My house was rewired 20 years ago. The insulation in the ceilings and walls is fireproof foam. Nobody at the time knew that the foam would degrade the wiring, as it is doing.
I'll pull off the corrugated roofing iron and wooden weatherboards where necessary to fix it. There isn't much wiring involved. There's a timber frame.
I was wondering if I can just put building paper under the wires where they lie on the foam in the ceilings. And maybe more building paper in the walls. There is already building paper immediately next to the roof and weatherboards.