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Copper Naphthenate... Opinions Options
#1 Posted : Thursday, January 08, 2009 12:54:19 PM
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Posts: 134,494

I am about to make around 500 foot of trellis, and I have access to several acres of free lumber that has been windrowed and allowed to dry off the ground for a year... however, I don't want to put this trellis up only to have it rot and attract termites.

Copper naphthenate under the trade name Termin-8 looks great. It looks like you just brush it on, giving thorough coverage, and it keeps wood from rot for years, even when you have it in contact with the soil. However, I am concerned about adverse effects on soil, honeybees, and my family when we eat crops grown on the trellis.

If you have any knowledge of this product or first-hand experience with using it, please let me know. I have looked into other treatments such as Valhalla's Lifetime Wood Treatment, but I am not sure if that protects as well against termites. Valhalla also suggests a poured concrete base for in ground posts, and I just don't have the funds to pour the 60 or so bases I would need.

Thank you in advance for your time.

#2 Posted : Thursday, January 08, 2009 12:54:19 PM
Rank: Guest

Posts: 134,494
The problem with a brushed on product is that it won't prevent the interior of the wood from rotting.

Disclaimer: I don't have any experience with Copper naphthenate

I am guessing Copper naphthenate could leach out of the wood if burred.

You might be able to treat it and then somehow seal it with a sealer to keep the interior moisture level low.

One thought would be to use one thing above ground and a different plan underground.

Above ground you need to keep the wood dry most of the time. A sealer would work here.

Below ground you need to either keep it dry or use something harsh. One thought would be to use the Copper naphthenate and then wrap it in plastic or paint it with rubber coat sealer.
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