Step #2: installing vapor barrier and insulation

A.

Cover the entire slab area with vapor barrier, e.g., 6-mil visqueen

B.

Install the closed-cell insulation, e.g., 3-inch R-15, over the entire area; first, along the edges [vertical] of the stem-wall and second, over the interior of the slab area.

C.

Tape the seams of the closed-cell insulation.