With the frost wall back filled and the center of the foundation filled it, it was time to get ready to pour concrete. The first thing that went down was a vapor barrier, consisting of 20 mil poly plastic.
A layer of 4 inch steel mesh wire was laid on top of the insulation, held up with medium sized rocks. Attached to the mesh was 1/2 inch pex for in slab radiant heating. Finally, the outside of the block wall was formed and 1 inch of foam insulation was run around the outside.
Finally, it was time to pour concrete. In an almost surreal moment, the temperature moderated and on Friday, January 13th we were able to pour the slab in 56 degree weather. Overnight, the temperature went down to 34 degrees then back up to 56 the next day. If this is climate change, I am not complaining.
The total slab was about 8 cubic yards, 240 inches x 192 inches x 8 inches = 368, 640 cubic inches or 7.9 cubic yards, which cost $709.00 delivered, mixed and poured by the ready mix truck. Thankfully, the previous night had been cold and the ground was frozen solid. The entire pour took about 45 minutes. Since the weather was warm and forecast to stay above freezing, I did not get accelerant added to the mix. By 4 pm, it was hard enough to smooth finish.
I kept a tarp over it for three days.
The total cost for the insulation, reenforcing wire, pex, concrete and labor was $2415.39
The running total $5,156.62