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Firebox Repair

Our fireplace firebox repair service provides professional inspections to identify and repair damages in masonry or prefab fireboxes. From repairing cracks and rust to complete replacements, our expert technicians ensure your fireplace is safe and functional for years to come.

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What is a fireplace firebox?

The fireplace firebox is an essential part of your fireplace and chimney system, directly housing the fire you burn. This key component is typically box-shaped, with three walls and one side open to the room. The firebox is designed to contain the fire and direct the heat into the room while also preventing the flames and embers from escaping into the surrounding area. This allows smoke and heat to safely travel up and out of the chimney through two openings, the one at the front and on top.

Well-built fireboxes are designed to keep exterior walls and combustible wood beams safe from intense heat. For optimal safety, ensure that your firebox is made of non-combustible materials like masonry, refractory mortar, or firebrick. Prefabricated metal fireboxes are also available depending on the fuel type (wood-burning, gas, or electric).

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Fireplace Firebox Repair and Replacement

It’s crucial to be aware of any damage or potential safety concerns with your fireplace firebox. If you do come across any issues, don’t worry – you have the option to replace and upgrade your firebox. Even though masonry fireboxes are designed to last a lifetime, it’s not uncommon for cracks to develop in the bricks or mortar joints over time. Prefab fireboxes, on the other hand, need replacements to ensure that the exterior combustibles are protected. If the refractory panels start to crack or rust, it can expose the combustibles to high heat from the fire, posing a significant fire hazard. That’s why a cracked firebox in a fireplace should be repaired immediately. Although a well-maintained prefab system can last a long time, factors such as water leaks, excessively large fires, or natural aging can lead to failure of the firebox panels.

The good news is that you can prevent these hazards by scheduling your annual chimney inspection with Eco Grizzly. During the inspection, our technicians can identify any issues with your firebox and take the necessary steps to repair or replace it. If the damage is minimal, your technician will likely repair it. However, if something more serious is discovered, our experts will recommend a replacement.

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What Are The Different Types of Fireboxes?

Masonry Firebox: Made of brick or stone, this traditional firebox is durable and retains heat. Constructed by professional masons using refractory mortar, it features a slanted back wall to funnel smoke up the flue. While more complex to build, it offers durability and a traditional look. Originally for wood-burning, it can be converted to gas or fitted with a firebox insert.

Prefabricated Firebox: Factory-built and assembled on-site, it protects exterior components from heat like a masonry firebox but uses different materials.

Decorative Firebox: Found in factory-built fireplaces, these feature large ceramic panels textured to resemble brick. The panels, floor, back wall, and side walls are typically one piece.

Metal Firebox: Made of steel or cast iron, these pre-fabricated fireboxes are quick and easy to install.

Zero-Clearance Firebox: Designed to be installed against combustible materials, it has special insulation to prevent heat transfer and reduce fire risk.


See-Through Firebox: Open on two sides, this firebox allows viewing from two rooms simultaneously.

Corner Firebox: Fits into a room corner with two open sides.

Linear Firebox: Long and narrow, ideal for modern or contemporary designs.

Outdoor Firebox: Made of durable materials like concrete or stone, this firebox is designed for outdoor fireplaces or fire pits.

Fireplace Firebox

Fireboxes are vital to the proper functioning of your chimney system because they protect combustible material in the chimney from intense heat and help funnel smoke to the outside. Without it, authentic wood and gas fire experiences would be impossible to enjoy.

With annual maintenance by one of our certified technicians, you and your loved ones can continue to enjoy the coziness of your fireplace safely.

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