I was going to start spray foam, but the partly-used tanks had been sitting for over a year, and the sprayer gun had clogged/frozen up. So, I'll try later with the unopened tanks and then switch the hoses/gun.
Finished covering everything to be ready to spray foam. I put down a temporary loft floor, and shrouded the underside to keep foam off the exposed joists.
We did some more masking last night, in preparation for the spray foam. We didn't take any pictures so here are some from the other day when we were doing the same thing.