Tom wrote:
Phil Anthropist wrote:
"Tom" wrote:
I have been told it might be 'plastisol' but no one seems to know for
sure at the moment. Hopefully it's either galvanised or coated steel,
it just looks suspiciously like asbestos to me from the inside,
although the corrugated asbestos sheets I have seen elsewhere had wider
corrugations.

Look at the fixing of the sheeting to the purlins/rails - J-bolts or
self/tapping screws