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Posted by Jerry on June 18, 2006, 11:26 pm
Jim Elbrecht wrote:
>
> >We installed a brick patio a week ago and today I rented the plate
> >compactor to go over the pavers. After going over them, one area
> >towards the side is now spongy while the rest of the patio seems firm
> >and solid. Do I need to do some kind of repair on this or is this
> >normal? Can I expect the spongy area to settle down after a while or
> >will it just get worse?
>
> I suspect you will eventually end up with a low spot. The low spot
> will collect water which will speed the process and at some point
> you'll have to repair it. But that is the beauty of pavers. Tear
> out what you have to and fix it-- leaving the rest alone.
>
> >We have a 6-inch lime-stone base that is flat and well compacted with
> >1-inch of sand between it and the pavers.
>
> You say it is "well compacted". Did you rent the compactor to do the
> base?
Yes.
> Did you wet the base down a few times as you were compacting?
It rained a little while I was compacting so I didn't wet it.
> Did you compact that whole 6" at once, or did you do it two or three
> layers?
The whole thing at once.
> I suspect your base is the problem-- or there is a geologic anomaly
> going on and a sinkhole will swallow your patio someday.
Heh, that would really suck.
--
Jerry
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