Abstract
Log is a highly topical building material. Despite the current potential of log, large-scale log buildings of high architectonic quality are rare. By increasing understanding of the architectonic quality of industrial log building, the quality of future log buildings can be enhanced. Our research data is based on the outcomes of two recent architectural competitions and interviews related to these. Methodology combines semi-structured interviews with research by design. The results describe, in the scope of tectonics, architectonic features that are essential for architectonic quality of a log building and are revealing of log structures, acknowledging the preconditions of log in the design, and making secondary design solutions characteristic for log. The results are coherent with ideals of tectonic theory