On Sunday, October 26, 2014 8:37:38 PM UTC-4, Ashton Crusher wrote:
On Sun, 26 Oct 2014 04:51:11 +0100, nestork
wrote:


If you're going to be doing this over, then you really should have a
layer of landscaping fabric under the crushed limestone or sand. That
landscaping fabric prevents the sand or limestone from dissipating into
the ground below it so that the base of the concrete doesn't get weaker
with time. So, from bottom up it's ground, landscaping fabric,
compacted crused limestone (or sand) and then concrete.

Phone any company that does paving and see if they use something other
than landscaping fabric. The stuff I saw looked like landscaping
fabric, and serves the same purpose, but it might have been a heavier
gauge of landscaping fabric used in construction. For a small job like
this, though, it might be more economic to fold landscaping fabric over
to get double or triple the thickness rather than buy the stuff the
construction companies use.


I don't see the point to the landscaping fabric in this case, it's
just one square out of many,... if he simply levels the dirt and
compacts it some he's already miles ahead of what's under the other
90% of the squares.

I agree that I don't see the point in landscape fabric under concrete
either. But you do need a stabil base, which isn't compacted typically
just compacted dirt/soil.
Typically you have to dig down to something that is solid, eg gravel
layer, then fill with a stabilized base material, eg more gravel,
crushed rock, etc.