I have structural slab that was poured about a week ago in mild weather, so it experienced a few days of warm (above freezing) temperatures. It is a 20x40 foot slab that has 2" insulation underneath as well as the perimeter grade beam also has 2" around it. The slab is on 3/4 clear stone compacted that is minimal 6" on the grade beam and probable 2 feet plus on the center slab area. The grade beam is 2ftx2ft with lots of steel and steel 6" mesh tying it to the slab portion. The slab portion is minimum 6" and all in one pour. Framing is due in the next week or so and we're just up and around the freezing mark day2+C and night -2C as an example. I under the impression that I'm to get the horizontal 2" insulation installed as soon as possible and then backfill. Some are saying you should backfill with 3/4 clear, then cloth followed by soil? Others have said get some heat into the house once framed and wait until spring to finish the outside grade? Just looking to see what makes sense for now. Also, the contractor has used 2" styrofoam board both under the slab and on the outside walls. I had wanted silverboard on the outside and intend on using silverboard on the the horizontal board that is to be buried.
Any advise would be appreciated.
Thanks!