Why Are There Cracks in My Firebox?

The many components of fireplaces and chimneys need ongoing maintenance because they are vulnerable to damage. So, you may find yourself asking, ‘Why are there cracks in my firebox?” Taking notice of this situation is particularly important because, whatever the cause of the cracks, repairs are essential. Due to the functions of the firebox, it is dangerous to continue using the appliance until repairs have been made. Below, learn the what’s and whys of cracks in your firebox as well as who to call if you live in the Dubuque IA area.

What’s the Purpose of the Firebox?

Fireboxes generally have either firebricks and refractory mortar or, if you have a prefab fireplace, refractory panels. These heat-resistant materials inside the firebox are made to withstand high temperatures. Your home and family are protected from two life-threatening hazards as long as the firebox is intact. Those dangers are pyrolysis and exposure to potentially deadly fumes; more details follow.

Protect from Pyrolysis

When a firebox becomes cracked, the surrounding combustible materials could become an explosive tinderbox ready to ignite without warning. This happens through a process known as pyrolysis. As the vulnerable materials are repeatedly exposed to high temperatures, they are changed in that the temperature at which they can ignite is significantly lowered. Countless quick-spreading house fires have been caused by pyrolysis as heat exposure causes flammable materials to suddenly ignite.

Protect Against Exposure to Carbon Monoxide

The other essential function of the firebox is to prevent toxic combustion fumes from entering the home. When there is deterioration, such as a crack, deadly carbon monoxide (CO) fumes can threaten the lives of the home’s occupants. What makes CO especially dangerous is that you can’t see it, taste it, or smell it. Even worse, no symptoms of exposure are obvious until it becomes very difficult to safely escape the fumes. Carbon monoxide detectors should be installed and operational in all recommended locations before using any solid-fuel heating appliance in the home.

Why are There Cracks in My Firebox? 

It is not unusual for a firebox to have cracks, and there are four basic reasons such deterioration may occur, as detailed below.

Wear and tear. Fireboxes don’t last forever. Depending on various factors, the lifespan of fireboxes is generally between 10 and 30 years.

Moisture. The most destructive force that comes against chimneys and fireplaces is moisture intrusion.

Lack of maintenance. Annual chimney inspections include an assessment of fireplaces, as well. If ongoing maintenance is neglected, there should be no surprise when cracks develop in a firebox.

Movement. If the foundation of your home shifts, it could cause cracks in the firebox. Major weather events can also cause the same type of damage.

Who to Contact: Dubuque Fireplace & Patio

Take action without delay if you notice cracks in your firebox. Contact Dubuque Fireplace & Patio for firebox repairs, chimney inspections, chimney cleaning, and all of your fireplace and chimney needs. We can also install a new fireplace for you after helping you choose the right one for your home.

Call us at (563) 582-5156 today!