More soundproofing yesterday, interspersed with lots of enabling work (mostly moving stuff around so I can get at the walls). I got some space cleared and a chunk of soundproofing rolled out and screwed into place. Then a visit to a friend to break up a piece of furniture. He said it was solid cherry but it turned out a fair chunk of it was plywood (nice grade plywood, but still plywood). It was held together with lots of screws, many of them inaccessible, and lots of glue. The shell of it is now in pieces in his yard, and the salvagable cherry is in the back of my car waiting to be unloaded.
Today I get to play with some more soundproofing. The material comes in 25-foot rolls, and one wall I want soundproofed is about 30 feet long. I can make a join at one window, which is easy enough. Every once in a while I wonder if I ordered enough material but I think I'll be fine. Upstairs is done, bar a few gaps that need filling in, and I think I have enough to finish the downstairs section with maybe a few offcuts left over. Offcuts are handy for when I start the next phase, and may need to fill odd gaps over windows and doors etc.