Hi there. I'm moving into a strange terrace house later this month. It has empty cavity walls, and a large loft space with 3 rooms separated by stud walls, and the roof is uninsulated (both according to the EPC. I would like to insulate the roof before the winter, and ideally before we start to use that area for living, however as I understand it, it's not as simple as just ripping off the plasterboard, putting insulation in and putting it back up.
Is this something I can reasonably do myself? I have good woodworking skills, am fine with building stud walls etc, but have never done anything with a roof before. Some articles I've found are suggesting I'd need to insulate on the roof side of the roof joists, which seems like it would incur a lot of cost, scaffolding etc and move it out of my area to tackle. Others suggest I can insulate on the room side, but then I'd need to be certain the ventilation was adequate or I could end up with condensation on the cold joists. I'd also be worried about thermal bridging on the internal walls.
What's a general MO for tackling something like this? Hire a builder (almost impossible right now) and hope they're competent?
Many thanks!