Tony Bryer wrote:
On Thu, 28 Sep 2006 09:12:22 +0100 The Natural Philosopher wrote :
Dig trial holes down the side. They almost certainly will not be,
as regulations have got more stringent in this area.

We were insisting on 1m min deep foundations back in the late 1970s and
I would have thought these OK for most two-storey extensions


YOU might have been insisting, but my niece recently underpinned a whole
length of 1970s extension that had been tre-rooted as it were, and apart
from the 500mm strip foundations and the rotting wooden lintels over the
windows, I can say the general standard of construction was utter crap.

They insisted here on a minimum of 1.5meters, and up to 2.5 meters in
places on similar soil with tree roots.