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 Lexington
Chimney repair in Lexington, MA typically costs between $350 for minor mortar repointing and $4,500 for partial chimney rebuilding, with most factory-built fireplace repairs falling in the $800-$2,200 range. Our Chimney Repair team dispatches to Lexington from our Boston office, and we carry replacement parts for DuraFlex, HeatShield, and Olympia Chimney systems so most jobs finish in one visit. Call (781) 905-8338 - a live person answers, day or night.
We’ve worked on chimneys in Lexington for over 42 years. We know the 18th-century central stacks around the Battle Green, and we know the postwar garrison colonials off Waltham Street and Estabrook Road just as well. Both need attention, but for different reasons. The older chimneys show their age in crumbling lime mortar and spalled brick. The newer ones hide it behind factory-built chase covers and thin-wall metal flues that fail from the inside out. Whether you need Chimney Cap & Crown - Lexington service or liner work, we know what to look for.
Why Hearthstone Chimney Co. Is Lexington’s Preferred Chimney Repair Company
Lexington homeowners call us because we document what we find. Every inspection ends with photos you can see and a plain-English verdict. No jargon, no scare tactics, no pushing work that can wait.
Our 90-Day Done Right Promise covers every repair in writing. If it’s not right, we come back. No paperwork to dig up, no argument. That’s the Keystone Standard: Krafted right, Every time, Your home first, Standing behind it.
A live person answers our phones 24 hours a day, 7 days a week. Not voicemail, not a callback queue. When you call (781) 905-8338, you reach someone who can schedule you.
Our technicians are background-checked and uniformed. They carry professional-grade materials from Gelco, Famco, and Copperfield on every truck. Most repairs in Lexington - from repointing a historic stack to replacing a rusted chase cover on a 1970s ranch - are completed in a single visit with upfront pricing. The number on the estimate is the number on the invoice.
Our Chimney Repair Services in Lexington
Chimney Rebuilding
Some Lexington chimneys are too far gone for spot repairs. The freeze-thaw cycling here, more severe than Boston proper because we’re 11 miles inland, accelerates damage in lime-mortar stacks that were already 200 years old. When a central chimney near Lexington Center has multiple flues with compromised structural integrity, partial or full rebuilding is the only safe option. We rebuild with matching brick and historically appropriate mortar where needed, or with modern materials suited to the application. Done right, and we stand behind it.
Flashing Repair
Flashing is where your chimney meets the roof, and it’s the most common leak point we find in Lexington. The garrison colonials and ranches built during the 1950s-1970s boom often have step flashing that was never properly integrated with the roof membrane, or that’s simply corroded after sixty years. Water gets in, rots the roof deck, and stains the chase brick. We remove the old flashing, inspect the underlying structure, and install new copper or galvanized flashing with proper counterflashing. No surprises on the bill.
Chimney Waterproofing
Lexington’s pronounced freeze-thaw cycles destroy porous masonry. Water soaks into brick and mortar joints, expands when it freezes, and spalls off the face of the brick. We apply vapor-permeable waterproofing agents that let the chimney breathe while blocking liquid water. This is especially critical for the historic lime-mortar chimneys near the Battle Green, which are more absorbent than modern portland-cement construction. Waterproofing won’t fix existing damage, but it stops new damage from forming after repairs are complete.
Mortar Repointing
Repointing is the careful removal of deteriorated mortar and replacement with new mortar matched to the original in strength, color, and composition. In Lexington’s historic district, this means lime-based mortar that flexes with the old brick. In postwar neighborhoods, it means portland-cement mortar suited to harder modern brick. We grind out the bad joints to proper depth, dampen the wall, and pack new mortar by hand. It’s slow work, but it’s the only way the bond lasts.
Spalling Brick Repair
Spalling - the flaking and crumbling of brick faces - is everywhere in Lexington after hard winters. We replace spalled bricks with matching units and repoint surrounding joints. Where damage is extensive, we may recommend partial rebuilding. You’ll see photos of every damaged area before we start, and we’ll tell you plainly what can wait and what can’t.
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.
Trusted Brands We Service in Lexington
We stock parts from DuraFlex, HeatShield, Gelco, and Olympia Chimney on our trucks and at our Boston office. That matters for Lexington homeowners with factory-built fireplaces from the 1960s and 1970s, because manufacturer-specific components are frequently discontinued. When we can’t get the exact original part, we retrofit compatible universal parts or custom-fabricate replacements to maintain safe clearances. Fast turnaround. No waiting weeks for a special order that may never arrive.
Common Chimney Repair Problems We See in Lexington Homes
- Rusted-through chase covers on postwar homes. The factory-built fireplaces in Lexington’s 1950s-1970s neighborhoods came with galvanized chase covers that last 20-30 years. We’re now well past that. Water pours through the rust holes, pools behind the firebox, and rots the framing. By the time you smell mustiness, the damage is already inside the wall.
- Corroded thin-wall metal flues. Those same factory-built systems have metal flue liners that corrode from the inside out. Creosote and moisture eat the metal. By the time you see rust stains on the chase exterior, the inner liner is often compromised and requires full replacement rather than cleaning.
- Freeze-thaw spalling in historic lime-mortar chimneys. Lexington’s inland location means colder overnight lows and more freeze-thaw cycles than coastal towns. The 18th-century central chimneys around the Battle Green, built with absorbent lime mortar and no clay tile liners, suffer accelerated spalling and joint deterioration.
- Discontinued manufacturer parts. Spacers, storm collars, and termination caps from original equipment manufacturers are often obsolete. We recently serviced a 1968 garrison colonial in the Estabrook Road neighborhood where the original factory-built fireplace had a chase cover that was rusted through, allowing water to pour down the prefabricated chimney and pool behind the firebox. We located a compatible Gelco replacement cap, sealed the chase top with new flashing, and installed a HeatShield flue liner to restore safe draft - the homeowner had no idea the rusty cover was quietly destroying the entire chimney system from the inside out.
Pricing for Chimney Repair in Lexington, MA
Here is what chimney repair costs in Lexington’s market:
| Service | Typical Range |
|---|---|
| Mortar repointing (per section) | $350 - $900 |
| Spalled brick replacement (per brick) | $25 - $65 |
| Chimney waterproofing | $450 - $1,100 |
| Flashing repair / replacement | $550 - $1,400 |
| Factory-built chase cover replacement | $650 - $1,800 |
| Prefabricated flue liner replacement | $1,200 - $2,800 |
| Partial chimney rebuilding | $2,500 - $4,500 |
Factors that move the price: accessibility (steep roof, height), extent of hidden water damage, and whether discontinued parts require custom fabrication. We give you the full price before we start. Estimates are free. Call (781) 905-8338.
We Also Serve Cities Near Lexington
Our crews work throughout the area, including Lexington and neighboring Winchester, Waltham, Belmont, and Lincoln. Scheduling is coordinated from our Boston office, and we route trucks to minimize wait times for homeowners in all these communities.
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 Repair in Lexington
Yes. Factory-built fireplaces have metal flues that corrode from combustion moisture regardless of use frequency, and their chase covers and caps have a finite 20-30 year lifespan that has now expired for most Lexington postwar homes. We find rusted-through covers and compromised liners in homes that burn only a dozen fires per winter. Call (781) 905-8338 for a Level-2 camera inspection - estimates are free.
Your chase cover has likely rusted through, allowing water to enter the prefabricated chimney and pool behind the firebox, which causes the musty odor and begins rotting the surrounding framing. This is one of the most common calls we get from Lexington’s postwar neighborhoods. We replace the cap, seal the chase top with new flashing, and inspect the flue liner for corrosion. Call (781) 905-8338 - we’ll show you photos of exactly what’s happening.
Stained chase brick is often the first visible sign of an internal flue liner failure. The thin-wall metal flue in factory-built systems corrodes from the inside out; by the time stains appear on the exterior, the inner liner is frequently compromised and leaking combustion gases or moisture into the chase cavity. A standard Chimney Cleaning & Sweep - Lexington won’t catch this. We use camera inspection to see inside the flue and show you the actual condition. Call (781) 905-8338.
We stock DuraFlex and HeatShield components and can often repair or section-replace an older liner with Chimney Liner & Rebuild - Lexington service if the damage is localized. If the liner is extensively corroded or the original manufacturer part is discontinued, we retrofit compatible universal parts or custom-fabricate replacements to maintain safe clearances. We’ll show you camera footage of the damage and explain both options with exact pricing before you decide. Call (781) 905-8338.
Lexington has a uniquely bimodal housing stock: genuine 18th-century central chimneys near the Battle Green, and a dense belt of 1950s-1970s factory-built fireplaces in neighborhoods like Estabrook Road and off Waltham Street. The repair challenges are completely different. Historic stacks need lime-mortar expertise and sensitive rebuilding. Postwar factory-built systems need obsolete parts sourcing and prefabricated component knowledge. Most towns have one or the other. Lexington has both, and we’ve worked on both for over 42 years. Call (781) 905-8338.
Ready to get your Lexington chimney repaired right? Call Hearthstone Chimney Co. at (781) 905-8338. A live person will answer, day or night, and we’ll schedule your free estimate at a time that works for you. We’ll be there when we say. Photos you can see, a plain-English verdict. Done right - and we stand behind it.
Written by Russell Haines, Owner at Hearthstone Chimney Co., serving Chimney Repair in Lexington and surrounding communities since 1984.