When you build a log home, in most cases the logs are laid horizontally one course on top of another until they reach the prescribed height of the wall. As each log is put in place one on top of another, the attachment procedures and sealing procedures are critical to structural stability and weather tightness. If the procedures are not well thought out or are not followed according to the log home companies guide for construction, gaps and openings can produce poor insulating qualities and structural problems.