil)
and each side of your box (soil) and dont forget to make some
shouring timbers so that the weight of the concrete does not
move your shuttering. ok, thats do, and now fill.
now the trick is not to let the foundations hang in the air,
so now you go across to the other side of the room and again
do the same ( a hole 3.6" with bars coming out that extra
12" both sides,. now that the concrete is set, take away the
shuttering and do it all again ( to the left or to the right
but it must be done every 3ft and not more, ( this way the old
foundation is still on the ground, when you have done all the
basement area at every 3ft, and the concrete is hard, you are
now ready to do it all again but this time takeing away the
soil between the concrete you have made, and you should have
the rebars sticking out each end of the concrete, wire tie
new rebars so that you have all the bars overlapping and tied
now fit you shutter and fill,.....
This way you do not have to strain the old foundations and you have
built a new foundation under the old one, this way is a bit long winded
but it can be done ( and remember NO MORE THAN 3'6" wide in any hole
you make,. think whats above it,
If you can get the plans for your house you should also have the rebar
lay out too, follow them and do the same,
"BUT" this is up to you, talk to a builder who know about concrete and
see what he says.........John 2000

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  • Thanks by JON  1/31/01 07:39 PM

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