The message
from T i m contains these words:

On Mon, 10 Mar 2008 16:00:15 GMT, Appin wrote:


Have you considered using Decra tiles?

Not till now. ;-)

-- very easy to put in position
single-handed. Excellent end result.

It looks like they are designed to be alternatives to traditional
tiles / slates on traditional roofs? ie, I'm not sure they would suit
the big open frame that is my sort without some sort of sub roof
sheet?

Certainly need something to fix them down to, but the end result is a
great deal better than most of the alternatives, imho.