Keep direct rain and unwanted entry out of the flue with a cap selected for your chimney. We check the fit, attachment and condition of the masonry supporting it.
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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
Published single-flue installations range from $375 to $549. Custom multi-flue covers generally start around $1,500–$2,500 or more, depending on design and size. The calculator helps identify the category; measurements and roof access establish your final quote.
Live
chimney-cap-installation
Single-flue caps: $375–$549
Inspection (credited)
−$49
Typical job
Custom multi-flue: from about $1,500–$2,500+
Final price quoted in writing before any work.
Brown Chimney installs replacement and new chimney caps for Boston properties. The right choice depends on the number of flues, their dimensions, the appliance served and the condition of the crown. We measure the chimney top before deciding how the cap should be supported and secured.
A single-flue cap protects an individual termination. A custom multi-flue cover can span more of the chimney top, provided the design maintains the required exhaust clearances and access. Bigger is not automatically better; the cover must be appropriate for the system underneath it.
On a shared chimney, identify which flues remain active before changing the top arrangement. In a designated Boston historic property, a visible exterior change may also need review. Access, appearance and the functional requirements all belong in the installation discussion.
A chimney cap fitted to the flue and chimney-top dimensions
A cap fixed to loose or damaged material may not stay secure. We assess the accessible crown and top courses, explain any repair needed and specify the attachment method for the chosen cover. Screens and clearances must suit the application rather than restrict normal venting.
Once installed, the cap and its attachment are documented. We explain what it protects and what it does not: a cap can reduce direct rain entry at the flue, but deteriorated mortar, a cracked crown or failed flashing can still allow water into the chimney.
A complete water-entry plan may also involve crown repair, flashing repair or chimney waterproofing in Boston.
You may be able to spot an obvious problem from the ground. Leave roof-level assessment to the service visit, especially if the existing cover appears loose.
We measure the flue and assess the supporting top, confirm the cap design and price, then fit and document the installation. Custom fabrication and difficult access can affect scheduling.
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The flue tile is measured exactly — cap fit is everything. Multi-flue chimneys are dimensioned for a custom stainless build; single flues match standard sizing.
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While we're up there, the crown and top courses get checked. Anything worth watching goes in your photo report — cap and crown protect the same surface.
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The cap is seated, anchored, and sealed so wind can't lift it. Galvanized steel for standard single flues; stainless only for multi-flue — no exceptions.
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Wire mesh on every opening — tight enough to stop animals and embers, open enough to keep the draft unrestricted.
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The finished installation is photographed from the roof and added to your report, with the 1-year workmanship warranty 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
Crown rebuilding, brick replacement and flue repairs are separate from a standard cap installation.
Custom dimensions, special finishes and unusual roof access must be included in the written scope.
A cap addresses the chimney top; it does not resolve every source of a chimney leak.
Call Brown Chimney at 781-547-7784 or request a Boston cap installation assessment. We will confirm dimensions, access and the proposed cap before you approve the work.