Regarding a new 1 1/2 story home in a hot humid climate (2B), 2-stud corners at outside walls, spray polyurethane foam insulation, non-vented attic:
I need to use drywall clips for the corners and some other places.
1) There appears to be 2 basic clip types. One screws to the framing, and the drywall just slips into a U shaped clip. The other requires a screw in both framing and drywall. The first seems like it would be simpler to use. Any advice on the best type to use.
2) Any particular manufacturers that stand out for quality/ease of use/or whatever?
3) My dry-waller has never used clips. It seems like a simple concept. Should I be concerned about being his first try at this? I assume following the manufacturer’s directions should be good enough. Any specific advice for a first time user?
4) The second floor is supported by either open web trusses, or 2X’s, and one large glulam beam. Since this is a non-vented (semi-conditioned) attic, is it accurate to assume that truss uplift is not an issue? And further, that special details for using drywall clips in these areas instead of just screwing the first-floor-ceiling drywall to the truss or beam are not applicable?
5) Should I use clips in all corners or just the exterior wall corners? Or maybe just where I’m missing the necessary dead wood to do otherwise? Some of the literature recommends extensive use of the clips to avoid drywall cracking. Do you concur?
6) HD Galvanized, plastic, zinc plated, plain steel?—-Does it matter?
7) If you are using sealant on exterior-wall drywall edges as a means to an air barrier, then doesn’t that negate the benefits of using clips as a means of preventing cracking of drywall in corners? i.e. if you tie it down with sealant, how is that any different than screwing it to the wall (as related to drywall corner cracking)? This doesn’t apply to me (spf is my seal), but I’m interested in this for furthering my education.
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