This is a continuation from the post below. I guess I only get to put up 5 pictures at a time.
Anyways, pictures of the rebar and insulation board. The green lines are the rooms marked out so they can lay the heating tubes.
The red tubes are made to hold high pressure. The boiler heats water that is then pumped through the tubes that will then heat the concrete that is poured over. Once heated, this will allow steady heat without the need for air blowers and fans, keeping a steady temperature. The tubes are attached to the rebar to keep them from floating up, and the concrete will be poured over to the height of the insulation board along the sides, about 5 inches.