On 3 Aug 2006 10:59:02 -0700, "jonpoi" wrote:

The previous addition was done later after the house was originally
built.
Digging a trench would be tough because of the crawlspace.

Start from beyond the corner, and dig from inside the trench.
It will be awkward anyway, but so what? Work is good for you.



I was wondering if maybe the plywood face could be removed then slide
new support beams in for extra support?


Goedjn wrote:


4' is a really long cantilever.
The simplest thing to do, depending on what's under the
actual edge of the house, would be to dig a trench under
than edge, put in a footing, and 4 posts up to
a crossbeam under the sagging section.

But the thing is, since the area is enclosed, why did
they cantilver it like that in the first place? There
may be something there that makes trying to put in
a footer unwise.