On Tuesday 14 May 2013 10:16 Dave Liquorice wrote in uk.d-i-y:

On Mon, 13 May 2013 20:48:30 +0000 (UTC), Jules Richardson wrote:

a) What's a good type of gravel to use? ISTR local concrete firm
suggesting pea gravel

I'd have thought you want something that will lock together and compact
to a firm base, like MOT1 this side of the pond. Crushed stone straight
from the crusher, so 20 or 40mm down to dust, compacted with a
vibraplate.

I agree. Pea shingle is noted for being able to move easily - the last thing
you wnat for hardcore. This is why pea shingle is poured around drain pipes
- to allow them to be free of ground movement.

Yep:

http://www.pavingexpert.com/subbase.htm

Really for a drive than patio but you still need a good base.


Indeed. Even if a patio will not see much load, ants are little buggers at
rearranging what's under the flags if it's just soil and sand. They love it
- roofed house I suppose...

3" of MOT/ballast whacked down should be enough for light use.

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