Pressure Treated Lumber NO-NO

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Forum topic by Handtooler posted 08-17-2012 06:14 PM 2304 views 0 times favorited 6 replies Add to Favorites Watch
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1236 posts in 1222 days

08-17-2012 06:14 PM

Brother and sister Lumberjocks, Just a heads up! Don’t wrap a pressure treated post or plank in an outdoor porject with aluminum sheetmetal. I replaced a support post in our breezeway this past spring and since we’ve had an extremely hot June this summer the wrap of white painted aluminum is now blistering, cracking and popping open. Looks a lot like a garden toad. It’s gonna be ugly by winter I suspect. I believe the culprit is the copper in the treatment solution is not compatable with the wrap. Russell

-- Russell Pitner Hixson, TN 37343

6 replies so far

View Doss's profile


779 posts in 1354 days

#1 posted 08-17-2012 06:56 PM

Yes, you should be using copper, pvc, maybe galvanized in a pinch, or wrapping your PT lumber (they make asphalt, rubber, and other membranes for wrapping) if you want to use aluminum.

What you are experiencing is galvanic corrosion attacking the aluminum.

-- "Well, at least we can still use it as firewood... maybe." - Doss

View Dallas's profile (online now)


3571 posts in 1577 days

#2 posted 08-17-2012 07:49 PM

Well, at least you didn’t make an end grain cutting board for the local butcher shop!

-- Improvise.... Adapt...... Overcome!

View treaterryan's profile


109 posts in 1377 days

#3 posted 08-17-2012 07:51 PM

The copper is the culprit.

-- Ryan - Bethel Park, PA

View Handtooler's profile


1236 posts in 1222 days

#4 posted 08-17-2012 08:35 PM

Thanks Dallas, I appreciate your humor. And, I certainly wasn’t trying to be a smart * in my earlier post. Russell

-- Russell Pitner Hixson, TN 37343

View Dusty56's profile


11781 posts in 2778 days

#5 posted 08-17-2012 10:03 PM

The new and improved pressure treating chemicals….kinda makes you want to wear gloves when handling it , ay ?

-- I'm absolutely positive that I couldn't be more uncertain!

View Jeff in Huntersville's profile

Jeff in Huntersville

402 posts in 2284 days

#6 posted 08-17-2012 10:17 PM

It’s a small positive but you made yourself a free source of a very tiny amount of electricity.

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