In message , Mungo
Henning writes
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?

Well I've just replaced my old corrugated roof on the extension which
lasted about 5 years. The twinwall I bought is guaranteed for 10 years


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

Slightly different principle here. You have an inverted "T" from
aluminium which butts up to the two pieces you are joining. There is
then a mushroom shaped top which slots into the "T" with barbs. You can
buy the stuff in 6 metre lengths, so there is no need to overlap down
the length. I bought mine from PolyPlastics in Enfield (which is where
Screwfix buy it from (I think)), but there must be other distributors
oop norf. I'll take some photos over the weekend for you.


Ta again

Mungo

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geoff