js.b1 wrote:


I have a suspicion piles are cheaper overall than a good raft (say
3-4ft thick) simply re labour vs concrete, concrete has fairly risen
in price.

I used strip foundations and suspended floor of concrete. Piles would
have been similar cost to strip. At least strip can be ripped out fast
with a digger, and poured fast too.

Don't want a slab floor on clay if possible. Or rest it on polystyrene
and rebar it so its strong in itself, and the poly takes the heave.