The Natural Philosopher wrote:
Phil L wrote:
Baz wrote:
Hi Guys.

I had my front "Lawn" (scabby bit of grass) Blocked Paved 5 years
ago. The ground is Heavy Clay.

I have a bit that appears to be Heaving. This area is next to a
drain and where a Forsythia grow for 20 or 30 years.

The contractor who laid the paving came back last year and lifted
the area and levelled it, no sign of any roots pushing up. But now
the area is back up again.
The area is about 2 meters x 2 meters and has rising about 50mm to
75mm in the middle, since last year.

Is it Heave and how long can I expect this continue?

It is heave and as TNP says it won't stop until the ground has
sorted itself out WRT moisture levels etc.

You can stop it now, but that means removing the ground...IE dig out
a fecking big hole 2m by 2m and at least a metre deep and infill
with MOT, which will have to be whacked in layers of 150mm.

A 4 yard skip, at least 5 tonne of MOT, lots of hard work and a weeks
whacker hire is what's required to do the job properly, anything
else is just cosmetic

Or just wait till it settles, and then re-lay.

IME that can take years, and in the meantime he's got to put up with a drive
that looks like a ploughed field!

--
Phil L
RSRL Tipster Of The Year 2008