Originally Posted by CJO
Well, finally finished all of the electric (both high-volt and low-volt). Pictures are probably only relevant and interesting to me and no one else, but I'll get some up tonight anyway
Unfortunately, or perhaps fortunately, I realized that I don't have the hat track spaced correctly. I have them spaced roughly 24" apart, but I started the first one 3" from the wall. In doing so, I placed them so that the drywall seams have no way of lining up with the hat track. Not being able to secure the drywall edges to the hat track is a good way to get cracks in your ceiling! I also haven't quite figured out in my mind how I can space them so that I can secure both the first and second layers since the second layer will be 5/8" offset from the first layer due to the layer of drywall on the wall.
we all look forward the pictures, especially those who are doing their own work. You never know what unknown ideas, problems or solutions you may present to your readers. I for one, appreciate you taking the time and effort to post all of your ideas, trials, and tribulations. It has been beneficial to me.
As for the hat channel offset, The metal piece is not wide enough to actually fasten both layers of drywall to it unless you toe in the screws. Make sure you use the acoustical sealant along those seams.
Cracks come from the combination of a rigid area connected to a moving area. In theory, the combination of the hat channel, acoustical sealant, and green glue should make the entire system flexible enough to prevent cracks along those seams. Then, when you tape up the 2nd layer's seams, everything should be alright...
I am about to purchase my hat channel and clips, and I'll also be posting pictures and an explaination of how I did it...