Boring I know, but it had to be done.The polythene around the foundations was full of creases and damaged in places which will have created problems when fixing the polystyrene insulation. The solution was to cut the damaged polythene back and paint the concrete with Mulseal, a black gloop which dries to a rubbery membrane.
Luckily for me Andy and Gregory did this job, leaving me free to finish a lot of other smaller jobs, like putting up roof ladders for the Insulclad installers and tidying up some more of the wiring.
Last thing today I went around every wall taking more than 60 photos. I'm sure they will be invaluable if we ever need to work out where things are in the walls.