Chimney Repair in Lexington, MA - Same-Day Service, Done Right the First Time

Fast, Reliable Chimney Repair Across Lexington

Chimney repair in Lexington, Massachusetts typically runs $350-$2,800 depending on whether you need mortar repointing, brick replacement, or a partial rebuild, and most jobs are completed in a single visit. If you’re seeing crumbling mortar, water stains on your ceiling near the chimney, or bricks that flake when you touch them, the freeze-thaw cycles that hit Lexington every winter are likely the cause. We’ve been driving to Lexington since 1984 - usually within 45 minutes from our dispatch - and we’ve worked on chimneys from the colonial-era homes ringing the Battle Green to the 1950s capes off Marrett Road. Call (844) 803-1545 anytime; a live person answers, day or night.

Call (844) 803-1545

Why Hearthstone Chimney Co. Is Lexington’s Preferred Chimney Repair Company

Lexington homeowners tend to stay put. The median home age here is among the oldest in Middlesex County, and when you’ve owned the same house for thirty years, you remember which contractors showed up on time and which ones didn’t. We’ve earned that memory in Lexington through steady work: our technicians are background-checked and uniformed, they document every inspection with photos you’ll see yourself, and they explain the verdict in plain English before any work begins.

Our reviews from Lexington customers mention the same things repeatedly - that we arrived when we said we would, that the price on the estimate matched the invoice, and that we came back once to adjust a crown seal without argument or paperwork. That’s the 90-Day Done Right Promise in action. If it’s not right, we make it right, backed in writing. No exceptions.

Response time to Lexington is typically same-day or next-day for standard repairs, and we carry the materials to complete most jobs in one visit. We know the difference between a 1740s fieldstone chimney on Hancock Street and a 1962 brick chase off Waltham Street, and we know that each requires a different approach. That local knowledge prevents misdiagnoses that cost homeowners thousands.

We’ve also learned Lexington’s permitting rhythm. The Building Department on Massachusetts Avenue inspects Chimney Liner & Rebuild - Lexington projects, and we handle the paperwork so you don’t have to chase signatures. That’s part of the job, and we don’t charge extra for it.

Our Chimney Repair Services in Lexington

Mortar Repointing

The mortar joints in Lexington chimneys take a beating. Eastern Massachusetts crosses the freezing threshold dozens of times each winter, and water that seeps into hairline cracks expands and contracts until the mortar turns to sand. On pre-1800 homes near the Battle Green, we’ve found original lime mortar that has lasted nearly three centuries but now needs sympathetic replacement with historically appropriate materials. For post-war homes in the 02421 ZIP code, the issue is usually Portland cement mortar from the 1950s that was too rigid for the brick and has cracked away. Repointing a typical Lexington chimney runs $850-$1,400, and we match the mortar composition to the era of the house.

Spalling Brick Repair

Spalling - bricks that flake, pop, or crumble - is everywhere in Lexington, especially on chimneys shaded by the town’s mature oak and maple canopy. Moisture lingers longer on these north-facing or tree-covered stacks, and when it freezes, the face of the brick shears off. We’ve replaced spalled bricks on colonial-era chimneys where the original bricks were handmade and irregular, requiring us to source matching reclaimed material or carefully cut modern brick to fit. On 1960s colonials near Arlington’s border, the bricks are standard modular and we carry replacements in our trucks. A localized spalling repair in Lexington typically costs $450-$950; extensive face replacement on a tall stack can reach $1,800.

Chimney Waterproofing

Lexington’s tree canopy and older masonry make waterproofing one of our most requested services. We apply professional-grade breathable sealers - never the hardware-store coatings that trap moisture inside - that allow vapor to escape while blocking liquid water. This matters particularly on chimneys that have never been lined or that serve multiple flues from a central stack, a configuration we see regularly in the historic core. Waterproofing a standard Lexington chimney runs $650-$1,100 depending on accessibility and whether we need to install counter-flashing or repair the crown first.

Flashing Repair

The junction where your chimney meets the roof is the most common leak point we find in Lexington, and it’s often misdiagnosed as a roof problem. On older homes with cedar or slate roofs near the town center, the original flashing may be lead or copper that has fatigued at the bends. On post-war homes with asphalt shingles, the issue is usually galvanized step flashing that has rusted or pulled away. We fabricate custom flashing on-site when needed and seal with professional-grade compounds. Flashing repair in Lexington typically runs $400-$850, and we guarantee it won’t leak through the next winter.

For more extensive structural work, our Chimney Repair team also handles partial and full chimney rebuilding, tuckpointing on historic structures, and liner replacement when the flue itself has failed.

Trusted Brands We Service in Lexington

We don’t use builder-grade substitutes. For Chimney Cleaning & Sweep in Lexington and relining, we specify DuraFlex stainless steel liners and HeatShield cerfractory flue sealant, depending on whether the chimney needs structural reinforcement or surface restoration. For caps, crowns, and exterior waterproofing, we source from Gelco and Copperfield - materials that hold up to Lexington’s freeze-thaw aggression. We keep common sizes in stock, which means most Lexington repairs don’t wait on shipping. When a technician arrives with the right part already on the truck, the job finishes that day and you pay only what we quoted.

Common Chimney Repair Problems We See in Lexington Homes

• Freeze-thaw mortar destruction on unlined colonial stacks. The oldest chimneys near the Battle Green were built before clay flue liners existed, and their mortar joints are directly exposed to combustion moisture and weather. We regularly find central stacks where the interior mortar has eroded to the point that flue gases leak between adjacent fireplaces.
• Clay tile liner collapse in 1950s-1960s capes and colonials. The post-war housing ring in ZIP 02421 is hitting the 60-70 year mark, and the original clay flue tiles are cracking from thermal shock and freeze expansion. A collapsed liner section can block the flue or allow creosote to accumulate in the chimney walls.
• Multi-flue misidentification in pre-Revolutionary homes. On streets like Hancock Street, a single exterior chimney chase may serve three or four original fireplaces plus a modern insert. Homeowners sometimes don’t realize which flue connects to which appliance, and we’ve found gas inserts venting into unlined brick passages that once served cooking hearths. Our Level-2 camera inspection maps every flue before any repair begins.
• Crown cracks that funnel water into the stack. Lexington’s mature tree canopy keeps chimneys cool and damp longer than in more open suburbs, and concrete crowns without proper overhang or expansion joints crack within a decade. Water enters, freezes, and begins separating the crown from the brick below.

Pricing for Chimney Repair in Lexington, MA

We Also Serve Cities Near Lexington

Our repair crews work throughout Middlesex County, and we’re regularly in Lexington as well as Arlington, Bedford, Winchester, and Burlington. If you live near the town line - say, off the Arlington side of Route 2 or the Bedford side of Concord Avenue - we can usually still reach you within the same window. We also offer Fireplace Services in Lexington for damper, firebox, and gas log issues, and Chimney Cap & Crown in Lexington for protective top-sealing work that prevents the water damage we described above.

FAQs - Chimney Repair in Lexington