Felt

Houses in France generally don't have felt under the slates or tiles. It became standard in the UK in the 1930s, with heavy bituminous roofing felt or sark - which has more recently been replaced with a lighter breathing membrane. Generally speaking the UK is wetter and windier than France so the felt stops water than has been blown up the slates or tiles from dripping into the house, or provides protection should a slate or tile slip. In both countries a well built roof in good condition shouldn't actually need any roof felt at all.

Here you can see modern breathing felt has been laid over the rafters, and then counter battens which have been nailed to the rafters beneath them. I'm guessing that the battens for the slates will go on later this week. Apparently the counter battens aren't required, the actual battens can go directly onto the felt, but adding counter battens does give better ventilation.

Work is light at the moment, but I'm managing to more or less fill my days. After work I take the dog for a good walk at the Hippodrome which he likes best of all. He gets three additional walks during the day as well. My mother-in-law should walk her dog but her hip isn't so good at the moment, walking would help her bond and the exercise is good for you in general.