Installing 5000 sq ft. Of foam board for radiant floor heat

We are putting down roughly 200 sheets of 2” foam board for the insulation of our radiant floor heat. Keep an eye out for upcoming videos showing us installing the heating tubes and pouring the floor!
#concrete
#construction
#floorheat

[@mattben]

I have heard both ways on the vapor barrier. Hoping to start a pole barn this summer and I am still undecided but leaning towards putting it under.

[@truthhunter1177]

a vapor barrier is a blocker of vapor or moisture from the ground, it goes under the foam or your moisture or water will soak the foam board making it less a value to the warmth of the concrete slab, to prove it a vapor barrier is under the slab with no foam board TRUE, I want to foam to be drier to make it work best for my home ok good luck sir