Not exactly walls per se…..
But getting there. These are the sprouts from the wall seeds that the joiny person planted. Apparently, once they’re fully grown they can go about sticking bits of plasterboard to them. Todays job seems to be something called dotting and dabbing, which involves them plopping galloping great gobbits of gloopy goo all over the stone walls. Once they’ve done that, they fix a framework of timber to the walls and then fix plasterboard to that, the goop acting as a bond and an insulation. Fascinating. Can I move back in now please?