Cracks in logs cause more unnecessary worry than almost anything else.
Let’s clear this up.
What Are Checks?
Checks are natural cracks caused by:
- Drying
- Seasonal movement
- Temperature changes
They are normal and expected.
Normal Cracks (Safe)
- Run lengthwise
- Open and close seasonally
- Are shallow
- Stay dry inside
These do not weaken the log.
Problem Cracks (Not Safe)
- Hold water
- Are wide and deep
- Stay dark inside
- Grow year after year
These allow moisture into the heart of the log.
Should You Fill Cracks?
Sometimes.
Fill only when:
- Water is entering
- The crack stays wet
- There’s evidence of decay
Never fill cracks just because they exist.
The Biggest Mistake Homeowners Make
Sealing everything.
Logs need to move and breathe. Over-sealing traps moisture — and causes the very damage people are trying to prevent.
Bottom Line
Cracks are part of log homes.
Wet cracks are the problem — not cracks themselves.