The roof has two parts. Above the living-tract there are larch-shingles, above the barn rye-thatch. The larch is a coniferous tree which grows at height of 1200m above sea level. Larch trees line up to now the path, which leads to the entrance of the museum. The larch-wood is very resistant against rot and termites. It becomes very hard and sturdy without any treatment, only through the influence of sun, rain and wind.
Over the centuries rye-straw was one of the cheapest roofing materials. The straw of a special kind of long stalked rye was fixed in bundles to the top of the roof construction using willow switch. Every year parts of the roof have to be restored; this roof needs about 8 tons of straw and the whole roof should be changed every ten years to guarantee durability.