Anyway, the carpenter assures us that the ceiling was actually going to fall again and that it is in fact necessary to reinforce it asap. He's going to put some trunks across it (on the inside of the house). I guess at home this would be a quick process: drill holes, cut wood, install. Because houses are concrete here and no one owns serious power tools, it becomes slightly more complicated in Peru. The hole in the left of the photo goes through to outside.
He did mention a second ago that it might be better just to throw out the whole ceiling/roof and put in a new one. Tim is pretending he didn't hear it I think.