drywall fasteners for pressure-treated lumber?

[bsjams]

Have had a number of situations calling for drywall to be fastened to pressure-treated lumber. Now, with the new more corrosive pt lumber, I'm more concerned about fasteners corroding in it.

The other day I used 1 1/4 galvanized exterior screws, but a few minutes ago I read a comment indicating that they have a little "nib" (as the commenter called it) on the back of the head that will tear the drywall paper. I didn't notice that; I'll have to go out to the van and look at my screws and see whether they have the "nib".

Any suggestions for fasteners (screws and/or nails) that won't corrode in pt lumber?

[Mike from NH]

Re: drywall fasteners for pressure-treated lumber?

I would use Deckmate's, as they are coated screw and acceptable for underwater use I believe. In otherwords more than suitable for drywall into pt.

[Happy Home]

Re: drywall fasteners for pressure-treated lumber?

What are the situations ? There was a thread awhile back about greater use of pt in a house / addition.

Clearly there is significantly more potential for warping, twisting and just spitting out the fasteners regardless of the type.

Also covered was use of dw fasteners on pt furring strips. Hopefully the pt is mostly dry or closed up last. Use construction adhesive and a few screws. Then come back and remove the screws. No corrosion. You can also screw through 1x surface strips if think it will work better. Then remove later.

[Greg From K/W]

Re: drywall fasteners for pressure-treated lumber?

Not to mention the failure of drywall screws in the PT. They are not ACQ approved as far as I know. Are there ACQ drywall screws available at all? Up her ei the great white north I haven't seen any.

[bsjams]

Re: drywall fasteners for pressure-treated lumber?

Happy Home - the situation is areas below BFE (base flood elevation). I'm in coastal Georgia. Many homes are in areas designated as flood zones and any framing lumber below the BFE has to be pressure-treated. According to code, no drywall is allowed in such areas (like garages below the BFE), but it's commonly installed in such areas.

[Mike from NH]

Re: drywall fasteners for pressure-treated lumber?

Ok so the lumber is PT and the screws are exterior type, so what types are insulation and drywall?

[Bob Kovacs]

Re: drywall fasteners for pressure-treated lumber?

The corrosion problems with ACQ are caused by galvanic reactions between dissimilar metals, which occur when moisture is present. The typical exterior applications for using PT lumber usually have moisture present due to rain, etc., which creates the reaction you're concerned about. In a situation like yours, the amount of moisture present should be much lower, and the corrosion problem lessened. If there's enough moisture there to cause corrosion, you've got bigger issues to be concerned with, like mold eating the drywall.

[SteveC]

Re: drywall fasteners for pressure-treated lumber?

If you also glue on the rock, what's the worst than can happen.

[A W Smith]

Re: drywall fasteners for pressure-treated lumber?

cant you use ceramic coated deck screws?
http://www.google.com/#hl=en&q=ceram...fp=Q5rYJf3FIq4