Insulating a metal shop?

i have a 30X50 pole barn cut the 1.5 foam board to fit between the cross beams then framed between the poles in 2x3 used fiberglass to fill in then sheet rocked over that
but its the home shop so just do a secton or two at a time didn't hurt the pocket that way have about 75% done
her need the cooling and heating to play year round