A plasterer plastered our ceilings in July this year and then we had it painted. It looked lovely, but it's started cracking in the upstairs rooms (it's fine downstairs). The plasterer just came round to have a look and says that there must be distemper in the original surface and there's no point in redoing it. The dampness in the new paint would have caused the plaster to detach from the ceiling. He has suggested putting boards up and plastering the boards. For rooms with coving, he's going to cut the ceiling out and put boarding in, so the coving can stay in place. I don't understand why he can't clean the ceiling down and replaster. Any advice much appreciated.