When a Chimney Is Past Patching
Some chimneys can be saved with repointing or a new crown. Others can't. When the brick is spalling through multiple courses, the mortar is gone deeper than the surface, the stack is leaning, or previous patch jobs are failing one after another — the honest fix is a rebuild. We take the damaged masonry down to where it's solid and build it back up properly.
A rebuild is the biggest chimney job there is, and it's the one where shortcuts cost the most. Done right, a rebuilt chimney lasts 50 years or more. Done wrong, you're paying for it twice. Here's how we do it.
Partial vs. Full Rebuild
Partial rebuild: We take the chimney down to the roofline or to the last solid course — wherever the masonry is still sound — and rebuild from there up. This is the right call when the damage is concentrated above the roof, which is common: the part of the chimney above the roofline takes the worst weather and fails first, while the part inside the house or below the roof is often fine.
Full rebuild: We take the whole stack down to the foundation or firebox and rebuild it entirely. This is needed when damage runs deep — leaning stacks, widespread mortar failure through the full height, or fire damage. It's a bigger job, but it gives you a chimney that's new from the ground up.
During the inspection we probe the mortar at several heights to find where solid masonry starts. That line determines whether partial or full is the right call — and we'll show you what we found, not just tell you.
What a Proper Rebuild Includes
- Matching brick. We source brick that matches your home's existing masonry in size, color, and texture. A rebuild shouldn't look like a patch — it should look like it was always there.
- The right mortar. Old chimneys were built with soft lime mortar; new work often calls for a modern mix. Using mortar that's harder than the brick causes the brick faces to pop off (spalling). We match the mortar to the brick, not just grab whatever's on the truck.
- A new crown. Every rebuild gets a proper concrete crown — sloped to shed water, with a drip edge that keeps water off the brick face. Most old crowns are flat slabs of mortar that crack within years. We pour real crowns.
- A new cap. A stainless steel cap keeps rain, animals, and debris out of the flue. It's cheap insurance on top of an expensive rebuild.
- New flashing. Where the rebuilt chimney meets the roof, we install new step flashing and counterflashing in metal — not caulk, not roofing tar. This is where most chimney leaks start, and it's the detail most often done wrong.
How Long It Takes
A partial rebuild (from the roofline up) typically takes two to four days. A full rebuild takes a week or more depending on height and complexity. Weather matters — mortar needs reasonable temperatures to cure, so we schedule rebuilds in suitable conditions and protect fresh work if weather turns.
Rebuild vs. Repair: The Honest Math
A rebuild costs more than repointing — but repointing a chimney that's structurally failing is money thrown away. If the brick itself is deteriorating, new mortar joints won't save it. Our repair vs. rebuild guide walks through how we make the call, and we'll give you a straight answer at your inspection: if a repair will hold, we'll say so.
Send the form with photos of your chimney — especially close-ups of the worst areas — and we'll schedule an inspection.