I’m currently framing skylight wells on which to hang 5/8″ blueboard (for plaster).
1st question:
Intuition tells me I should avoid attaching blueboard to the roof rafters because movement from walking on the roof (to clean it and the skylight windows) and changes in heat and humidity will cause lots of movement of the rafters and cause cracks in my plaster job. Am I right?
2nd question:
I’ve heard about drywall clips but I don’t have information on their use.
Can I use drywall clips to hang a 18″ x 24″ horizontal piece from the three vertical pieces of blueboard? (visualize a three-sided box, I want to know if the clips are sufficient to hang the top of the box?) I plan to lap the top over the edges of the sides.
If the clips won’t hold the top piece, any ideas on how to create support without affixing something to the rafters?
Thanks in advance for your help!
Replies
UPDATE:
I found Prest-On drywall corner-back fasteners on the web http://www.prest-on.com/?idAff=3
There's some information about how to use these.
These fasteners look very desirable for my application. Yet, my local gypsum dealer has a single box of these which he says hasn't sold in 4 years.
Is there some reason I should be wary of using these?
Is there some reason I should be wary of using these?
They are sheer nonsense! Use wood to frame it properly and forgo the clips.
The clips (Simpson makes some too I believe) are not made to really hang the drywall but more to act as a backer in place of deadwood (blocking) at corners. I've used them on quite a few jobs where they were more appropriate than blocking due to fit, inconspicuous place, time and they've worked quite well.
Just not an all-encompassing item and if I had any doubts about the specific application, or had any doubt, I'd use wood blocking.
Mike
Commercial framers use something like a sound channel they call it rc channel. It's a piece of light gauge steel and it attaches to the studs with one screw through a flange and it holds the rock about 3/8" off the framing. Might work.
http://www.dietrichindustries.com/library/pdf/catalog/Interior_Framing.pdf
hers what it looks like or browse thropugh the catalog.