We are renovating our house, re-roofing, dry lining and getting windows replaced. The builder recons he will do the dry lining first and then the roof . Does it matter in what order this happens
Well, does your roof leak now? If it leaks and they put in new drywall, and it rains, the new drywall could get leaked on & possibly ruined.
Even if the roof doesn't leak now, they have to tear off the old roof to put a new one on, and they really should wait for good dry weather to do that but sometimes they don't, or unexpected storms appear. So without a roof you almost certainly will have leaks inside the house, again possibly ruining new drywall.
So, with good weather it shouldn't matter. But if it rains & leaks, it will matter. Why not do the roof first?