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 $450-$3,200 depending on scope, and most projects are quoted and scheduled within 48 hours of your call. Our crews serve Lexington from our Boston office, carrying NFPA 211 Level 2 camera equipment and the Haven Standard documentation kit on every truck. We know the difference between a 1950s ranch flue and a 1790s colonial stack, and we won’t start any repair until we’ve shown you exactly what the camera found. Call (781) 649-9326 for a written estimate before any work begins.
Why Level Two Chimney Waltham Is Lexington’s Preferred Chimney Repair Company
We’ve completed more than 38,000 chimney inspections and cleanings since 2009, and a significant share of those have been in Lexington’s historic core and its postwar neighborhoods. Lexington homeowners leave detailed reviews - they mention the photo record, the written price, the named technician who texted before arriving. Our 365-Day Done Right Promise means if the repair doesn’t hold, we make it right without a new invoice.
Dispatch from our Boston office puts us on Lexington roads quickly. We know Massachusetts Avenue traffic patterns, the narrow driveways near the Battle Green, and the access challenges of homes built before garages were standard. That local familiarity saves time on every job.
What separates us in Lexington specifically is historic masonry fluency. Most chimney companies in the region work primarily on 1970s-and-newer construction. Our crews train on lime-mortar repointing, multi-flue smoke testing, and unlined colonial stack repair because Lexington’s housing stock demands it. Clause 4 of the Haven Standard requires a documented photo record on every job - so you see what we see, not just what we say.
Our Chimney Repair Services in Lexington
Mortar Repointing
Lexington’s oldest chimneys were laid with lime mortar, not the Portland cement used in modern construction. Lime breathes; Portland doesn’t. When a 1790s stack near the Battle Green gets repointed with hard cement, moisture gets trapped inside. Lexington’s inland freeze-thaw cycles - more severe than coastal towns - pop the brick faces within a few winters. We source appropriate lime mortar through our Haven buying network and match the original composition. A typical mortar repointing job on a Lexington colonial runs $850-$1,800.
Spalling Brick Repair
Spalling - the flaking and crumbling of brick faces - is what we diagnose most often on Lexington chimneys each spring. The damage starts with water intrusion through a cracked crown or missing cap, then accelerates when overnight freezes expand the trapped moisture. On colonial-era homes along Massachusetts Avenue, we’ve replaced entire courses of spalled brick above the roofline where the crown had failed decades earlier. Spalling repair in Lexington typically ranges from $650 for localized patching to $2,400 for extensive rebuild of a chimney face.
Chimney Waterproofing
Lexington’s position 11 miles northwest of Boston strips away the ocean’s temperature moderation. Winter lows drop harder here, and the freeze-thaw cycle repeats more aggressively than in coastal towns. Waterproofing a Lexington chimney with breathable silane-based sealant - we use materials from Olympia Chimney and Copperfield - adds a decade or more of protection to sound masonry. A standard waterproofing treatment runs $400-$700 and includes crown sealing and cap inspection.
Flashing Repair
Step flashing and counterflashing around chimney-to-roof intersections fail predictably in Lexington’s snow-loading winters. Ice dam backup works under lifted flashing, rotting roof decking and staining ceilings before the chimney itself shows damage. We replace flashing with copper or stainless stock from Famco, sealed with high-temperature compounds rated for the thermal expansion these joints experience. Flashing repair in Lexington typically costs $350-$900 depending on roof pitch and accessibility.
Chimney Rebuilding
Some Lexington chimneys are beyond spot repair. We’ve rebuilt chimney stacks above the roofline on homes near Hancock Church where decades of deferred maintenance left the structure unsafe for use. Rebuilding preserves the original footprint and flue configuration while replacing deteriorated masonry with matched brick and proper liners. A partial rebuild in Lexington runs $2,200-$4,500; full rebuilds above the roofline range $4,000-$7,500. Every rebuild quote includes a written scope, material spec, and warranty under the Haven Standard.
Tuckpointing
Tuckpointing in Lexington requires the same mortar sensitivity as full repointing - especially on historic homes where the aesthetic match matters to preservation standards. We grind out failed joints to proper depth, repoint with composition-matched mortar, and tool to period-appropriate profiles. Tuckpointing costs in Lexington range $12-$22 per square foot of joint surface, with most historic chimneys falling between $1,200 and $2,800.
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.
Before
AfterTrusted Brands We Service in Lexington
We stock repair materials from Olympia Chimney, Famco, and Copperfield through Haven’s buying network, which keeps our Lexington pricing honest and our turnaround fast. When a Massachusetts Avenue colonial needs a custom cap or a DuraFlex liner component, we’re not ordering blind from a catalog - we’re pulling from inventory or procuring through established supply relationships. That means your repair starts sooner and finishes with components rated for the specific flue gas temperatures and draft conditions your system produces.
Common Chimney Repair Problems We See in Lexington Homes
- Portland cement repointing on lime-mortar stacks. A previous owner or inexperienced mason used modern mortar on a 1790s chimney. The brick faces are now spalling in concentric patterns because trapped moisture has nowhere to escape during Lexington’s hard freezes.
- Collapsed clay-tile liners in unmapped multi-flue chimneys. Homes near the Battle Green frequently contain four flues in one mass. When one liner collapses, smoke migrates through gaps into adjacent flues. We find bedroom fireplaces that smell of parlor fires, or worse, carbon monoxide migration into dormant flues.
- Orphaned oil-furnace flues left uncapped after gas conversion. Lexington’s 1950s-60s ranches and split-levels often have a second flue that served an oil furnace. After conversion to gas, these flues get forgotten. We routinely find second-degree creosote buildup, animal nesting, and deteriorated metal during Level 2 inspections - hazards the homeowner didn’t know existed.
- Cracked crowns letting freeze-thaw water into unlined flues. Lexington’s temperature swings are severe. Water enters through hairline crown cracks, freezes overnight, and expands the crack wider each cycle. Spalled mortar and brick fragments rain down onto dampers and fireboxes, sometimes blocking the flue entirely.
Pricing for Chimney Repair in Lexington, MA
| Service | Typical Range in Lexington |
|---|---|
| Mortar repointing (lime or Portland) | $850 - $1,800 |
| Spalling brick repair (localized) | $650 - $2,400 |
| Chimney waterproofing | $400 - $700 |
| Flashing repair | $350 - $900 |
| Chimney rebuilding (partial above roofline) | $2,200 - $4,500 |
| Chimney rebuilding (full above roofline) | $4,000 - $7,500 |
| Tuckpointing | $1,200 - $2,800 |
| HeatShield cast-in-place liner repair | $1,800 - $3,200 |
These ranges reflect Lexington’s specific conditions: older masonry requiring specialized materials, multi-flue configurations adding diagnostic time, and the freeze-thaw severity that drives more extensive damage than coastal markets. What you pay depends on what the camera shows, not what a salesperson guesses from the driveway. We deliver a written price, written scope, and written warranty before any work starts - Haven Standard Clause 1. Estimates are free. Call (781) 649-9326 to schedule.
We Also Serve Cities Near Lexington
Our Chimney Repair crews work throughout the inner Boston suburbs, including Lexington, Woburn, Winchester, Burlington, and Waltham. The same NFPA 211 Level 2 inspection standard, the same documented photo record, and the same written-price-first protocol apply in every town we serve.
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
We start with smoke-testing and flue mapping before touching any masonry or brush. On a Massachusetts Avenue colonial a few blocks from the Battle Green, we opened up a stack where the parlor fireplace had been dumping smoke into the upstairs bedroom flue - smoke-testing mapped four flues off a single chimney mass, and the culprit was a collapsed clay-tile liner section above the smoke chamber. We relined that flue with a HeatShield-cast liner, repointed the lime mortar joints at the crown line, and the draft corrected on the first burn. Without flue mapping, we’d have been guessing. Call (781) 649-9326 for an exact quote - estimates are free.
Because Portland cement traps moisture in lime-mortar construction, and Lexington’s freeze-thaw cycles will destroy the brick within a few winters. Lime mortar, used in Lexington’s 1700s-early-1800s chimneys, is porous and flexible. It lets the chimney breathe and accommodates the slight settling these old structures have already experienced. We match original mortar composition through lab analysis when necessary, and we source appropriate lime mortar through our Haven buying network. Hard mortar on soft brick is a predictable failure - we won’t do it. Call (781) 649-9326 for an exact quote - estimates are free.
Yes. Clause 4 of the Haven Standard requires a documented photo record on every job, and in Lexington’s multi-flue colonial chimneys, the camera reveals what no flashlight inspection can. We’ve found collapsed liner sections hidden above smoke chambers, gaps between clay tiles venting into adjacent flues, and unlined brick flues that appeared sound from the firebox but were eroded to half their original thickness above the damper. You see the footage. We write the scope based on what the camera recorded, not what we think might be up there. Call (781) 649-9326 for an exact quote - estimates are free.
Lexington’s inland location produces harder freezes and more rapid temperature swings than coastal Massachusetts towns. Water enters through crown cracks, deteriorated mortar joints, or missing caps. When temperatures drop overnight, that water expands by about 9% as it freezes. Repeat that cycle dozens of times per winter, and the masonry surface spalls off in layers. The damage is always worse on unlined or poorly lined flues where condensation adds more moisture to the freeze-thaw equation. Waterproofing and proper crown maintenance prevent it; once spalling starts, repair is the only option. Call (781) 649-9326 for an exact quote - estimates are free.
Yes - especially in Lexington’s older housing stock. An unused flue still faces freeze-thaw exposure, and an abandoned oil-furnace flue can accumulate creosote from atmospheric condensation or become a nesting site. Our Level 2 inspection finds problems before they become emergencies: deteriorated liners that could vent carbon monoxide into wall cavities, crown cracks that will cost ten times more to repair after a winter of water intrusion, and uncapped flues that animals have claimed. The 365-Day Done Right Promise covers our work, but only inspection catches what time and weather are doing to your chimney when you’re not looking. Call (781) 649-9326 for an exact quote - estimates are free.
Ready to see what your chimney actually needs? Call Level Two Chimney Waltham at (781) 649-9326. We’ll schedule an NFPA 211 Level 2 inspection with full camera documentation, deliver a written price before any work starts, and back every repair with our 365-Day Done Right Promise. Free Second Opinion available on any competitor’s written estimate.
Written by Corrine Halstead, Owner at Level Two Chimney Co., serving Lexington and the greater Boston area since 2009.