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.
Fast, Reliable Fireplace Services Across Lexington
Fireplace service in Lexington, MA typically runs $180-$650 depending on whether you need a basic sweep, firebox repair, or insert installation, and most appointments are completed in a single visit. If you live in one of the historic colonials near the Battle Green or a postwar garrison out toward Lincoln, the condition of your chimney and fireplace demands a sweep who understands the difference. Our Fireplace Services team has worked on both - massive central stacks serving four fireplaces from one flue, and single-flue systems from the 1960s with their own aging issues. Dispatch and scheduling are coordinated from our Boston office, but our crews are in Lexington every week. Call (781) 905-8338 to book a free estimate.
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.
Why Hearthstone Chimney Co. Is Lexington’s Preferred Fireplace Services Company
We’ve been answering the phone with a live person for over 42 years, and that hasn’t changed. Lexington homeowners call us because we’ve swept chimneys on Massachusetts Avenue, along Marrett Road, and in the neighborhoods bordering the Minute Man National Historical Park. They know our technicians are background-checked and uniformed, that we show up when we say we will, and that we document every inspection with photos and a plain-English verdict.
Our 90-Day Done Right Promise is in writing with no arguing. If it’s not right, we come back. No paperwork shuffle, no runaround. That’s the Keystone Standard we’ve operated under since 1984.
Calls are answered by a live person 24 hours a day, 7 days a week. Not voicemail. Not a callback queue. A real person.
Our Fireplace Services in Lexington
Wood Burning Fireplace Service
Lexington’s older homes weren’t built for modern heating loads, and many residents still burn wood as primary heat through January and February. That means heavier creosote loading and a shorter safe sweeping interval than the standard NFPA 211 recommendation. We recently serviced a c.1760 colonial off Massachusetts Avenue near the Battle Green where the shared central stack fed four fireplaces. Our tech found the wood stove flue on the ground floor had heavy flaking first-degree creosote and a firebox with crumbling lime mortar joints; the homeowner was burning unseasoned oak as a primary heat source. We swept the flue, repaired the firebox with HeatShield, and walked the owner through seasoned-wood burning to cut future buildup. In writing, no arguing - that’s our promise.

Gas Fireplace Service
Gas fireplaces in Lexington’s 1950s-1970s garrison colonials and ranches need annual inspection too. The venting systems on these units can deteriorate, and the ceramic logs and burners require cleaning to maintain efficiency. We service all major brands and carry replacement parts from Olympia Chimney and Famco to minimize return visits. Most gas fireplace tune-ups are completed in a single visit with no-hassle upfront pricing.

Fireplace Insert Installation & Service
Wood stove inserts are popular in Lexington’s drafty historic homes, but they’re often installed into flues never designed for the concentrated heat output. An insert in an unlined central chimney - common near Lexington Center - creates a thermal stress point where the flue meets the smoke chamber. We inspect the full run with a Level-2 camera before any insert work, and we install liners from DuraFlex when the existing flue won’t safely handle the load. Photos you can see, a plain-English verdict.

Damper Repair & Firebox Repair
Dampers in Lexington’s older homes are often original cast-iron throat dampers frozen solid from decades of rust and creosote buildup. Fireboxes built with lime-based mortar - standard in pre-Revolutionary construction - erode faster than modern refractory materials, especially when subjected to the thermal cycling of a wood stove. We repair fireboxes with HeatShield refractory coating and replace failed dampers with new assemblies from Copperfield. Done right, and we stand behind it.

Trusted Brands We Service in Lexington
We don’t use builder-grade substitutes. Our trucks carry professional-grade materials from Gelco, Olympia Chimney, Famco, and Copperfield - brands that hold up in Lexington’s freeze-thaw climate. That means faster turnaround for Lexington customers because we’re not ordering parts after the fact. The number on the estimate is the number on the invoice.
Common Fireplace Services Problems We See in Lexington Homes
- Assuming a good draft means a safe flue. In Lexington’s unlined lime-mortar stacks - especially the central chimneys in historic colonials - combustion gases can seep through hairline joint cracks directly into wall cavities. A chimney that “draws fine” can still be dangerous. Only a Level-2 camera inspection reveals what’s happening inside the masonry.
- Burning unseasoned or green wood as primary heat. Rural Lexington properties and homes off the gas main often rely on wood stoves through deep winter. Unseasoned oak loads the flue with first-degree creosote far faster than dry hardwood, turning a year’s safe interval into a hazard in a single season.
- Neglecting annual inspection on multi-flue central chimneys. One stack serving three or four fireplaces means three or four times the thermal stress on shared masonry. Freeze-thaw cycling - more pronounced here than in Boston proper, sitting 11 miles inland - widens hidden mortar gaps between flues. Annual camera inspection catches what a visual sweep cannot.
- Deferring firebox and damper maintenance in postwar homes. The 1950s-1970s garrison colonials and ranches in Lexington’s outer neighborhoods were built with thin-wall masonry and prefab components now reaching end of life. Cracked refractory panels and rusted-out throat dampers are common; we replace both with materials built to outlast the originals.
Pricing for Fireplace Services in Lexington, MA
A typical wood-burning fireplace sweep and inspection in Lexington runs $180-$280. Gas fireplace service and tune-up: $150-$220. Firebox repair with HeatShield refractory coating: $450-$850 depending on damage extent. Damper replacement: $350-$650. Fireplace insert installation with liner: $2,800-$4,500. These are Lexington-specific ranges based on the labor and materials required for the housing stock we encounter here - from massive central chimneys to single-flue postwar systems.
What moves the number: accessibility of the flue, whether the chimney is lined or unlined, extent of creosote buildup, and whether repair work is needed beyond the sweep. We agree on a flat price before booking. No surprises on the bill. Call (781) 905-8338 for an exact quote - estimates are free.
We Also Serve Cities Near Lexington
Our crews work throughout the area surrounding Lexington, including Lexington itself plus Winchester, Waltham, Belmont, and Lincoln. The same live-answer phone, same documented inspection, same 90-Day Done Right Promise applies whether you’re off Massachusetts Avenue or out toward the Lincoln town line.
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 - Fireplace Services in Lexington
Once per year is the minimum for any wood-burning system, but in Lexington we recommend every cord of wood burned or annually, whichever comes first. Homes burning as primary heat - common in rural Lexington properties and drafty historic colonials - often need mid-season inspection because creosote loads faster than the standard NFPA 211 interval assumes. Call (781) 905-8338 to schedule - estimates are free.

The risk is combustion gases leaking through deteriorated lime-mortar joints into wall cavities, even when the chimney appears to draw properly. Many pre-Revolutionary and early Federal-era homes in this area have massive central stacks serving multiple fireplaces with no clay tile liner - just coursed brick. Hairline cracks from 250 years of thermal cycling aren’t visible from the firebox. Our Level-2 camera inspection finds them. Call (781) 905-8338 for a documented assessment.

Yes, and we inspect the full flue liner and connection before sweeping. Garrison colonials in Lexington’s postwar belt often have single-flue chimneys with thin-wall masonry or early stainless liners not rated for modern insert temperatures. We verify the system is safe for the insert’s output, sweep the flue, and photograph everything for your records. Call (781) 905-8338 to book.

A smoky fireplace, visible creosote flakes in the firebox, or a persistent cold draft when the damper is closed. But the first sign we worry about in Lexington is the one you can’t see: hidden mortar deterioration in unlined central chimneys, accelerated by our pronounced freeze-thaw cycling. Annual inspection catches what symptoms miss. Call (781) 905-8338 to schedule before burning season.

Yes. We repair fireboxes with HeatShield refractory coating and replace failed throat dampers with new assemblies - common needs in both the historic colonials near Lexington Center and the aging postwar housing stock. Most repairs are completed in a single visit with no-hassle upfront pricing. Call (781) 905-8338 for an exact quote.
Written by Russell Haines, Owner at Hearthstone Chimney Co., serving Lexington and surrounding communities since 1984.






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