We're having some construction done requiring treated soleplates on concrete slab.
As such, galvanized nails were used. However, they don't appear to be hot-dipped. My understanding (going back several years when I was building a deck back when ACQ was relatively new) is that hot dipped is a requirement for ACQ treated lumber.
So I went to get some, but then noticed that a lot of the galvanized nails at Home Depot now say "for all treated wood" even though they clearly aren't hot dipped. Here's an example.
Has technology changed a bit and are there now galvanizing methods that are suitable for ACQ that aren't hot dipped? Or is this some shoddy product claims?
I obviously don't want to re-nail every stud to the sole place if it's necessary, but at the same time, I want to make sure the hardware is suitable for ACQ use.
Best Answer
There are different levels of zinc galvanization. If you want it to last longer, then get a thicker layer of zinc on the outside of the steel.
One way to get a thicker layer is to hot dip galvanize it. Another way is use a Simpson hanger that is Z-max plated which is basically just twice electrogalvanized steel plate and actually not hot dipped.
If it's galvanized just a little bit, it'll technically be okay for treated lumber. If you want it to last longer, then get more galvanization on there. Zinc is a sacrificial coating, so as it corrodes it protects the steel less and the steel will begin to rust.
Yes, I would definitely be worried about non-specific product information. If it just says it's galvanized, then assume it's the least amount possible. They'll brag about anything better than the minimum basic electroplating. Look up Simpson's Corrosion Resistance Recommendations and Classifications to determine your environmental situation and its requirements.