Chinking - Notice the upper left and lower right where the logs have been left unchinked. Wind can easily blow rain between the logs and rot the log wall from the center on down. This creates a highway for insects! Chinking decreases your home's vulnerability to insects, decay, water and drafts.
All the gaps in a log structure are a natural nesting area for a multitude of insects. Quality chinking, when installed by skilled craftsman, is a long lasting product and if necessary, can be repaired easily.