Re the ICF finish...

I used to spec a heavy duty plastic "drain" full height which protects the membrane and the insulation during backfill. The finish can then be applied above grade mechanically (never glue) with aluminum fasteners. Some of these come in different colours and are quite decorative and are meant to be used without a finish when they are applied full height. But, if the backfilling is tomorrow, too late.

Backfilling is tomorrow? Is the floor already on or is bracing in place?