john west++++ wrote:

hi, we have a small wooden garden shed on a cast concrete base. the shed
is pretty rotten so we want to replace with a larger breeze block
construction shed ( that's if breeze block is the cheapest kind of shed to
build, that's not wood. [guess breeze blocks will work out cheaper than the
pre fabricated kind of concrete sheds you can buy anyway?])

my question is; since i am going to need a larger concrete base, should i
smash up the existing one or is there a satisfactory way to 'key in' a piece
of new larger concrete base onto to the existing one.
many thanks for any advice. yours, john west




Either. You may want to put in a bit more depth of a foundation, which
means digging down the side of the existing.

OTOH a quick and dirty way to get most of what you want is to dig back a
little around teh edges, shutter up, and pour a ****laod of new concrete
on top of everything.