Let Your Logs Breathe: Avoid Overzealous Caulking

Exterior log wall with naturally occurring checks prior to restoration.

When it comes to log homes, it’s tempting to slather on paint, caulk, or chink in every little check and crack on the exterior. But here’s the thing—your logs need to breathe.

Moisture naturally gets trapped in wood over time, and if it cannot escape, it can lead to rot, mold, or other long-term damage. A solid coat of paint or overzealous caulking might look tidy, but it can trap moisture inside and do more harm than good. The exterior of your log home should allow for this natural breathing, letting moisture drain or evaporate and keeping your home healthy.

That being said, there are areas where caulking is important. Significant checks about a quarter of an inch or larger that are upward-facing and especially lower logs exposed to rain runoff or snow buildup should be sealed. These spots collect water and debris, and sealing them properly helps prevent damage while still letting the rest of your wood breathe.

Some manufacturers offer caulks that coordinate with their stain colors, so the sealant blends seamlessly with your exterior logs rather than standing out. Inside, finishing is still important, but because interior logs aren’t exposed to weather, they can be coated more fully to protect the wood and highlight its natural beauty.

The takeaway? Use caulk and paint wisely—don’t encase your exterior logs, and let them breathe for a healthier, more beautiful home.