Question on OSB for workshop walls

[Falcon67]

Off topic slightly but I always wonder why people do metal buildings and then end up framing out the inside with 2x4's and plywood. Wouldn't it be easier just to stick build in the first place?

Location dependent I'd think, but here in Texas you can buy a hella big steel building pretty cheap. Big enough to make it still less expensive to frame in an "office" area inside. Depending on exterior materials and roofing, just sticking up the inside could still come out cheaper. Example - A Mueller 24x30x11 115 MPH wind rating "garage kit" with one 16x8 framed opening is listed at $5795. 30x40x12, 10x10 door opening $7395. 40x50 less than $12K.

 

[lakeroadster]

There seems to be some debate as to spray foam and potential rust issues.

Member "Redhead "has 1st hand experience with this. You don't want to void the warranty on the steel so follow their specifications. Perhaps a vapor barrier / home wrap would allow you to have your foam... and maintain your steel warranty too?

I have been called on two buildings so far with rust issues. One each open and closed cell. Both about eight years ago. Both buildings need to be stripped of all insulation and sheeting. One building needs some girts replaced.
None of the spray foam guys around here will spray directly on sheet metal any more. We note in our contracts that spray foam applied to the metal will void any future warranty.
This is a developing problem and one that is going to be very expensive.

 

[jetnow1]

Not debating the merits of osb vs drywall but I put 54 sheets of 5/8 drywall (firerock) in
my garage worked out to about 10/sheet with bulk pricing and a 10% coupon from Lowes.
They damaged a few sheets with their forklift, offered to swap them out but I knew they would just end up selling them cheap so said I would take them as is if they threw in a couple of buckets of compound. Had to trim some edges anyway. Could have bought some longer sheets and saved a little taping on the ceiling but at 63 was not lifting 12 foot 5/8 by myself anymore. My drywall lift paid for itself a long time ago, and I do not
really mind taping.