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Old 09-07-2010, 07:30 AM   #29
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The new sub floor looks great.. Did you just cut old floor as close as you could to base of wall and cut to fit new floor.

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Old 09-07-2010, 01:06 PM   #30
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Old floor had graciously rotted apart over the years, so it literally crumbled away. The tricky part of the shell-on sub-floor (I learned the hard way) is ensuring that you cut your plywood long enough to get under your floor channels on both sides - yet short enough to actually fit. Think flat metal tools, gentle wedging, and not-so-gentle profanity spewing. Scroll up in this thread, I got some GREAT advice from the masters and mistresses!

Tropical Storm Hermine has "informed" me of a couple small leaks...

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Old 09-07-2010, 04:59 PM   #31
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Originally Posted by Wabbiteer View Post
Cuprinolgets its name from "Copper in Oil" - copper and aluminum, copper and steel do not mix. I agree your 50/50 mix is easy working and long lasting but has no place in a forever inhabited installation constructed of pre-aged and completely consumable metals...
True Cuprinol is named for its original formulation copper-in-oil. They NO LONGER make it that way. It is now made with "propiconazole fungicide" in most formulations and other specialty fungicides for specific applications. Many interior "bathroom" latex paints and most exterior latex paint also has chemical fungicides mixed in. It seems like the added fungicide would help in preserving the wood. After-all this is not a job most people want to do more than once.
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Old 09-07-2010, 09:06 PM   #32
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The US Cuprinol site is under construction and the parent company Sherwin-Williams is no help - they have changed their formulations so many times the Internet is littered with out-dated MSDS information. The United Kingdom Company has their product info everywhere but it doesn't apply to US markets. Best that I can tell...

Cuprinol Clear Wood Preservative has (had?) a Zinc Salt.
Cuprinol No. 10 Green Wood Preservative has a Copper Salt.
Cuprinol Deck and Siding Preservative (discontinued?) has /had 3-iodo-2-propynyl butyl carbamate in it and is for exterior use only - (very weak cholinesterase inhibitor)

I can't find which blend uses propiconazole and flurox in the USA - the former is widely used on foodstuff grains (in minute quantities) while the later kills wood boring insects of concern in the United Kingdom. The only long-term hazard warning for treated areas is chance of allergic reactions.

Yes - it'd be nice to have plywood with that in every layer but a quick surface coating isn't going to stop dry-rot when moisture has wicked deep enough to allow glue failures. If there is any silicones or oils there is the chance present or future paint will fail to bond.

Its a slippery slope of what to chemically guard against for sure.


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