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Posted by on August 25, 2008, 1:09 pm
On Aug 25, 12:32=A0pm, kellyjon...@gmail.com wrote:
> Recently - back in May - =A0we removed a buried fuel storage tank. =A0We
> dug out about 6' deep, maybe 8 feet wide, and 12 feet long. =A0The hole
> was refilled by the excavator, and though the excavator did a bit of
> 'tamping' with the bucket, not a lot of soil compaction was done.
> Since then, the soil has sunk maybe 8 inches. =A0This is in Western
> Oregon; the soil is mostly clay.
>
> We'd like to put a flagstone or paver patio over this area. =A0What type
> of soil prep is necessary? =A0Do we need to re-excavate the entire pit,
> and refill/recompact layer by layer with a jumping jack? =A0Or can we
> get away with a shallower re-excavation? =A0Or is there some way to do
> it with no excavation at all?
>
> Is there some more expedient way to accomplish this? =A0Just looking for
> the lowest cost/effort way to prep this area for the patio, without
> having to worry about re-doing it in a few years.
>
> Thanks,
>
> Kelly
You can get away with a shallow excavation IF you dry lay the
flagstone. Expect it to settle. If you dry lay it, then you just
life the flagstone and add sand as needed. No problems with cracks or
other problems because you can easily fix them.
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