@nprofile1q... I am really into how it's built.Wanna learn to build those one day. Especially external walls layers. Do you know? As far as I've read most important thing is to avoid moisture build up in walls by making sure every layer going from inside to outside is more, not less open to water vapour transpiration. That's supposed to be a reason scandi homes last forever and american last 30 years or sth because of OSB boards on both ends that trap water inside wall.