Smoke Chamber & Firebox Repair



The smoke chamber and firebox are subject to extreme temperatures and direct flame contact. Direct flame contact from a wood fire can reach over 1800 degrees F. Masonry brick can thermal transfer the heat from a wood fire to existing wood structures (ignition point of 525 degrees F. or lower) and combustible materials if thermal protection is not adequate. Fire brick is designed to block thermal transmission of heat (from 1750 degrees F. to 3150 degrees F.) depending upon grade and it is the material of choice for firebox construction.
Despite the NFPA having very rigid requirements for fireplace and chimney construction many fireplaces and chimneys exist with inadequate thermal protection.  Common issues are improperly sized mortar joints, mortar joints filled with standard mortar rather than refractory or furnace cement, improper selection of firebrick for firebox and smoke chamber construction, and improper design.
We inspect and evaluate the condition of every fireboxes and smoke chamber during our NFPA level 1 inspection service. If minor deficiencies are found we can typically repair these on site during the same day visit. If major deficiencies are found or drafting problems exist, we may suggest parging the smoke chamber or firebox with a insulating refectory cement product such as Chamber-Tech 2000 or Chamber Coat. Chamber Coat comes with a 20 year warranty and is designed to withstand temperatures up to 2550 degrees F. An application of Chamber Coat to the smoke chamber can smooth jagged edges and exposed corbels while reshaping the smoke chambers for a stronger, more efficient draft and help reduce creosote buildup.

 

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