Firebox lining repair across Colee Hammock
Upfront pricing for each wall of the firebox, with anything newly found priced before it is added.
- Owned and run locally
- Available for same-day service
- Fully licensed and insured
- Family owned and run
Firebox damage worth a closer look
- Cracks running through a firebrick
- Corner joints opening
- Uneven or sunken firebox floor
- Spalled units above grate height
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Firebrick, refractory mortar and the repair plan
Deep voids behind the joints are filled in layers
Some joints lose mortar well below the surface. Refractory mortar makers note that deep cracks and joints should be filled in layers, letting each layer set before the next. One thick fill can shrink and pull away.
Where a void runs deeper still, a castable refractory product may be the better material. We look at the depth before choosing, and the estimate names the product and the method. That keeps a quick surface repair from hiding a hollow joint that will fail at the next hot fire.
Factory-built units lined with the maker's firebrick
Some factory-built wood fireplaces are lined with firebrick supplied by the maker, placed in a pattern shown in the installation manual. Those bricks are listed parts of the unit, not general masonry.
Replacements come from the maker's parts list for that model and go back in the positions the manual shows. We read the label, find the manual and check that the layout matches before ordering. Loose-laid units in these fireboxes are not mortared in unless the manual says so. The written record of the work names the part numbers used, so a later repair can match them.
The written record of firebox work
A finished firebox comes with a written record of the work. The record lists the walls and areas repaired, the units replaced, the joints repointed and the mortar product used.
It also notes the curing steps still to follow and anything we saw but left as it was. Keep it with your fireplace papers. If the firebox needs attention again, the record shows exactly what was done and when, which saves guesswork. It also helps when you sell the home or bring in anyone else to look at the fireplace.
The product's directions set the details
Refractory mortars and castables each come with their own directions for surface preparation, joint depth, layering, drying and curing. Those directions decide the details of the repair as much as the code does.
We follow the directions for the product we use and tell you which one it is. If a step, such as the heat cure, falls to you, the written record of the work spells it out. That way the repair is finished the way its maker intended, not cut short at the last stage.
What we check before pricing firebrick work
- Lining type identified
- Repair boundary set at sound material
- Units cut for slopes and edges
- Room and hearth protection
Questions about firebrick and mortar
Why do the joints in my firebox keep crumbling?
Common causes are the wrong mortar, joints not filled through their depth, water reaching the firebox, or very hot fires behind closed glass screens. We look for which applies before recommending a repair.
Can a high-temperature caulk seal firebox cracks?
Only if the product is a refractory mortar made for firebrick joints. Many heat-resistant sealants are made for lower temperatures and char or shrink in the fire chamber. We read the label before anything goes into a joint.
What does the workmanship warranty cover on firebox work?
It covers the units we set and the joints we filled, cured and used as directed. Damage from overfiring, an unrepaired leak or parts outside the repaired area are not included. The written record shows the covered work.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo