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-   -   Lifespan of galvanized nails in PT lumber (http://www.diychatroom.com/f19/lifespan-galvanized-nails-pt-lumber-10280/)

Clutchcargo 07-30-2007 01:37 PM

Lifespan of galvanized nails in PT lumber
 
What is the lifespan of galvanized nails in pressure treated lumber?
I'm rebuilding my portico entry, largely using PT stock (rafters, posts, nailing 2-2x stock together, etc). Should I be concerned with the lifespan of the fasteners?

warnerww 07-30-2007 01:48 PM

Galvanized are what you should use, they are supposed to last forever (not sure how long that is).

SecretSquirrel 07-30-2007 02:12 PM

I'd be more concerned with the lifespan of the PTL.

From the Maze nail web site;

Quote:

Maze STORMGUARD galvanized nails have passed the ultimate test with flying colors over 85 years of field service with a record unmatched by any other zinc-coated nail producer.
For your reading pleasure:

http://www.mazenails.com/hdgspecs.php

fhivinylwindows 07-30-2007 02:36 PM

Quote:

Originally Posted by Clutchcargo (Post 55272)
What is the lifespan of galvanized nails in pressure treated lumber?
I'm rebuilding my portico entry, largely using PT stock (rafters, posts, nailing 2-2x stock together, etc). Should I be concerned with the lifespan of the fasteners?

YES!

Vendors that do not have the inventory dollars to stock stainless will tell you that galvy is fine and not to worry. Spend some time on google researching the topic before wasting your time and money.

my 2 cents

warnerww 07-30-2007 03:25 PM

Ok I know I said galvies will last forever (I have never seen them fail but I do live in a dessert climate). Stainless will last and last also. I hate driving them though because they are so soft the things really like to bend.:furious:

Clutchcargo 07-30-2007 03:36 PM

The new PT stock has only been out for 4 years, that's why I'm wondering about the new heavier coated galvanized nails.
I read someplace that the galvanized nails should outlast the service life of a deck, but realistically, what's that, maybe 20-25 years?

warnerww 07-30-2007 03:49 PM

Depending on where you live and what you use decks can last a long time. I fully expect my decks I built on my house to last 50 or more years. I used pt everywhere went down 2 feet with sona tubes and used composite decking. So far it has been only 12 years but they look as good as the day I built them. I will let you know in another 38 years if my expectations worked out for me.

concretemasonry 07-30-2007 04:02 PM

Lifespan of galvanized nails in PT lumber
 
It only takes a scratch or chip in the galvanizing to make it like a normal nail in short order.

That is the reason for the failures of galavanized screws in steel studs if moisture is present.

fhivinylwindows 07-30-2007 04:05 PM

http://www.strongtie.com/ftp/catalog...-p010-p011.pdf

jogr 07-30-2007 04:16 PM

Warnerww - you probably used CCA 12 years ago. This new ACQ is highly corrosive. In an outdoor environment I wouldn't expect galvanized fasteners to last 12 years in ACQ. But I can be a pessimist.

For a drier, enclosed area like rafters they might but I'm not sure why you'd use pressure treated there.

robertcdf 07-30-2007 04:24 PM

Just go stainless steel and be done with it.

Clutchcargo 07-30-2007 05:21 PM

hmmm, did I make a mistake by buying PT for this project? I was trying to protect the rafter tails from rot so I thought PT would be the best choice. Then I thought what the hell, I might as well use PT for everything.
I don't have much assembled yet, do you think I should I build it with standard lumber?

bigMikeB 07-30-2007 05:42 PM

Stay with the PT lumber just use stainless nails. In my area near the ocean galvanized (hot dipped better than plated) just don't last.

warnerww 07-30-2007 06:01 PM

Quote:

Originally Posted by jogr (Post 55328)
Warnerww - you probably used CCA 12 years ago. This new ACQ is highly corrosive. In an outdoor environment I wouldn't expect galvanized fasteners to last 12 years in ACQ. But I can be a pessimist.

For a drier, enclosed area like rafters they might but I'm not sure why you'd use pressure treated there.

Well that sucks. Just helped a buddy build his deck (used galvies). Will find out how it holds up in about 10 years. So this new and improved stuff will not eat stainless Nails (did I mention I hate stainless nails)?

fhivinylwindows 07-30-2007 06:13 PM

Quote:

Originally Posted by warnerww (Post 55347)
Well that sucks. Just helped a buddy build his deck (used galvies). Will find out how it holds up in about 10 years. So this new and improved stuff will not eat stainless Nails (did I mention I hate stainless nails)?

Take a few extra ones and nail them into some scrape 4x4's and pull one out every 6 months and see what the difference is. I have some pictures of 1/2 lag bolts that are eaten away to the size of a pencil---I will scan and post them when I find them again.


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