Around here (ct) we need 3" of rigid insulation under a slab if we are doing radiant heat as a primary heat source. I think that is about r12-r15 depending on type, I would not want to spend all that money on the system only for it not to perform as anticipated.
If a low price is what you are after I would think a pole barn is the way to go
That is provided you have a pretty flat lot to work with
A pole barn would not require much in the way of excavation or concrete
You need to take a trip into your local building dept and learn the specific...
I am a newbie to this forum
So far it has been a great place to get ideas for my future garage
I am considering using Steel Open Web Floor trusses in my design to increase the span. Has any one used these in there design, I am looking for some span tables that would give me a clue of what I can...
I have been following your progress and things look great
I am over in Redding and considering a pole barn myself
Is that really only 20' wide, it looks alot wider in the photos