So. Yes, new workshop walls. Looks as there'll be 25mm Jblite EPS 70, thn rockwool 50mm, then Visqueen, then plasterboard. Ceiling, maybe
150mm Isover glassfibre loft insulation, Visqueen, plasterboard.I was wondering about surface mounting cable, or maybe running it in runking, but what about running it behind the plasterboard? It would look a bit nicer, but would hat be OK?
Lighting to LED probably individual lamps, maybe in batten lampholders.
Power to sockets using 2.5mmT&E.