Chimney Repair
Southside Greenville

Gas burns at a lower temperature than wood or oil. Lower flue temperatures mean that water vapor produced by gas combustion condenses on the cooler liner and surrounding masonry surfaces before fully exhausting. This condensation is mildly acidic and cycles through wet-dry sequences on the mortar joints with every use cycle. Over decades in a Southside masonry chimney — particularly one where the liner was never replaced after the fuel conversion — this repeated moisture cycling softens and dissolves mortar faster than high-temperature wood combustion would.

Interior condensation damage typically presents as efflorescence (white crystalline mineral deposits) on the exterior masonry, indicating moisture is migrating outward. Inside the firebox, mortar joints may feel soft or powdery when probed, even though the brick faces look intact. The smoke chamber often shows staining from acidic condensate, and the crown tile collar joint is frequently open — creating a direct water entry path that accelerates interior moisture levels.

Exterior mortar tuckpointing approximately $350–$900. Interior firebox joint repair with refractory mortar approximately $300–$700. Smoke chamber parging repair approximately $400–$850. Crown repair approximately $250–$650. Full scope and pricing confirmed on-site before work begins.