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Ive done insulation for over a yr and I get where your coming from. People in Alberta prefer Roxul in the walls. Fiberglass is just easy to cut and the perforations make it much easier. I prefer fiberglass.
As for screws.... I use em before nails any day. Some old timers use nails to tack the sheet up then a screw guy goes after to finish the job. I prefer screws 100% and think they are stronger than a nail. Nails (could) work their way out, a screw dosnt magical un-screw. Plus, hammering them can damage the paper causing the nail to pop. A house requires thousands of screws. Hammering a thousand nails with a hammer and not having several pop due to damaged paper would require 100% accuracy with your hammer. Its just not going to happen. Tho, using glue mud on first coat on the screws does help. I normally do that on the taping process anyways. Best way to hang board imo is the glue drywall on int walls n screw. One in the bevel 2 in the field staggered in the field and 3 on the edges. Same deal for ex walls only 3 in the field and same with ceiling board.
Every time I've seen Mikes show I do notice he uses local drywall contractors. They're always different and I always notice them doing at least one thing in a way I dont prefer. I just think for the average guy that doesnt know jack on construction, the show does help to understand the concept quite well and they do build nice showers.
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