Sheathing is exposed, making it a good time for adding wiring for baseboard electric heating. It wasn’t added before the drywall was put in because the drywall already existed. The heat pump system needs a backup, and it happens that the house had many leftover electric baseboard heaters after switching to a gas furnace.
The first sheathing (a.k.a. sheeting) hole was cut, allowing wiring to be connected into the panel.
Further holes were cut into the sheathing along the east side of the building.
More work to come.