I was working on a job where they were building a screened porch. The GC is wrapping all the ACQ treated framing with coil stock that in big bold letters on the box says….
“DO NOT USE ON TREATED LUMBER”
So anyone have any idea how long before it starts falling apart and I should drop a card off?
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Replies
Drop a card off? Depends on your relationshiop wigth the GC
I'm guessing the GC is a guy, since we don 't have to read instructions.
"All I've got to do is act naturally ....:
"
From what I've heard, it may last a year before it starts looking like swiss cheese, especially if the backside is mill finish. Maybe longer if the coil stock is painted. If they are using aluminum coil stock nails, those will likely be gone in a few months and the wrap will probably be blowing off before it has a chance to dissolve.
Oh good. I just put up new pressure treated mailbox post and added aluminum house numbers held on by aluminum nails. Maybe I'll find them on the ground in a few months.
"With every mistake we must surely be learning"
It really needs moisture for the ACQ to really go after the aluminum. But I think a lot of the fuss is just the fear of the unknown. I took down a 2 year old deck at my sisters place to put up a much larger deck. The flashing at the ledger was bare aluminum and it was fine, no signs of decay. The house also does not have gutters, so there was plenty of water to keep the PT wet.
That being said, I would not use aluminum around PT, I think the zmax galv and hot dipped galv are just fine.
I have seen prefinished aluminum coil stock fail within six months when wrapped around ACQor CA-B treated lumber. It started to corrode around the nails and continued from there. If I were to wrap coil around treated lumber, I would first wrap the lumber with felt, tyvek or some other separation barrier.
Dang I am glad I work with copper. No worries, ever.
Spheramid Enterprises Architectural Woodworks
There is no cure for stupid. R. White.