Steel shop question

When my friend built his large (5 car) garage he had it insulated with spray foam (between the beams) by the builders. We live in a very hot climate (95 to 100 degrees most of the year) and the 5" thick foam amazingly keeps most of the heat out of the shop. In the winter when it's 40 degrees outside the shop stays nice and comfortable (ground heat through the slab). I've worked in there many, many months and I would highly recommend the spray foam that was used in my friend's building!! He did have to install 2 X 4 studs to get some wall space for his tools and man cave stuff. You can see his shop in the background (second pic) and in the first pic you can see the spray foam between the girders.
I personally didn't think the spray foam would make that much difference but believe me IT DOES!!!

Treblig