Thanks Guys,
We had to think hard about what to put on the roof, some sort of sheeting would have been easier, but not as good long term.
The pro's and cons were
Sheeting, cheaper and easier but not as nice looking or long lasting. Hot in summer, cold in winter.
Slate, very expensive, never done it before and a lot of work. better heat regulation all year round, plus we are going to insulate it as well. (I must be getting soft)
We are glad we chose slates, though it's not cheap. I should never have to attend to the roof again on my lifetime which was the deciding factor. I'm not getting any younger you know

And if we sell the place at a later date we should get a good return on our investment.
