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Posted by Matthew Reed on July 11, 2006, 3:23 pm
More on my fence building subject. I live in Oregon, Lebanon, near Salem.
Rains all year. Lots and lots of rain. I'm using pressure treated ground
contact rated 4x4x8' posts. I plan on setting them 2 feet deep in concrete.
Would it be worthwhile to apply any additional waterproofing coating to the
posts before setting them in concrete? What kind of life expentancy can I
expect from these posts set in concrete? Assuming I take reasonable care to
taper the concrete, cap the top, and keep it painted. If they rot out in 5
years, I'll be stuck with rotted posts in concrete that will need to be dug
up, and I'll have several dozen big chunks of concrete that I won't know
what to do with.
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Posted by JimL on July 11, 2006, 4:15 pm
On Tue, 11 Jul 2006 12:23:57 -0700, "Matthew Reed" <nospam at zootal
dot com nospam> wrote:
>More on my fence building subject. I live in Oregon, Lebanon, near Salem.
>Rains all year. Lots and lots of rain. I'm using pressure treated ground
>contact rated 4x4x8' posts. I plan on setting them 2 feet deep in concrete.
>Would it be worthwhile to apply any additional waterproofing coating to the
>posts before setting them in concrete? What kind of life expentancy can I
>expect from these posts set in concrete? Assuming I take reasonable care to
>taper the concrete, cap the top, and keep it painted. If they rot out in 5
>years, I'll be stuck with rotted posts in concrete that will need to be dug
>up, and I'll have several dozen big chunks of concrete that I won't know
>what to do with.
>
Sure. And pile it on thick at the very bottom especially up to
about 4 inches from the surface. (Ugly when it shows).
I've dug up lots of those concrete bottoms with broken posts in them
and it is always VERY hard work, so you are right to do what you can
when planting them.
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Posted by Bob on July 11, 2006, 5:45 pm
"Matthew Reed" <nospam at zootal dot com nospam> wrote in message
> More on my fence building subject. I live in Oregon, Lebanon, near Salem.
> Rains all year. Lots and lots of rain. I'm using pressure treated ground
> contact rated 4x4x8' posts. I plan on setting them 2 feet deep in concrete.
> Would it be worthwhile to apply any additional waterproofing coating to the
> posts before setting them in concrete? What kind of life expentancy can I
> expect from these posts set in concrete? Assuming I take reasonable care to
> taper the concrete, cap the top, and keep it painted. If they rot out in 5
> years, I'll be stuck with rotted posts in concrete that will need to be dug
> up, and I'll have several dozen big chunks of concrete that I won't know
> what to do with.
It has always seemed to me that those metal post holders that you set in
concrete would be a better bet. The end of the post will be able to breath
some, so it should last way longer. Plus, replacement would be way easier.
Bob
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Posted by Matthew Reed on July 11, 2006, 6:12 pm
>
> It has always seemed to me that those metal post holders that you set in
> concrete would be a better bet. The end of the post will be able to breath
> some, so it should last way longer. Plus, replacement would be way easier.
>
> Bob
I'm not sure I've seen these before, but I think I know what you are talking
apart. Do they hold the post securely enough to take the load of wood,
gates, etc. ?
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Posted by Chris Lewis on July 11, 2006, 6:38 pm
According to Matthew Reed <nospam at zootal dot com nospam>:
>
> >
> > It has always seemed to me that those metal post holders that you set in
> > concrete would be a better bet. The end of the post will be able to breath
> > some, so it should last way longer. Plus, replacement would be way easier.
> >
> > Bob
>
> I'm not sure I've seen these before, but I think I know what you are talking
> apart. Do they hold the post securely enough to take the load of wood,
> gates, etc. ?
No. They need side support if they're of any height or significant
side load. Same for "post spikes". Not suitable for fences or
freestanding decks (unless very short).
The trick with concreted fence posts is to bed the bottom end
of the post in several inches of gravel before pouring concrete.
Any moisture entering the post can leave out the bottom, and the
bottom isn't held in direct contact with moisture. PT posts
will last a very long time when done properly.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.
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