Insulating a metal shop?

OK, more pic's!

First half of 30ft end wall. 4ft pieces require a little trim at the left side. One of my damaged pieces served to provide upper angled bits nicely! White "ceiling tape" strips are used to hold freshly glued pieces in place. The strips can be reused about three times before the adhesive starts to get dirty.... I did pre-clean all of my walls and girt recesses with a brush and vacuum cleaner. Spiderwebs, dust, and bird nest contributions. ( I did seal up the outer birdie ingress with foam inserts just for that.....but 40years had some buildup! I didn't want this crap to be falling down in the air space between tin and insulation sheeting!
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The stuff!
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Hmm, thought I had a better pic...... First section with upper and lower pieces started.
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I needed more security to get to walls.....with shelving in the way.....car rams worked great! Wood for th rest in a couple of variations. Step on two boards at all times.....one board doesn't instill confidence!!! It's old wood.....!
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Another challenge area over the roll up door! Can't have insulation rubbing on this all the time..... Conduit is just on far side of the door, not over top of it. I did rebend some of this....only half inch so not too bad....
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More HD tin 2x4's to the rescue! I screwed/glued 10-11ft of these to the horizontal girt at the door top and then attached shorter pieces from the first purlin back to the wall. Gave me about a 2" clearance when door is fully rolled up!
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Notched one end to fit over purlin profile. Bottom tab left for screws into purlin.
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Slipped/snapped them in place and screwed in from bottom "tab"
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Attached at purlin/girt behind door! I chalk marked 5' intervals on the purlins to help align material when placing it! ....one man band....so needed all the guidance I can get!
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Anything I could find to hold material up! Bungee cords.....adjustable poles with cross pieces....
Chain was pulled down after I realized I no longer needed it to get engines etc out/in the truck.....because I now have a lift with very long arms that will support hundreds of lbs! Duh! That came to me while I was sleeping......cuz I was gonna cut a hole in the insulation and drop the hook down thru...."just in case" I needed it......
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That's all for now!
Cheers!
Steve