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.
Before
After
Before
After
Before
AfterFast, Reliable Chimney Cap & Crown Across Lexington
Chimney cap and crown work in Lexington, MA typically runs $450-$1,400 for a standard cap replacement with crown repair, while custom multi-flue caps on colonial stacks run $1,200-$2,600 depending on flue count and liner condition. Most jobs are completed in a single visit, and we carry the materials Lexington’s older chimneys actually need: Copperfield multi-flue caps, high-bond crown mortar, and stainless hardware sized for antique brick dimensions. If you’re calling from the Battle Green area, Hancock Street, or out toward Bedford Street, call (980) 580-8641 and we’ll get you a written price before any work starts.
Lexington’s center-chimney colonials don’t accept off-the-shelf caps. The stacks are wider, the flues are irregular, and the crowns were poured by hand two centuries ago. We know that before we arrive. Our crews work these chimneys weekly, and we quote the job the same way every time: camera first, written price second, work third.
Why Emberly Chimney Cleaners Is Lexington’s Preferred Chimney Cap & Crown Company
Lexington homeowners call us because we show them what we found before we ask for a dollar. Every visit includes a camera-scan inspection under NFPA 211 Level 2, and every customer walks away with a documented photo record of their flues, crown, and cap condition. That’s Clause 4 of the Haven Standard, and it’s been our default since 2009, not an add-on.
Our technicians are background-checked, uniformed, and assigned by name before they arrive. You’ll get a text when they’re on the way. When the job is done, you get a written scope, a written warranty, and the photos to prove the work. If it’s not done right, the 365-Day Done Right Promise means we make it right. That’s stamped on every job we do in Lexington.
Corrine Halstead leads our cap and crown division. She’s seen more antique Lexington stacks than most sweeps see in a career, and she trains every tech to treat a 1780s chimney like evidence, not just masonry.
We also bring a Free Second Opinion on any written estimate. If another company quoted you a liner replacement you’re not sure about, bring us the paperwork. We’ll camera the flue and tell you what’s actually there, in plain terms, with photos you can see yourself.
Our Chimney Cap & Crown Services in Lexington
Lexington’s housing stock spans three centuries, and each era needs a different approach. Here’s what we handle most often in town:
Custom Cap
When a standard cap won’t fit, we fabricate to the stack’s actual dimensions. On Lexington’s pre-Revolutionary center-chimney colonials, the crown footprint can be 40 inches by 28 inches, with two, three, or four flues at odd spacing. Copperfield builds our custom caps to spec, so the metal seats correctly on the crown and each flue gets the right opening. A custom cap for a colonial stack in Lexington typically runs $1,200-$2,600 installed, depending on flue count and whether we’re sealing abandoned flues or preserving draft for active ones.
Cap Replacement
Rusted, missing, or improperly sized caps let rain, leaves, and animals into the flue. We remove the old cap, inspect the flue tile below it, and install a correctly sized stainless or copper replacement. On Cape cods and split-levels in the Peacock Farm and Munroe Hill neighborhoods, a standard single-flue replacement typically runs $450-$750 in Lexington, including the cap and labor.
Crown Repair
Lexington’s freeze-thaw cycles break down crown mortar fast. Water gets into hairline cracks, freezes, expands, and spalls the surface. We grind back deteriorated material, rebuild with a high-bond mortar mixed for New England temperature swings, and recut the drip edge so water sheds properly. Crown repair on a typical Lexington chimney runs $600-$1,200. If the damage is confined to one section, the price lands at the lower end. If the crown has eroded to exposed aggregate across the full footprint, expect the higher end.
Crown Coating
A coated crown buys time. We apply a flexible, breathable crown sealer after repairing surface cracks, which keeps water out without trapping moisture inside the masonry. It’s not a permanent fix, and we’ll tell you that plainly. For a Lexington colonial with a crown in fair-to-moderate condition, crown coating runs $350-$650 and can extend the crown’s life by five to eight years before a full rebuild is needed.
BeforeAfterTrusted Brands We Service in Lexington
We stock and install caps from Copperfield, liners from DuraFlex, and crown repair materials we trust to hold up through Middlesex County winters. Gelco and HeatShield products come through our buying network, which keeps prices honest for Lexington customers. When you call, ask which brand fits your chimney, and Corrine or a tech will tell you what’s actually in stock for your stack’s dimensions - not what’s easiest for us to carry.
Common Chimney Cap & Crown Problems We See in Lexington Homes
- Exposed aggregate on poured crowns: On 18th and 19th-century chimneys around the Battle Green and along Massachusetts Avenue, the original crown was often poured with local aggregate. Fifty or sixty winters of freeze-thaw cycling has washed away the surface mortar, and the only thing left is loose stone. That crown is done, no coating will save it, but a rebuild with modern mortar gives another 30 years.
- Open, unlined flues that were never capped: In colonial stacks, it’s common to find one active flue serving a fireplace insert and two adjacent flues that have been open to the sky for decades. We camera each one, remove the leaf litter and nesting debris, and cap only the abandoned flues while leaving the active one drafting properly.
- Caps sized for modern clay tile, not antique brick: A standard cap off the shelf rarely fits a Lexington colonial. The crown is wider, the flue spacing is irregular, and the brick is slightly out of square. We see homeowner-installed caps sitting crooked or held on with adhesive. They leak. They rust. They come off in a nor’easter.
- Multi-flue caps sealing the wrong flue: A shared cap over a colonial stack can inadvertently block a still-active flue if the previous owner assumed everything was abandoned. Smoke backs up into upper-floor rooms, and the homeowner calls us thinking the damper is stuck. We camera the full stack, document which flues are live, and re-cap accordingly.
Pricing for Chimney Cap & Crown in Lexington, MA
Here are the numbers we quote most often in Lexington, based on the stacks we actually see:
| Service | Typical Range in Lexington | What’s Included |
|---|---|---|
| Single-flue cap replacement | $450-$750 | Cap, hardware, installation, camera inspection |
| Crown repair (section) | $600-$900 | Surface prep, high-bond mortar, drip edge recut |
| Crown repair (full rebuild) | $900-$1,200 | Full tear-out, rebuild, drip edge |
| Crown coating | $350-$650 | Crack sealing, flexible coating, photo record |
| Custom multi-flue cap (colonial) | $1,200-$2,600 | Custom fabrication, installation, flue documentation |
The colonial stacks near the Battle Green and Hancock Street run higher because the work is slower and the cap has to be built to the crown’s actual footprint. A 1950s ranch over by Bowman Street runs lower because the crown is standard and the flue is round. You’ll always get a written price before work starts, with the scope in writing. Call (980) 580-8641 and we’ll schedule the camera inspection. Estimates are free.
We Also Serve Cities Near Lexington
Our Chimney Cap & Crown in Lexington crews also cover Woburn, Winchester, Burlington, and Arlington. If you’re in one of those towns and your chimney looks anything like the colonials we work on here, call (980) 580-8641 and we’ll route a tech to you the same week.
Serving Lexington, MA - Our Local Coverage Area
We’re based in the Lexington 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 Cap & Crown in Lexington
A center-chimney colonial often has three to five separate flues in one stack. A standard cap covers only one flue opening, leaving the rest exposed. On Hancock Street and around the Battle Green, these stacks are the rule, not the exception. A multi-flue custom cap from Copperfield covers the entire crown footprint and seals each unused flue individually while preserving draft on the active ones. For a quote on your specific stack, call (980) 580-8641.
You need a camera look at the crown from above. Hairline cracks can be ground out and re-mortared. Erosion down to exposed aggregate, or cracks wider than a quarter inch that run into the flue tiles, mean the crown is gone and a rebuild is the honest answer. We do that assessment with our camera and show you the photos before we quote. If you’re in Lexington, call (980) 580-8641 and we’ll get on your roof.
On a colonial stack, we don’t recommend it. The crown is often uneven, the flue spacing is irregular, and if you seal the wrong flue you can backdraft smoke into an upstairs bedroom. You’re also working at roof height on a chimney that may have loose brick or a deteriorating crown. A qualified sweep with a camera will document which flues are active and which are abandoned, then install a cap that actually fits. Call (980) 580-8641 for an estimate in Lexington. The estimate is free, and you’ll get the photos either way.
Spalling is the face of the brick popping off, and in Lexington it’s driven by freeze-thaw cycling. Water seeps into the brick’s surface during the day, freezes overnight, and the ice expansion pushes the face off. A crown coating seals surface cracks to slow water entry, but it will not stop spalling that has already started. Once brick face is popping, the damaged units need replacement or rebuilding. We’ll tell you which one your chimney needs after we see it. For an inspection in Lexington, call (980) 580-8641.
The two open flues definitely need caps. They’re collecting rain, leaves, animals, and whatever else has blown in over the years. The active insert flue may already have a cap integrated with the insert, or it may need one if the existing cap is damaged. We camera all three, document what’s there, and cap the unused flues while preserving proper draft for the insert. That exact scenario is one we see often in Lexington’s colonial stacks. For a written quote, call (980) 580-8641.
Written by Corrine Halstead, Owner at Emberly Chimney Cleaners, serving the greater Boston metro area since 2009.