Keith, do check out your builder, make sure he is registered, make sure he has insurance and check references from people who have had similar work done. I agree 40k sounds like a lot of money for such a small roof, but so does 20k to me, but if all the French are asking 40k and he is the only one asking 20k and he is available immediately, something doesn't add up here. Make sure you are comparing apples with apples. There are some dodgy blokes around. Sue