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Something I've wondered for a while: Is there a difference in galvanized materials? Well, I KNOW there is, but don't know the difference. We built a pool deck back in 2000 and we used ALL galvanized screws. We ended up using two 25# buckets. HALF of our screws have now rusted to the point that the heads are breaking off (not good around a vinyl lined pool).
So, I know there are some galvanized that will rust; anyone know the difference?
Yes there is 2 different types of galvanized metal..............So i really dont want to freak you out but there is a good chance if your deck was built in 2000 and you used pressure treated lumber that the wrong fasteners were used. When the pressure treated lumber switched from ACQ to CCA they found one really big problem...The new CCA lumber is very very corrosive to metals......This has since been addressed by companies making screws etc but there were alot of issues...including collapsing decks in some cases..
Regular galvanized screw, lags, bolts etc will not hold up in CCA lumber.
Did you build it? did a contractor? Do any of the boards still have a tag or stamp you can read?
If you google ACQ and CCA lumber you will find a ton of info.....
Either way if you have screws breaking out of your deck be sure to check out the stability and call someone if you need to. More than just the screws are rusting if that is the case ..............which I hope its not