The same building technique using logs was unknown in Scandinavia until the 11th century, the time of the closest cooperation and intermixing between the Norse and the Slavs. This all indicates that log cabins and fortifications are a Slavic cultural import into Scandinavia.
When looking at the introduction of the joint timber houses in the Germanic areas of the Baltic, we have to look at the Jutland and other Danish areas of the southern Scandinavia separately from the Northern areas of Scandinavia. These two areas were politically and culturally separate and were linked to different Slavic tribal group. The Danes were politically and culturally linked with the Western Slavs (Polabians, Obodrites, Serbs, Poles) and the Norse and Swedes were politically and culturally linked with the Eastern Slavs (Rus). There is no wander then that in these two areas of Scandinavia we find two different types of the joint timber construction techniques.