Buying a Log Home? Here’s What You Need to Know About Cracks, Checks, and Chinking

Those Cracks in the Logs—Should You Worry? 
​If you’re considering buying a log or timber-frame home, you may notice long splits or “cracks” running through some of the logs.

Don’t panic — what you’re seeing is usually common log checking, and it’s a normal part of how wood naturally dries and settles over time.

As the logs dry, the outer surface loses moisture faster than the core, causing small splits called checks. These do not mean the home is falling apart — in fact, nearly every log home has them.

🟠 Tip:
Minor checking is normal and rarely affects the home's structure. However, large upward-facing checks can hold moisture and may need to be sealed to prevent long-term damage.

When Checking Becomes a Concern
While most checking is harmless, here’s when it can become a problem:

• Deep or upward-facing cracks that can collect rainwater
• Unsealed checks that allow water or insects to enter
• Logs near the ground that show signs of soft or darkened wood

In these cases, a professional inspector familiar with log home construction should evaluate the issue and recommend appropriate sealants or repairs.

🟠 Tip:
Ask your inspector if they have specific log home experience. Most general home inspectors do not.

Chinking: The Seal Between the Logs
If you see material between the logs, that’s called chinking. It seals gaps and helps keep the home weathertight. Older log homes sometimes used cement-based chinking, which traps moisture and accelerates decay. Modern chinking products, such as Perma-Chink, Big Stretch, or Log Jam by Sashco, are flexible and breathable, allowing the logs to expand and contract naturally.

🟠 Tip:
If the home you’re buying has old, rigid mortar-style chinking, plan to budget for replacement with modern materials over time.

Spotting Real Problems vs. Natural Aging 
A seasoned inspector can tell the difference between normal checking and serious issues, such as:
Checking
Shallow surface splits from dryingUsually harmless
Rot
Soft, dark, or crumbling woodMoisture problem — needs repair
Insect Damage
Small holes or tunnels, sawdust (frass) nearbyPossible infestation
Weather Damage
Grayed, eroded wood in sun-exposed areas needs cleaning and resealing

​🟠 Tip:
A log home should be stained or sealed every 3–5 years to protect against sun and water damage.

Before You Buy: What to Ask and Inspect
When purchasing a log home, be sure to check:

• When the logs were last sealed or stained
• What chinking material was used
• Whether the home has proper overhangs and drainage
• If any log replacement or repair has been done
• Whether the inspector specializes in log home inspections

Trust the Log Home Experts
At Trace Inspections, we inspect more log homes than any other home inspection company in Tennessee. We know what’s normal, what’s not, and how to help protect your investment for years to come.
Whether you’re buying your first log home or relocating to one in the hills of Tennessee, our experienced inspectors will give you the confidence you need before closing.
📞 Call Trace Inspections at 615-302-1113
🌐 Visit TraceInspections.com
Trusted by home buyers across Middle Tennessee and beyond.