Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
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AfterFast, Reliable Chimney Repair Across Boston
Chimney repair in Boston, MA typically runs $450-$1,800 for the most common issues: mortar repointing, flashing repair, crown rebuilding, and flue liner work. Most jobs are quoted in writing within 24 hours of a camera-scan inspection, and many repairs schedule within a week or two, not months. Level Two Chimney Boston has worked the brick-and-mortar housing stock of Dorchester, South Boston, Roxbury, Jamaica Plain, Back Bay, and the South End since 2009. We are not a general contractor with a chimney side business; we only do chimneys. Call us at (857) 567-8887 and a live person answers, day or night.
Why Level Two Chimney Boston Is Boston’s Preferred Chimney Repair Company
38,000 chimney inspections and cleanings carried out since our founding in 2009, every one of them with a written price delivered before work started and a documented photo record when it was done. Boston homeowners tend to research before they call. We know that. Which is why our quotes name a dollar figure, not a placeholder. Which is why every visit includes a camera down the flue, with the images yours to keep. A written scope, a written price, and a written warranty arrive before our tech ever picks up a trowel. That is Clause 1 of the Haven Standard, and we built the company on it.
Our crews know Boston’s triple-decker stacks, South End brownstone rooflines, and the salt air on the harbor side of the city. Corrine Halstead leads the Boston operation with the same standard applied on every block: evidence before opinion, price before work. The customer walking away with a photo record is not “upgraded service.” It is Clause 4 of the Haven Standard, and it has been continuous since 2009. You do not get a flashlight look from us. You get a camera-scan report you can hold.
And when a competitor hands you a written estimate for repointing or a crown rebuild, bring it. Our Free Second Opinion on any written estimate is available to anyone in Boston, no strings. If the work does not hold up, the 365-Day Done Right Promise applies: if it is not done right, we make it right. Stamped on every job.
Our Chimney Repair Services in Boston
Mortar Repointing
Older Boston chimneys were built with lime mortar, which flexes slightly as the brick moves through freeze-thaw cycles. Modern Portland cement repairs may actually accelerate brick spalling because they are harder than the surrounding masonry. We match the original lime-mortar composition so the joint breathes with the chimney. In neighborhoods like Dorchester and Roxbury, where chimneys date to the 1890s-1920s, a standard repointing job in Boston runs $45-$75 per square foot depending on height above the roofline and access. If you are seeing crumbling mortar dust at the base of the chimney or along the crown, that is the first sign.
Spalling Brick Repair
Spalling is what happens when water gets into the brick face and freezes, popping the outer layer off like a cap. Boston averages roughly 43 inches of snow and cycles above and below freezing dozens of times a winter. That is a spalling machine. We replace spalled brick with matching material where possible, and on 19th-century brownstones in the Back Bay and South End we document condition with photos before and after. Spalled brick left alone lets water into the chimney core. A typical spalling repair in Boston runs $600-$1,400 including brick replacement and joint work, with the written quote referencing exactly how many brick are being replaced and why.
Chimney Waterproofing
Atlantic salt air adds another layer of erosion in East Boston, South Boston, and Charlestown. Salt crystals expand inside masonry pores, working alongside freeze-thaw to loosen brick surfaces faster than you would see 30 miles inland. We apply breathable siloxane-based waterproofing that repels liquid water while letting water vapor escape. This is not paint. It does not trap moisture. A full chimney waterproofing on a standard Boston two-story runs $600-$1,200 depending on surface area and the number of stories requiring staging. The right time to waterproof is after repointing or crown work, never before.
Flashing Repair
Flashing is the metal work at the roofline where chimney meets roof, and it fails quietly. Leaks show up on the ceiling below the chimney or as damp spots on the chimney breast inside. In Boston’s tight alleys and attached row houses, access to one side of the chimney often means working from a neighbor’s roof or a narrow staging setup. We are used to it. Flashing repair in Boston typically runs $350-$900, but if the roofline pitch or the shared wall complicates access, the written quote reflects that before we start. There is no surprise at the end because the price was never hidden at the start.
Chimney Rebuilding
When the roofline stack has leaned, cracked, or lost structural integrity, partial or full rebuilding is the answer. In Back Bay and South End brownstone rows, where the land under the buildings is filled tidal ground, decades of differential settlement push chimneys out of plumb. A lean of even 2-3 degrees over 40 feet is enough to open cracks at the roofline. We rebuild from the roofline up or from the crown down, depending on condition, and document everything. Chimney rebuilding in Boston starts around $1,800 for a modest roofline stack and goes up with height, brick match, and staging requirements. Every rebuild starts with a written scope that says exactly what bricks get removed, what liner changes, and what the finished stack will look like.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Boston
We install and service materials from HeatShield, Gelco, and Olympia Chimney, procured through Haven’s buying network to keep customer pricing honest. Gelco flexible flue liners are a common choice for triple-decker retrofit work where each floor’s flue needs isolation. HeatShield cerfractory sealant lets us repair clay-tile liners without a full teardown in some older Boston homes. Olympia Chimney caps and crowns replace rusted steel or failed masonry in the salt air of South Boston and East Boston. Parts for these systems stock locally, so the most common repair jobs do not wait on a backorder.
Common Chimney Repair Problems We See in Boston Homes
- Shared flues in triple-deckers: In Dorchester, Roxbury, South Boston, and Jamaica Plain, a single unlined chimney stack often serves wood-burning fireplaces on all three floors. When each tenant assumes someone else scheduled the cleaning, years pass and glazed third-degree creosote builds up, which no standard brushing removes. That is a three-floor liability event for one landlord.
- Back Bay and South End brownstone settlement: Filled tidal land settles unevenly over decades, and chimneys at the roofline show it first with leaning stacks, cracked crowns, and separated flashing. A routine cleaning on these blocks often becomes a structural evaluation.
- Salt air in harbor neighborhoods: East Boston, South Boston, and Charlestown see faster mortar erosion than inland Boston because Atlantic salt continues the degradation even in summer. Spalling brick and open joints are the visible result.
- Oversized flues from fuel conversions: Most Boston chimneys were built for coal, then converted to oil, then to gas. The flue interior is now far too large for a modern high-efficiency appliance, which cools exhaust gases and accelerates creosote condensation. In attached properties, that oversized flue may share a wall with the neighboring unit’s flue, compounding the issue.
Pricing for Chimney Repair in Boston, MA
Here is the straight truth about what Boston chimney repair costs. Mortar repointing runs $45-$75 per square foot. Spalling brick repair runs $600-$1,400. Flashing repair runs $350-$900. Chimney waterproofing runs $600-$1,200. Crown rebuilding runs $400-$800. Full or partial chimney rebuilding starts around $1,800 and goes up with roofline height and access. A flue liner install in an older Boston triple-decker runs $1,200-$2,600 depending on length and whether we use Gelco flexible liner or a HeatShield resurfacing approach. The written price you get never changes after the fact. Call (857) 567-8887 for an exact quote, free of charge.
We Also Serve Cities Near Boston
Our crews cover Boston neighborhoods daily, plus the close-in suburbs. Cambridge and Somerville masonry rows, Newton and Milton old frame-and-brick colonials, Winchester and its early 20th-century fireplace stock. One office, one standard, all of it backed by the Haven Standard photo record and written price. If your chimney is anywhere in the metro core, our Chimney Repair team can reach it.
Serving Boston, MA - Our Local Coverage Area
We’re based in the Boston area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Chimney Repair in Boston
In a Boston triple-decker where one masonry stack carries flues for all three floors, the repair responsibility belongs to the property owner, not any individual tenant. But the risk is split across every floor at once. A cracked flue liner on the third floor’s fireplace can spill carbon monoxide into second-floor units, and a creosote fire in the shared stack endangers all three households. Massachusetts fire code under 527 CMR requires the owner to maintain the flue, but tenants who burn wood should know the condition of the stack they are venting into. If you own a Boston triple-decker and have not had a camera-scan inspection of the shared stack within the last 12 months, call (857) 567-8887 for a written assessment. Estimates are free.
Yes. In Boston row houses and attached triple-deckers, adjacent flues sometimes share a chimney mass, and a neighbor’s gas appliance venting into a deteriorated shared stack can push exhaust into your unit through cracked flue liners or open mortar joints. We have documented this cross-contamination pattern in South Boston and Dorchester more times than we can count. The fix is usually a flue inspection with a camera, followed by an isolation liner if the shared stack is compromised. The situation is not your neighbor’s fault; it is the stack’s age and condition. Call us for a documented camera scan and we will show you what is actually moving through the flue.
Back Bay and South End were built on filled tidal land, and the fill compresses unevenly over a century, settling at different rates under different buildings and even different corners of the same building. That differential settlement pushes chimney stacks out of plumb, and the stress concentrates at the roofline, where the freestanding stack meets the structural frame. The result is leaning chimneys, cracked crowns, and flashing that separates. Our crews have rebuilt stacks on Marlborough and Beacon Street where the chimney had moved three inches out of level over 80 years. The inspection always includes documenting the lean in the photo report. Then we quote the rebuild in writing.
Every year, before burning season. The National Fire Protection Association (NFPA 211) calls for an annual inspection of any chimney in regular use, and a shared triple-decker stack with three fireplaces is not a regular-use chimney; it is a high-duty one. The failure mode in Boston is well documented: each floor assumes another floor scheduled the cleaning, nobody did, and the glazed creosote sits there until it either ignites or gets chemically treated. We find three years of accumulated creosote on the first visit to many Dorchester stacks. A camera-scan inspection costs less than a single day of lost rent during a fire evacuation. Call (857) 567-8887 and we will have a named tech out to your triple-decker with a written inspection report.
Yes, and the damage is measurable, not anecdotal. Atlantic salt crystals penetrate masonry pores and expand as they re-crystallize, which works the same way freeze-thaw does but runs all year, not just in winter. Chimneys in South Boston and Charlestown taken down for rebuilding routinely show eroded lime mortar and softened brick faces after 25-30 years, where an otherwise identical chimney 30 miles inland will often pass inspection. The fix is a breathable siloxane waterproofing after repair. But waterproofing over already-damaged mortar traps the problem inside. The sequence matters: repoint, rebuild what needs rebuilding, then waterproof. We spell that out in the written scope every time.
Call Level Two Chimney Boston for Chimney Repair Service
We work under one rule: show you the evidence, give you the written price, and do the work right. If something is not right, the 365-Day Done Right Promise says we make it right. In a city of triple-decker shared stacks, brownstone settlement, and harbor salt air, you need a repair company that sees the full picture before quoting it. That is us. Call (857) 567-8887 for a free estimate on any chimney repair in Boston. A live person answers.
Written by Corrine Halstead, Owner at Level Two Chimney Boston, serving Boston since 2009.
Chimney Repair in Nearby Areas
