In message
,
Kipper at sea writes

Dave R
ROOF PITCH
The minimum roof pitch for profiled roof sheets is 5º, however roof
pitches of 3º are allowed for short lengths. For corrugated sheets we
recommend the roof pitch should not be less than 10º.
Check this site
www.cladco.co.uk/install.htm

There is a problem with very shallow pitches in that the water doesn't
drip cleanly from the edge but wicks back up the underside. You can
cheat by bending a small vertical *drip* in box section rolled steel but
not easy to do on corrugated stuff.

regards

--
Tim Lamb