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Why Does Wood Pop When Burning. Trapped moisture can also cause wood to pop and crackle from the creation of steam. These air pockets fill narrow passages within the wooden log.
When the wood is burned, combustible gasses will be released. As the gas escapes, the fire will emit an audible pop or crack. Although your piece of wood may look and feel quite dry, it definitely has some moisture locked inside of it.
Trapped moisture can also cause wood to pop and crackle from the creation of steam. In basic terms, it has something to do with the combustion gases escaping from the wood. This same principle rings true when burning wet or moist firewood.
Gas is created by trapped moisture locked in small pockets within the wood. Firewood popping occurs when burning wood has a high moisture content. Hence, there will mostly be some moisture in the wood.
The popping noise occurs when air pockets in the wood are released. Some will get stuck in the wood. These air pockets fill narrow passages within the wooden log.
If you place a pot of water on the stove and activate the burner, it will evaporate as steam. As the wood burns the moisture is heated, and as the moisture is heated it expands and turns into gas. The holes created by the insects will give the gasses an escape route.
All trees need to take in water to survive. When the wood is burned, combustible gasses will be released. As the gas escapes, the fire will emit an audible pop or crack.
