A couple of years ago we had professional installers
install what's commonly called a chain link fence
surrounding our yard 'cuz dog.

They dug holes for the posts, mixed up some cement,
pushed the posts into them, then backfilled the top
few inches with more soil.

Sure enough, the posts and their concrete bases have
been creeping up and out.

Any suggestions as to how to fix this (presumably
need to re-dig) and prevent the problem from recurring?

Thanks muchly.

__________________________________________________ ___
Knowledge may be power, but communications is the key

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On 6/3/2020 7:47 PM, danny burstein wrote:
A couple of years ago we had professional installers
install what's commonly called a chain link fence
surrounding our yard 'cuz dog.

They dug holes for the posts, mixed up some cement,
pushed the posts into them, then backfilled the top
few inches with more soil.

Sure enough, the posts and their concrete bases have
been creeping up and out.

Any suggestions as to how to fix this (presumably
need to re-dig) and prevent the problem from recurring?

Thanks muchly.

__________________________________________________ ___
Knowledge may be power, but communications is the key
Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*
[to foil spammers, my address has been double rot-13 encoded]

You have some burly moles there.

On 6/3/2020 7:47 PM, danny burstein wrote:
A couple of years ago we had professional installers
install what's commonly called a chain link fence
surrounding our yard 'cuz dog.

They dug holes for the posts, mixed up some cement,
pushed the posts into them, then backfilled the top
few inches with more soil.

Sure enough, the posts and their concrete bases have
been creeping up and out.

Any suggestions as to how to fix this (presumably
need to re-dig) and prevent the problem from recurring?

Thanks muchly.

__________________________________________________ ___
Knowledge may be power, but communications is the key
Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*
[to foil spammers, my address has been double rot-13 encoded]

In what climate is the fence and how deep are the holes? Could freezing
ground be heaving the posts? Perhaps a call to whomever installed the
fence may provide some insight. Good luck.

On Thu, 4 Jun 2020 02:47:14 +0000, danny burstein
wrote:

A couple of years ago we had professional installers
install what's commonly called a chain link fence
surrounding our yard 'cuz dog.

They dug holes for the posts, mixed up some cement,
pushed the posts into them, then backfilled the top
few inches with more soil.

Sure enough, the posts and their concrete bases have
been creeping up and out.

Any suggestions as to how to fix this (presumably
need to re-dig) and prevent the problem from recurring?

Thanks muchly.

_________________________________________________ ____
Knowledge may be power, but communications is the key

[to foil spammers, my address has been double rot-13 encoded]


It may be the opposite problem. The soil may be receding exposing the
bottom of the posts. I have had this problem, especially before I
convinced my lawn service to NOT trim the grass extremely short next
to the fence. Using weed killer along the fence line is another way to
promote erosion.

-dan z-



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In slate_leeper writes:

[snip]
It may be the opposite problem. The soil may be receding exposing the
bottom of the posts. I have had this problem, especially before I
convinced my lawn service to NOT trim the grass extremely short next
to the fence. Using weed killer along the fence line is another way to
promote erosion.

Thanks. I gave that some serious thought but some of the
posts are close enough to the house that I could compare
the height to the walls, and yeah, it's that they're coming
up out of the ground.

And thanks to everyone for the other suggestions.


--
__________________________________________________ ___
Knowledge may be power, but communications is the key

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On 6/3/2020 11:17 PM, RosemontCrest wrote:
On 6/3/2020 7:47 PM, danny burstein wrote:
A couple of years ago we had professional installers
install what's commonly called a chain link fence
surrounding our yard 'cuz dog.

They dug holes for the posts, mixed up some cement,
pushed the posts into them, then backfilled the top
few inches with more soil.

Sure enough, the posts and their concrete bases have
been creeping up and out.

Any suggestions as to how to fix this (presumably
need to re-dig) and prevent the problem from recurring?

Thanks muchly.

__________________________________________________ ___
Knowledge may be power, but communications is the key
Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*
[to foil spammers, my address has been double rot-13 encoded]

In what climate is the fence and how deep are the holes? Could freezing
ground be heaving the posts? Perhaps a call to whomever installed the
fence may provide some insight. Good luck.

Also sounds most likely to me.

I did not have this problem with my old deck as described last year but
new code required setting concrete post supports three feet below ground
because of frost line.

I just found this on decks:

https://www.decks.com/how-to/264/dec...rost-depth-map

and assume it could apply to op's problem.

On Thu, 04 Jun 2020 09:09:15 -0400, slate_leeper
wrote:

On Thu, 4 Jun 2020 02:47:14 +0000, danny burstein
wrote:

A couple of years ago we had professional installers
install what's commonly called a chain link fence
surrounding our yard 'cuz dog.

They dug holes for the posts, mixed up some cement,
pushed the posts into them, then backfilled the top
few inches with more soil.

Sure enough, the posts and their concrete bases have
been creeping up and out.

Any suggestions as to how to fix this (presumably
need to re-dig) and prevent the problem from recurring?

Thanks muchly.

________________________________________________ _____
Knowledge may be power, but communications is the key

[to foil spammers, my address has been double rot-13 encoded]


It may be the opposite problem. The soil may be receding exposing the
bottom of the posts. I have had this problem, especially before I
convinced my lawn service to NOT trim the grass extremely short next
to the fence. Using weed killer along the fence line is another way to
promote erosion.

-dan z-
Don't say where you are or how cold it gets - or how deep they dug.
Generally that happens when frost in poorly drained soil gets under a
post that is not burried deep enough or the frost catches the side of
the post and lifts it. Around here it is common to use SonoTube as a
form and to bury the post 4 feet deep. Sometimes a "cone" footing is
used to help keep the post from coming up as well. Even with ALL the
precautions, it is almost inevitable that a post or two will STILL
"float" to the surface eventually.

[snip]

Thanks again to everyone who wrote.

We're in a residential neighborhood in flyover country, with
the temperatures about five degrees, on average, colder than,
oh say, Chicago.

So yeah, lots of freezing.

The company that did the initial installation
has been around for a couple of decades, so
I'd have thought they knew about this issue...

Fortunately, we've still got another year or five
before we "have" to address the problem.

Thanks again.


--
__________________________________________________ ___
Knowledge may be power, but communications is the key

[to foil spammers, my address has been double rot-13 encoded]

On 6/4/2020 2:48 PM, danny burstein wrote:
[snip]

Thanks again to everyone who wrote.

We're in a residential neighborhood in flyover country, with
the temperatures about five degrees, on average, colder than,
oh say, Chicago.

So yeah, lots of freezing.

The company that did the initial installation
has been around for a couple of decades, so
I'd have thought they knew about this issue...

Fortunately, we've still got another year or five
before we "have" to address the problem.

The other possibility is heavy clay soils with wet/dry cycles will act
about the same as frost heave as they also expand when rewetted after
drying out.

If the digging concentrated clay in some of the holes relative to others
could explain differences between various post locations...or areas that
were disturbed during house construction might have more clay brought up
to the top levels.

--

In dpb writes:

The other possibility is heavy clay soils with wet/dry cycles will act
about the same as frost heave as they also expand when rewetted after
drying out.

If the digging concentrated clay in some of the holes relative to others
could explain differences between various post locations...or areas that
were disturbed during house construction might have more clay brought up
to the top levels.

Ahhhh, that's probably it. The "soil" here is just a couple of
inches, sometimes less... of dirt and right below it is clay.

Causes all sorts of grief for plants and trees..

Thanks!

--
__________________________________________________ ___
Knowledge may be power, but communications is the key

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On Thu, 4 Jun 2020 17:15:13 -0500, dpb wrote:


References:
Good idea to ALWAYS put crushed stone about 6 inches or so feep in
the bottom before the "footing" is poured