John,

The process is called underpinning and is performed regularly without damage
to the structure above. It's not a complicated job for a building the size
of a home, but there are several methods and you really need site specific
direction from a local engineer.

Tom

Hi,

Our N.Z. timber house is on a slope. The side of the house facing the
valley has concrete foundations that are very, very shallow (probably no
more than 8-10 inches deep). My guess is that when it is raining very
very hard, and for a long time, the foundations can move a little bit.
Another issue is when kids are playing with the garden hose... (ouch!)

We've had to replace one foundation that was kind of going down the
valley actually.
Four other concrete foundations could be replaced.

The inside of the house is quite new, I'm scared that the repiling
process may damage the nice work that been done inside.
Is the repiling process safe? Is the house likely to move when repiling?

The house is on clay.

Any opinions?

Thanks for any advice.