How to Repair a Crack in a Prefab Fireplace?

Whether you have a pre-fab fireplace or an old masonry unit, you will eventually need to repair cracked refractory panels. Refractory ceramic or metal fireplace panels are designed to withstand the high temperatures that are created when a fire burns. During the burning process, the refractory material in the panel absorbs the heat and prevents it from reaching the combustible materials around the firebox. 

(For a gas fireplace replacement, contact us today!)

In the event that a crack in a fireplace occurs, it is crucial to repair it right away. Cracks in refractory panels are an indication of deterioration, which can be a safety hazard. Moreover, the firebox itself may have other signs of deterioration, such as damaged mortar joints. This may result in water leaks and other problems. 

For a do-it-yourself fix, you can replace small or large cracks. Regardless of the size, you will need to remove the affected panel, and then clean the brick and mortar joints thoroughly. Use a stiff-bristle brush to gently brush off any ash and soot. Then, use a shop vacuum to thoroughly vacuum any dust from the mortar joints. 

Prefabricated fireplaces can be extremely dangerous if left in disrepair. These types of fireplaces are prone to developing cracks and deterioration due to years of exposure to extreme heat. Depending on the size of the cracks, the panel may need to be replaced altogether. 

If you are unsure of what to do or how to repair a cracked refractory panel, you can consult a fireplace repair professional. Some manufacturers have specific guidelines for repairing cracked panels. They may recommend that you only replace the affected part of the panel or limit the repair to the most minor cracks. 

You can repair the cracked area of refractory ceramic or metal panels with refractory caulk. Unlike conventional caulk, refractory caulk contains silica for thermal resistance, which makes it an ideal solution for fireplace repairs. It can be applied to the edges of bricks or to the joints between firebricks. Once it is applied, it usually cures in about one hour. 

If the crack in your refractory panel is large, you will need to remove the affected panel and replace it. The damaged panel is located at the bottom of the firebox. To replace it, you will need to remove the side and rear panels. 

Before you begin repairing the cracked refractory panel, make sure you read the manufacturer’s installation instructions. Many fireplace manuals do not indicate how to replace cracked panels. When replacing a cracked panel, it is essential that the new panel fit snugly against the existing ones. 

A professional chimney contractor can fix larger cracks. He or she can also replace the entire fireplace if needed. 

Using a high-temperature paint can help to hide the patched area. However, this does not provide the same protection as refractory caulk. Make sure you do not use your fireplace until all of the repairs are done. Otherwise, you could be in danger of an accidental house fire.