SAUNAS A reasonable way to construct a sauna  In our experience a solid log construction is most suitable for smaller cottages when the settling of the construction is a minor matter when higher insulation is not needed like in a house that is habited throughout the year.  Lapponia Sauna cottages are made of 4” x 7” solid logs. Lapponia House shows you that also a sauna cottage can be made better than usually.