Chimney Rebuild and Liner Installation in Doylestown, PA — Structural Restoration on a 1940s Colonial

The double-wythe brick chimney on this 1940s Doylestown colonial had deteriorated to structural concern — the upper six courses above the roofline showed significant spalling on three faces, mortar joints had eroded to 3/4-inch depth opening on the north and west exposures, and a Level 2 camera inspection had confirmed a hairline crack in the original clay tile liner running the length of the upper flue section. The homeowners had been using the wood-burning fireplace with a compromised liner for at least one heating season.

We began with a full structural assessment of the chimney from the smoke chamber up, confirming that the below-roofline courses were sound and the rebuild could start at the roofline rather than requiring a full demolition-to-firebox scope. The deteriorated six courses were removed, the remaining masonry was cleaned and toothed for a proper bond, and we rebuilt the chimney to its original height using matching modular brick — the Bucks County area has reliable reclaimed brick sources that allow near-seamless aesthetic matching on older colonials.

The new liner is a 6-inch stainless steel flexible liner installed full-length from the smoke chamber to the cap, with stainless termination hardware and a HeatShield smoke chamber resurfacing application at the base. The crown is cast-in-place concrete with a proper 2-inch overhang drip edge — replacing the original mortar wash crown that was the primary water entry point. The completed chimney was inspected and cleared for use before the end of the 2024–2025 heating season.