Little more progress was made today. Got the ceiling tiles all down.
Since I’m going to be putting up sheetrock I don’t need all these strips either.
Looks like I need to do another dump run.
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Usually you do have batten like that for your drywall to screw into, otherwise there will be nothing around the edges to fix to and it will flap about at the edges.
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I’ll have to look into it some more. I certainly didn’t need them every 12".
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16 inches apart on center is what it is done to, as a sheet is 4ft by 8 ft you should have 2 lines down the middle of the length and 1 line on each edge of the drywall. Screwed every 14 inches roughly. Dont use a an impact gun to put the crews in it vibrates and cracks the gypsum up inside, just a normal screw gun.
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Plasterboard/drywall boards usually have 600 centres to comply with building regs here in the UK. 12 inches is a bit over kill 
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Not when you’re hanging 12" tiles…
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Ah so the tiles were fixed directly to the timbers without any kind of boarding behind them??
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Correct. The tiles are a soundboard type of material. Think cardboard. They were nailed directly to the furring strips. The furring strips were nailed to the joists, they wouldn’t have held up a sheet of sheetrock. Everything I looked at online, they screwed the sheetrock to the joists.
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Sheetrock = plasterboard??? Sorry not really clued up with the product names in the USA bro.
You’d be surprised at the weight a plasterboard screwed to the spars can hold if you reduce the spacing of each screw down to around 100mm apart. I’ve seen a full ceiling with ceramic tiles fixed with tile adhesive before. God knows how they managed to keep them held up until the adhesive fully dried and cured 
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Yeah, apparently it’s a name brand of wallboard. Paper backed gypsum. Same stuffs. They would likely hold if screwed, but nails wouldn’t have cut it.
Still doing research on the subject. Seems about a 50/50 split on the opinion.
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I did sheetrock for a few years when I was younger. You go straight into the joists and put the boards up perpendicular to the joists. 5 screws per joist and stagger the boards 2 joists for code (in Florida at least). If there’s a double butt joint in the room (2 joists side by side, didnt see one in your pics) start from that out. If not, pick a wall to start at. Put up your first board whole, then cut the one next to it so that it ends in the middle of the joist 2 back from the one the first landed on.
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12ml external grade tongue and groove plywood screwed to the joists then painted with high humidity paint would be an option. It would give the added benefit of you could screw directly into the ply without needing any plasplugs/wall plugs to hang lights and filters basically anywhere on the ceiling. Counter sink any screw holes and fill with filler before painting. The only problem would be where the boards meet you’d see the joint line.
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If hes worried about the joint he could putty the crack and sand it. Same as you would do after taping off the sheetrock
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Don’t forget this will be sectioned off in three parts as well…
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Are you doing full walls? If so, put those up first. For smaller sections the staggering isnt necessary. I forget the dimensions of the rooms, but depending on the orientation of the joists in the bigger section, you may not need to stagger at all. If the joists run perpendicular to the separation wall you’ll need to stagger, if parallel you can just run boards straight across if you need somewhere to screw to, just slap a piece of 2x4 onto the top of the wall or to the side of another joist
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Yes, exactly. The rooms will be (roughly) 4x6, 4x4, and 7x10 feet. So both grow rooms can be covered by a single sheet, no seams. I most definitely want to do it right the first time. I’m even debating insulation for sound deadening, the master bedroom is above this room.
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Stick some R20 fibreglass insulation up there, that will keep the rooms stable temp wise unless you need more heat in the winter in your bedroom. It could make your bedroom hotter in the summer as well if not insulated.
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I could use less heat up there in the winter honestly. 
thermostat is by the front door and upstairs gets super hot. I have it set at 62°F right now.
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I don’t know if its the same in the us but a standard plasterboard or ply sheet is 2400 x 1200.
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Are you deliberately trying to confuse him, you know they only know feet and inches in America. 
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