Here's what I have; 50 year old construction. 2x4 trusses, spaced 22" centers (2nd floor). Running 28ft in length with a beam in the middle (14ft). For my ceiling I have nailed up 1" blueboard (Hard Styrofoam) directly to the 2x4 trusses.
Getting ready to hang my drywall. I have screwed in 1x4 furring strips every 16". My plan is to screw the 5/8 drywall into the furring strips.
Question being: will my ceiling handle the weight?
Hello again, Sorry for being so confusing. I would send a pic If I was able. I do not have pic of the trusses or anything like that at the moment. Yes, I do have cellulose (13") in my attic (rafters). Picture if you will; A ceiling that runs 28' wide and 38' long, with a 6" beam running perpendicular down the middle of the trusses (bottom of trusses). The trusses are made using 2 -14' 2x4's spanning the entire 28' distance, there is a beam smack dab in the middle where the trusses are fabbed together with 1/2" plywood gusset. there was drywall nailed directly to the bottom 2x4 of the trusses at one time, I just don't know if it was 1/2" or 5/8". So what we now have is 1" rigid foam nailed to the bottom 2x4 (bottom of trusses) and 1x4 furring strips screwed through the rigid foam and into the bottom trusses. Now comes the hanging of the drywall. I am not so concerned with the 2x4 trusses holding the drywall as much as I am the 1x4's being able to hold without sagging. Is screwing into (say) 5/8 inch wood going to be enough depth to hold up drywall, Being that I have 5/8 inch going through the drywall as well. It is old construction (50 yrs). So we're not talking normal. there isn't anything normal about this house.