Protect the masonry below a damaged chimney top. We assess whether the crown can be repaired or needs rebuilding, then price the work from its dimensions and condition.
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Serving Boston, MA
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Scope & price agreed upfront
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Roof access planned in advance
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Repairs for older Boston homes
For standard access, the published calculator uses length × width in inches, plus a $500 base for repair or a $1,500 base for rebuilding. A 36 × 36-inch crown illustrates $1,796 for repair or $2,796 for rebuilding. Condition and access must still be confirmed.
Live
chimney-crown-repair
Measurement-based repair or rebuild pricing
Inspection (credited)
−$49
Typical job
36 × 36 in. example: $1,796 repair / $2,796 rebuild
Final price quoted in writing before any work.
A chimney crown is the sloped masonry surface at the top of the stack, surrounding the flue openings. When it cracks or loses its water-shedding shape, moisture can reach the masonry below. Brown Chimney assesses Boston crowns to establish the condition of the material and the appropriate repair.
Surface defects on a sound crown may be repairable. Extensive deterioration, poor geometry or structural cracking can call for rebuilding. We explain that distinction before applying a surface treatment, because a coating does not restore a crown that has lost its structural integrity.
The assessment considers the crown's relationship to the flue openings, exposed brickwork and cap. On tall or closely spaced Boston buildings, the access method also affects the work. Measurements and the actual condition establish the scope rather than a single flat price for every chimney.
The chimney crown sheds water away from the masonry below
Preparation removes loose material and establishes a suitable surface for the specified repair system. If rebuilding is needed, the scope addresses the crown shape and water-shedding details. The proposed method should suit the chimney and follow the materials' application requirements.
We document the finished top and explain any adjacent defects, such as a damaged cap or open brick joints. A new crown does not automatically repair those components. Treating the top as part of a larger water-management system helps keep the quote clear and the repair focused.
Crown work often sits alongside cap installation, masonry rebuilding or chimney waterproofing, depending on the condition found.
Most crown details cannot be judged reliably from the ground. These symptoms are reasons to arrange an assessment, not to climb onto the roof for a closer look.
We measure the crown, assess its integrity and explain the proposed method. The written quote identifies repair or rebuilding, access and any related components before the work is approved.
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The crown is measured at its widest points on the roof. Price follows that measurement, so the number is built from your chimney rather than a rounded guess.
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Surface cracks on a structurally sound crown get patched. Structural failure gets a full rebuild — you get the honest read and both prices in writing before choosing.
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Cracks are cleaned, opened where needed, and prepped for bonding. Loose material comes off so the patch keys into sound concrete instead of sitting on debris.
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Crown coat sealant is applied across the full surface, and the drip edge is repaired or rebuilt to a one-inch minimum overhang — no exceptions. That overhang is what throws water clear of the brick below.
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The finished crown is photographed from the roof and added to your report, with the 1-year workmanship warranty on all labor performed in writing.
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Our first chimney cleaning for our wood stove and could not have asked for a better, swifter and quality experience. Many thanks to the Brown Chimney team.
Trevor Samios
Illustrative calculator prices depend on dimensions and standard access; the actual crown needs assessment.
A surface repair is not the same scope as removing and rebuilding a failed crown.
Caps, flue repairs, brickwork and roof flashing are separate items unless explicitly included.
Call Brown Chimney at 781-547-7784 or book a Boston crown assessment. We will measure the top, explain its condition and provide a repair or rebuild scope.