What are log checks?

Checks are cracks that split open on logs. Logs try to equalize with outside humidity. Logs should have a moisture content under 20 percent
.

Where your logs were dried or kiln-dried before your structure was built.

Checks should be sealed if over 1/4" wide and on the top/curved section of the log.
Use Permachink log check to seal these areas.

Water can settle in these open checks. Checks near windows can cause more problems.