The flax mill in Trolldalen consisted of 10 different buildings: overnight cabins, flax sheds, a flax sauna (drying), several crushing hammers and scutching wheels (all powered by water). It was built by farmers from Rängsjö (about 8 kilometres away) who had no access to a stream. The newest buildings date from 1904, all others are from the early 19th century.
Work was done in shifts over several days. The men operated the hammers and the women the scutching wheels. When the Rängsjöers were finished, the mill was also available to the local farmers. In addition, the shives and the coarse tow were popular insulation material that the people in the area could pick up for free.
Over 1000 of these water-powered production facilities existed exclusively in Hälsingland. The idea hardly spread beyond the region's borders. Today, a good dozen of them are still preserved.
On-site demonstrations are also held in June and July.