Garage insulation

Garage slab insulation should be important.
Here is a Fine Home Building piece:
http://www.finehomebuilding.com/2012/12/28/how-to-pour-a-rock-solid-well-insulated-garage-slab
and
http://www.finehomebuilding.com/2017/01/12/extra-insulation
Here are Ben's thoughts on the issue:
We put foam under our basement floor because we planned to use it for living space. We did not foam under our garage floor and it sweats and gets slippery in high humidity. Insulation. I'm impressed with a rock wool product called Rocksol (or something) for floor, wall and roof. 


A combination of extra Roxul ComfortBoard IS and SmartBatt insulation gives the garage a comforting blanket.

http://www.finehomebuilding.com/2014/07/09/insulating-a-slab-on-grade