Does Your Firewood Make a Dull Thud? It Might Not Be Ready to Burn

Before you toss another log into the fireplace this fall, try an old-fashioned trick: knock two pieces of firewood together and listen.

Do they make a sharp, almost ringing sound? Or do you hear a dull, heavy thud?

That simple test can tell you something about the wood you’re planning to burn. Dry, seasoned firewood often makes a clearer sound when struck, while wood that’s still holding too much moisture tends to sound muffled.

It’s a useful clue, but there’s a catch. Sound alone can’t tell you whether your firewood is ready for the fireplace.

What Does Seasoned Firewood Sound Like?

Seasoned firewood is wood that has been allowed to dry after cutting and splitting. As it loses moisture, its burning characteristics change.

According to University of New Hampshire Extension, you can get a rough idea of how dry firewood is by knocking two pieces together. Dry wood tends to produce a ringing sound, while wetter wood makes more of a thud.

It’s the kind of simple test you can try while stacking a fresh delivery of logs.

But don’t treat it as a guarantee. Different wood species and pieces can sound different, and even a log that seems dry on the outside may still hold considerable moisture inside.

The sound test is a starting point, not a substitute for checking moisture.

Other Signs Your Firewood Is Dry Enough to Burn

Take a closer look at the ends of your logs.

As wood dries, it often develops cracks radiating through the end grain. These cracks, sometimes called checks, can be a sign that moisture has been escaping.

Seasoned wood may also feel noticeably lighter than freshly cut wood of the same species and similar size.

West Virginia University Extension identifies cracked ends, lighter weight, and a sharper sound as useful clues when judging whether firewood has dried.

Still, none of these signs is foolproof. Cracks at the ends don’t necessarily mean the center has dried sufficiently, and comparing the weight of different kinds of wood can be misleading.

If you want to know whether your firewood is truly ready to burn, there’s a more reliable test.

The Most Reliable Way to Tell If Firewood Is Seasoned

A wood moisture meter takes much of the guesswork out of the process.

The U.S. Environmental Protection Agency recommends burning properly dried firewood with a moisture content of 20% or less.

That number matters more than how long the wood has been sitting in a pile.

To check it, split a log open and press the probes of a wood moisture meter into the freshly exposed wood, following the meter’s instructions. Testing the outside of a log alone can give you a misleading impression because the surface may be drier than the interior.

Check several logs from different parts of your stack rather than relying