Here's three quick shots of the area next to the HT and music/fitness room. The walls are insulated and there's dead air space between the new walls and the old.
This huge area has a Radon removal system in it, hence the piping and thick plastic membranes on the ground.
We'll be running cables and wiring on the outside of these walls, accessing the area from the equipment closet via the 10' metal conduit installed today.
Shot one shows the walls adjacent to the HT and music/fitness rooms. Subsequent shots pan left. Someday I'd like to finish this space, with it's 10' ceilings. It'd be nice to have a bathroom down here.