Day 3: Removed Shower Frame and tiles.
Day cut short due to tile delivery to house.
I am familiar with cement board. The material behind the tiles looks like a sheet of 1/2 cement board which is on the thick side for cement board, and I noticed between it and the drywall is a wire mesh, which makes me wonder if this is a pre-made board or they just slathered 1/2" of cement/mud on the wall over the mesh. thoughts? On the lower right there was a weak spot when I removed the tiles and the cement came off with the drywall underneath, revealing the copper pipes, wrapped in those rubber insulation tubes made for water pipes.
All of this is coming out. I briefly considered one of those small hand saws with the rotating blade, not the standard size circular hand saw, to cut out the cement and decided that would create way too much dust so I'm going to attack it with the crow bar tomorrow.
In the outside wall where the pipes are is standard fiberglass batt insulation. I'll remove that and put in a thick foam board and spray the edges of it with the spray foam to seal it for air leaks. I think that will be much better than the batt insulation currently there. I'll verify the foam has a higher R rating than the fiberglass insulation.