Not ideal. In stripping off the render I could see daylight through the roof tiles - a sign the bottom tiles have slipped and rain could get in. I was meant to be installing the plaster board today but now a spot of re-roofing is required!
One of the down sides of removing the render - laths exposed at ceiling level will need to be replastered before thermal insulation board is applied. But first I'll remove them and push insulation into the ceiling void