QA

Quick Answer: Why Do Fires Crackle

When wood in a fire gets hot enough, the cellulose inside starts to turn into gas. As wood burns, the mix of expanding gases and cellulose breaking down makes the pockets of trapped steam burst open from the wood, one by one. This is why you hear the crackling and popping noises.

How do you stop firewood from popping?

To minimize popping and crackling, use kiln dried firewood to build your fires. As the name suggests, kiln dried firewood gets placed into a heated kiln. Some kilns are powered by electricity, whereas others are powered by steam or even solar energy.

What wood crackles most?

Firewood For A Crackling Fireplace Fir and Pine produce very good wood for a crackling fire. Out of the two, Fir is the most recommended. It has a wonderfully fresh aroma that can create the perfect holiday ambiance. Pine is fine but it has a tendency of causing oily soot deposits around the house.

Why does Fireplace Pop?

Creosote buildup can pop as it heats up in a dirty chimney. The popping itself is not so bad, but it could be a precursor to a life-threatening chimney fire. On the other hand, if the popping you hear is just the sound of metal moving, this is normal. Metal expands when heated and contracts when cooling.

Does wet wood hiss and crackle?

Once the firewood hits your fireplace or stove, you’ll immediately be able to tell if the wood is dry enough: Wet wood will hiss and let out a thick, bluish smoke, while properly seasoned firewood will crackle and pop pleasantly and will not issue an excessive amount of smoke.

What kind of wood pops when it burns?

Not only does fir and pine smell like Christmas trees, these types of logs create a pleasant crackle and pop in your fire. These are softwoods which dry quickly, are easy to split, and create lovely crackling fires. Before burning fir or pine, be aware that the popping throws a lot more sparks than other firewood.

How can you tell if firewood is seasoned?

Seasoned wood will be darker in color than green wood, and may be cracking at the ends. Seasoned wood can also lighter in weight and the bark can be peeled off more easily than unseasoned wood. A moisture meter will be able to provide an accurate reading of whether firewood is fully seasoned or not.

Which firewood pops the most?

Seasoned softwood logs have the potential to produce more pops compared to kiln dried hardwood logs because of higher moisture and sap levels. Wood with higher sap content, such as softwood logs, can act much like trapped moisture escaping the wood and making the traditional fireplace sounds.

Why does some wood crackle?

When wood in a fire gets hot enough, the cellulose inside starts to turn into gas. As wood burns, the mix of expanding gases and cellulose breaking down makes the pockets of trapped steam burst open from the wood, one by one. This is why you hear the crackling and popping noises.

What type of wood creates the most creosote?

In general, hardwoods like oak, ash, and beech are more difficult to ignite, but they last a long time. Softwoods like fir, pine and cedar make more smoke, and therefore more creosote.

Is it normal for a gas fireplace to pop?

It isn’t uncommon to hear certain noises like popping and clicking in the first few minutes after turning on the fireplace. Such sounds are nothing more than the metal components expanding as they warm up, and should disappear within several minutes.

Why does my fireplace make a banging noise?

The fireplace may produce a banging noise during operation. This noise is caused by metal expansion and contraction as it heats and cools. This noise typically occurs when the fireplace is just starting up. It does not effect the operation or cause damage to the fireplace.

Is it normal for fireplace to make noise?

In the course of operation, it’s normal for a gas fireplace to make some noise. If a similar noise is heard when the burners are on, it’s a likely sign of dirty burners, which will require cleaning. A high-pitched shriek or the sound of grinding may be caused by a faulty blower.

Does wet wood hiss?

Another byproduct of burning wood that is too wet can be hissing noises coming from the fire. Firewood can produce a hiss noise as the excess moisture within the wood heats up and tries to escape. The higher the moisture content of the wood the more the firewood can hiss when used in a fire.

Does wet wood sizzle?

The wetter the wood, the more heat energy is consumed. That is why wet wood hisses and sizzles while dry wood ignites and burns easily. As the wood heats up above the boiling point of water, it starts to smoke.

Why does wood spit on a fire?

Inside the wood there is a labyrinth of microscopic pockets and pores which contain fluids such as water and sap. Eventually, the wood gives way and will split to release this gaseous steam into the fire. The sound you hear is the sound of what is actually a mini-explosion that results in the wood rupturing.

Does hickory wood pop?

You get little piles of sawdust all in you wood stacks as the bugs bore into hickory. Hickory also pops and throws lots of sparks too.

Why does Cedar Pop burning?

All types of wood make sounds when they burn, but cedar wood is particularly noisy because it contains large pockets of moisture as well as lots of resin. Resin is an oily, highly-flammable substance, so it creates more cracks and pops when the wood burns.

What wood should you not burn?

Watch out for any wood covered with vines. Burning poison ivy, poison sumac, poison oak, or pretty much anything else with “poison” in the name releases the irritant oil urushiol into the smoke.