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Why Does Burning Wood Pop. If you place a pot of water on the stove and activate the burner, it will evaporate as steam. As the trapped moisture heats up, it will.
This same principle rings true when burning wet or moist firewood. The sap/pitch liquifies, then vaporizes as the temperature increases. In basic terms, it has something to do with the combustion gases escaping from the wood.
If you place a pot of water on the stove and activate the burner, it will evaporate as steam. When the wood is burned, combustible gasses will be released. The holes created by the insects will give the gasses an escape route.
In all actuality, these popping and cracking sounds are coming from a chemical reaction inside of your fireplace. Gas is created by trapped moisture locked in small pockets within the wood. Trapped moisture can also cause wood to pop and crackle from the creation of steam.
Unlike wood, water doesn’t convert into heat when burned. Gases expand rapidly when heated. These air pockets fill narrow passages within the wooden log.
As the wood burns the moisture is heated, and as the moisture is heated it expands and turns into gas. Firewood popping occurs when burning wood has a high moisture content. As they expand, they put tremendous pressure on the walls of the pockets.
As the wood heats up, the warmth penetrates deep into these pockets. As the trapped moisture heats up, it will. The sap/pitch liquifies, then vaporizes as the temperature increases.
