I assume the floor will be heated for the entire heating season?
If the frost never gets in then the ground is reasonably warm.
Around here the basement of a house never gets insulation under the floor, and typically the floor does not have radiant heating in it. Not a big deal at all
So, a...
I have done this several times. I have screwed tapcons through the osb to hold it down, and I have screwed sleepers down and then osb on top. I think the better job comes from putting down sleepers.
I too live in a cold winter climate/hot summer. I have a large 2 car insulated but not heated garage attached to my house. I also have a 4 car non insulated/non heated shop beside the house. The insulated house garage is always more comfortable in winter or summer than the non insulated shop...
electricity is 13cents for the charge but over here in St. George where I live [hydro one] it is also a very hefty delivery charge, debt reduction charge tax etc. So in total, more than half of my hydro bill is the other '****' that is literally greater than the actual cost of the hydro. So in...
I am also trying to decide upon heat. My shop is only 24 x 41 with 11' ceilings and my hvac guy [a friend] said go radiant overhead. I mentioned my last shop was radiant overhead and that the recovery was not the best when I had doors opened. He said to way overdo the size of the system as it...