Thanks Sisi. We did know when we bought this house 2 years ago that it was a bottom of the pack 30 year old project house! But we thought that would mean likely having to replace appliances, no ceilings
It didn't have any insulation, which we just had put in a few months ago, either. But that isn't very heavy, so the ceiling should be able to take it.
The assessment is tomorrow, and they'll determine if the damage was weather related (and thus covered).
The room is very cold, since there's no point in heating it, and not very light, so we are using our front lounge room at night more.