The roof-frame was done within two days. It was really quick. The guys from the company fertighausok.at were really profesionals. They were just three of them and complete job (also with roof tiles) had been done within a week.
We decided to have a roof made from concrete roof tiles. Although they are heavier than tiles made of clay, we found a new type of roof tiles covered with special layer which protect the concrete well against rain and snow. The colour is stable very much as well (lets see after a few years if they are right ;).
Quite challenging was to cover the whole roof frame with a canvas as it was really windy that day.
After finishing laying the roof tiles, the house got a totally new shape.
We finished the roof in the first week of March.