Today's thermal image of the outside wall was pleasing - the color is much more uniform, suggesting my patchwork on the inside is making a difference. Today's job is to go over the large gap I filled yesterday and put another layer of mortar in, bringing it more or less level with the rest of the wall. The front wall has some gaps in it, only noticeable when the wind blows. From the inside I'm struggling to see them, and they aren't showing up on my thermal image, so I'll have to study the outside and most likely touch up some mortar joints.
There's also another patch that is showing up much brighter on thermal images, which most likely means I've got more gaps to fill. Then I can move to a wall upstairs that currently features a lot of building foam and fiberglass, and fill some much larger gaps on the inner face of the wall. Thankfully I found a web site that shows how to repair concrete blocks - although this wall was built the way it is (no idea why, I guess that's how they did it back then) the principles should still work and I just need a supply of concrete block faces. My next door neighbor has a bunch of them in his yard that I think he plans to dump, and if so we can save each other some money because I can take them away for him. I save the cost of buying blocks and he saves the cost of dumping a pile of broken blocks he doesn't need. All I plan to do with them is cut them up and salvage parts of them, so the fact they are broken doesn't matter.
