Replies

1. 
   clinkard | Dec 16, 2009 05:26pm | #1

   What about two layers of 3/8?

   or Three 1/4?

2. 
   cussnu2 | Dec 16, 2009 06:28pm | #2

   https://www.finehomebuilding.com/PDF/Free/021164076.pdf

   Go to the very bottom of this article and it shows you how you can do invisible butt joints by joining them INBETWEEN the joists or in your case in between the strapping. Seems like all you would have to do is pull out the strapping at 12 foot leaving you with a space of sligthly less than 24" in which you can use the above technique.

   If you are nervous about the 24" then you could always use something wider to strap with on the 11 foot and 13 foot straps like a 1x 6 cheated to the 12 foot side.

3. 
   jagtech | Dec 16, 2009 08:30pm | #3

   I vote with clinkard... three 1/4" sheets would be easy to handle, and likely will give a better looking finished job.

1. 
   LIVEONSAWDUST | Dec 16, 2009 10:01pm | #4

   I dont think the origonal poster was talking about a curved cieling, he just wants to bend it upward slightly at the butt joint.

4. 
   BobChapman | Dec 16, 2009 10:35pm | #5

   I h ave done exactly as you wish to do with 5/8" drywall. Mine was a flat ceiling, and the butt joint was going to land on a strap. So I recessed the strap about 1/8 or 3/16 below the surface of the other straps, and hung the drywall. Worked perfectly: no cacking or tearing of the drywall. You may wish to go easy with the first couple or three screws: run all three in until they touch the drywall surface, then tighten them evenly by hand, first one and then the next, .., repeating until they are all down tight. This avoids putting all the pressure on one screwhead.

   Bob Chapman

1. 
   wane | Dec 17, 2009 08:42am | #6

   thanks all, your correct it's
   thanks all, your correct it's not a curved cieling just the but joints. I've just never tried this with 5/8 and as you know it's really stiff!

5. 
   clinkard | Dec 19, 2009 01:18pm | #7

   I mis-read the o.p. My mistake.

   I I think it would be possible to slightly bend it backwards, to create a recess, by raising..not lowering the strapping! lol.

6. 
   RobertLee | Dec 19, 2009 02:25pm | #8

   I would stager the but joints and not have a long but joint.

   A good taper should be able to flair the joint out enough to hide the butt joint.

7. 
   NickNukeEm | Dec 20, 2009 10:59am | #9

   Run the rock ends to the middle of the rafter span, and use these a ButtHanger: http://www.rocksplicer.com/butthanger/butthanger.html

   They essentially create a tapered edge butt joint.