05:42PM | 03/24/04
Member Since: 03/23/04
3 lifetime posts
Hi all....

Just a quick question. How long will a treated 4x4 last if buried in the ground. Will this period be diminished if it is buried in concrete? Lastly, is there any recommended treatment that can be applied to the 4x4 to extend it's life? Appreciate your time and thanks for taking the time to look!



10:16AM | 03/27/04
Member Since: 11/06/02
1284 lifetime posts
part of the answer can depend on soil type, water level, and climate, as well as kind of PT lumber.

In the pacific region of America, you could be talking about incised doug fir with pt whick doesn't penetrate as far into the wood as SYP PT

There are levels of saturation too.

.4 for above ground

.6 for ground contact

.8 for immersion

and the enviro wackos made such a stink about a product that they could not prove was hurting anyone that the lumber industry has changed formulae so that no-one is sure.

when the govt made the painting industry take all the VOCs out of paint, the quality went downhill drasticly so we could be looking at the same result in PT lumnber. WE already know that the hardware corrodes faster.

That said, 30-40 years should be a decent estimate.

You can paint it with compounds like Osmose having copper in it to extend lifespan some more.

Excellence is its own reward!


02:19AM | 03/28/04
Member Since: 03/27/04
28 lifetime posts
"and the enviro wackos made such a stink about a product that they could not prove was hurting anyone that the lumber industry has changed formulae so that no-one is sure." actually at places like fort christmas in florida they found alarming levels of toxins in peoples systems that worked there from day to day insde the recreated wooden fort. the old fashioned non-enviro friendly way to make any post treated any way last long is to paint the ground contacting end with blackjack. you could also dip the ends of a resistant wood like ceder or cypress in copper tox and that should last a lot longer then the poor quality pt woods.

Excellence is in the mind of the beholder!


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