We laid 3 inches on rigid foam insulation in the floor. There is a little lip on the edge of the frame, so we had to cut some pieces to fit under the lip. We filled in the gaps with spray foam. There is sill seal on the exposed frame. This will help prevent cold spots in the floor in the middle of winter.
We attached pressure treated 2×4’s to the outside of the frame. The subfloor is extended over these 2×4’s. This gives me just a little bit more interior space and will enable us to center the framing over the existing bolts.
Next week, we’ll finish installing the subfloor and start on the framing!