Insulating a metal shop?

OK couple of the short wall with upper section shown better, and two from yesterday when I finished up one row of ceiling insulation.

Once I got going on this, it was fairly simple. What also helped is dropping from a full 1" spacer down to a 3/4-ish spacer made fittings behind the steel members in some locations MUCH easier.....so gonna finish the rest of the sheeting installs with 3/4" dimension.
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My buddy helped me expand my electrical service box connections from where the prior idiot, I mean owner bodgered it all up. Now it's all to code.....or danged close to it!
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This wall is representative of the stuff that I have against the entire 50' length! All needs to be moved to get in to do the insulation along the bottom. Not too bad for doing the ceiling...only need to clean off the top..... "Corrected" electrical will be rerun under 7' high wall girt. Easy peasy once the shelves are moved out about 3-4'! This is all to be replaced by old Orchard Supply gondola shelving, and custom work benches. A larger 65" Craigslist special TV will get rafterized at some point......suspended.... AND if I can get my collective shite together, a lot of the spare parts will get stashed in a shiny almost new 20' container with more gondola shelving in it. Get it out of this shop...... But gotta find a dealer with what I need. Or think I need..... Note odd cuts in one sheet of insulation....damaged piece.....put to good use!
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Fasteners for ceiling material. 3/4" or 1" self tapping screws do the holding. Wall material washers are regular thin tin or stainless or such. Easy does it with the screw guns!!!!
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Last piece I put up yesterday. This was a 18' piece that overlapped the 3' opening between the top two purlins and is where a peak vent lives. See next pic.
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There is a 15' piece on the last three purlins and wall girt. The 18' piece crosses over the 3' gap and is attached overlaping the 15' material by 3". I chose to leave this area accessible by simply removing the row of fasteners so that the 3' piece could "flap" down for any access to peak needed. Good idea? Can only hope so, AND that I never need to do that!!! Next guy......! :)
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You can also see where I am folding the end down.....wall insulation will come up and cover this. It will be trimmed back a tad to fit over tin spacers where needed..... Any gap at top of wall insulation to ceiling will be foamed..... I do need to backtrack and do this treatment to the first 24' that I installed! Rev B!!! ENGINEER AS YOU GO! Ugh.

Cheers!
Steve