Roger, Yep ---- Inside of boothand bath is being done in 5/8 moisterproof drywall, everything else is covered in ag panel(steel ).
The stuff yer lookin @ is ok, but I found a local contractor to come in and spray 2 - 2 1/2 " for around $1.10 a sq ft.
He was in and out in 3 hrs and I started hangin metal right away.
Can tell the differance in the sound and cooling already and I ain't done yet.
Once the A/C and heat is in it ought to B a real pleasure workin in it