Hi Geoff,
Ta for the reply.

geoff wrote in message
If I were you, I'd go for twinwall or something like that. Corrugated
sheets have a life of about 5 years and start to go brown and brittle.

What's the life of twinwall in comparison then?

How easy is it to lap-joint these panels (the corrugated panels will
nicely self-register due to the wave profile)?

Ta again

Mungo