Quick update: yesterday we finally got the confirmation from the local planning authorities that it'll be ok to use the usual Huf Haus darkish grey roof tiles.
A big relief this, as many alpine local governments (Berg-Gemeinde) insist on bright and cheerful red roofs for new builds, so they fit in better with the existing village's sea of bright and cheerful red roofs. A worry, 'cos a Huf Haus with a red roof looks wrong, to my eyes. A bit like a Rolls Royce painted yellow, or a Ferrari painted anything but red. Right? Right.
Anyways, Herr Arkitekt (he of the bow-tie) will be informing those good folks at Huf Haus of the colour confirmation. And in good time too, 'cos the latest possible deadline for ordering the tiles is, erm, today.