Insulating a metal shop?

MrBelvedere2 said
I Have a 60x40 shop and my quote to spray foam was over $20k. no way that was gonna happen.
I have started doing rockwool batts, I like that I can do it in sections, and on my time, and not have to clean the whole shop out. It's frame with 2x8 lumber so I can use R30 rated batts, and then just put plywood/OSB panels over it and be done. Rockwool is great for a shop enviroment , doesn't absorb moisture and is fire retardant. In my research before starting it seemed to be the best option.

I did the same as above. 30x40 shop, done with R30 batt in all walls and ceiling. Ceiling was covered in white tyvek-like material so it's real reflective for lighting. The walls were done 8' up in 1/2" plywood. Now that I have the mini split installed it's warm in the winter and cool in the summer. It's pretty posh for a guy that used to work in the driveway in the weather.