Cold Closet Bump Out – GreenBuildingAdvisor

I have a 1969 ranch with a bump out for two adjacent bedroom closets. During the midwest winters, this closet is frigid, which causes the bedrooms to run 5 degrees cooler than the rest of the house.

The bump out extends to the exterior grade – there is no gap between the structure and the ground. From what I can tell, the brick veneer extends to concrete block in the ground with no gap at the joint.

When I fished an inspection camera into a hole, I saw building material under the floor, including what looked like concrete block. I’ve added some spray foam insulation through some holes drilled in the flow hoping to plug any gaps between the concrete block and the outside air, but to no real avail.

The basement is finished so I don’t have good access to the underside of this.

Any advice for how to proceed? Dense pack cellulose into the floor? Remove the closet floor entirely and get a better view?