Pressure Treated Lumber NO-NO

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Forum topic by Handtooler posted 740 days ago 1567 views 0 times favorited 6 replies Add to Favorites Watch
View Handtooler's profile


1073 posts in 764 days

740 days ago

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 896 days

#1 posted 740 days ago

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


2869 posts in 1119 days

#2 posted 740 days ago

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 919 days

#3 posted 740 days ago

The copper is the culprit.

-- Ryan - Bethel Park, PA

View Handtooler's profile


1073 posts in 764 days

#4 posted 740 days ago

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


11644 posts in 2320 days

#5 posted 740 days ago

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

399 posts in 1826 days

#6 posted 740 days ago

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

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