Lots of layers to the roof:
first the roof rafters:
then the same 80mm woodfibre that covered the walls, providing insulation:
then the membrane covered the whole thing, including – temporarily – the roof light openings, and the battens:
Next came the sarking, which is a pretty major difference between constructing a Scottish and an English roof. In England, generally a roof just has batons. In Scotland they use sarking boards that are wooden boards that cover the whole roof. It provides better protection from the weather, both rain and wind, so aside from the negative of using more materials (and cost), seems to make sense.
photo: 3 November
And a big sigh of relief, as the house is now not nearly so open to the elements, although still plenty of holes and gaps for water to seep through. The roofers due on site within a week to start the slates.
And next up, the standard roof membrane and slates. And the roof lights.