Please help with advice about screw size and length.
My ceiling has whisper clips recessed in the joist cavities, and will have 3/4" osb, gg, 5/8" drywall up in a few days. I have size 6 x 1 1/4" self drilling drywall screws for the osb layer, and 6 x 1 5/8" self drilling drywall screws for the drywall layer. Since these were the only length self drilling drywall screws I was able to find, I hope they're OK.
I have two walls with 1/2" osb furring strips, which will have 3/4" osb, gg, 5/8" drywall applied. What size/length screws would be best for these walls? And just standard wood screws? I'm an accountant and know next to nothing about construction.
Also, I've read here that with drywall over osb it isn't necessary to have seams centered on the hat channel for the second layer. Even though it might not be necessary, is it still best to try and do it that way?