The firebox is the innermost chamber of your fireplace and endures temperatures that can exceed 1,000°F during a hot wood fire. Standard mortar and common brick are not designed for this environment; firebrick and refractory mortar (castable refractory cement) are required. Over years of thermal cycling, even properly built fireboxes develop cracked firebrick, eroded refractory mortar joints, and spalling surfaces that create direct pathways for combustion gases to reach combustible framing materials.
Campbell Brothers Chimney Sweep performs firebox tuckpointing by carefully removing deteriorated refractory mortar to a minimum depth and packing the joints with fresh high-temperature refractory mortar matched to the original specification. Cracked or broken firebrick are replaced individually or in sections rather than patching over them, ensuring the repair performs under actual fire conditions. We also repair deteriorated smoke chambers and smoke shelves using parge coat applications of UL-listed refractory mortar.
Firebox repairs are among the most safety-critical services we offer, and we take them seriously. Every firebox repair is followed by a visual inspection of the damper and lower flue to confirm that no related issues exist upstream of the repair area before the fireplace is returned to service.
- Licensed and fully insured technicians
- Free estimates and upfront pricing
- Same-day and emergency service available
- Commercial and residential expertise
- Satisfaction guaranteed on every job
- Locally owned — we know your area