Chimney Repair & Masonry in Boston, MA

Leaning stacks, crumbling joints, cracked crowns, and leaks around the flashing. We repair, repoint, and rebuild masonry chimneys across Greater Boston and Massachusetts.

4.9 ★ Rated by Local Clients

Licensed & Certified Team

15+ Years of Chimney & Masonry Experience

Chimney Masonry Repair for Boston & Massachusetts Homes

A masonry chimney sits above the roofline with nothing to protect it. Rain, snow, and wind hit it from four sides, the inside is exposed to heat and acidic flue gases, and every winter the freeze-thaw cycle pries at the mortar joints. That's why chimneys usually fail years before the rest of a brick house does, and why chimney problems tend to show up as water stains on a ceiling long before anyone notices the brick.

Kings Masonry & Construction repairs, repoints, and rebuilds masonry chimneys on single-family homes, two-families, triple-deckers, and commercial buildings throughout Boston and eastern Massachusetts. We handle the whole stack: the cap and crown on top, the brick and mortar joints, the flashing where the chimney meets the roof, and the flue liner inside.

Many of the chimneys we see in Greater Boston are 80 to 120 years old. They were built for coal or wood, often lined with clay tile or not lined at all, and have been patched more than once since. Some now vent a modern gas or oil system they were never designed for. Others haven't been used in decades but are still standing open to the weather. Each situation calls for a different repair, so we always start by finding out what's actually going on.

We go up on the roof, look at every part of the chimney, and take photos of what we find. You get a plain-language explanation and a written estimate that separates what needs to happen now from what can wait. If the chimney can be saved with chimney tuckpointing and a new crown, we'll say so. If it has moved or lost too much mortar to be repaired safely, we'll explain why a chimney rebuild is the better call.

Residential Chimneys

Repointing, crowns, caps, flashing, liners, and rebuilds for homes and multi-families.

Commercial Chimneys

Masonry stacks and venting chimneys on apartment buildings and mixed-use properties.

Chimney Masonry Contractors for Every Part of the Stack

A chimney is a system. When one part fails, water finds its way into the rest. Here's what each part does and what we repair. Tap a number to jump to it.

12345
  1. 1

    Chimney Cap

    A metal hood with mesh sides that keeps rain, snow, animals, and debris out of the flue. A missing cap is one of the most common reasons a chimney leaks straight down the inside.

  2. 2

    Chimney Crown

    The concrete slab on top of the brick. It should be sloped, overhang the brick, and have a drip edge. Many older crowns are just a thin layer of mortar that cracks within a few winters.

  3. 3

    Flue Liner

    The inner channel that carries smoke and gases out. Cracked clay tiles or an unlined flue let heat and acidic condensation attack the brick from the inside.

  4. 4

    Brick & Mortar Joints

    The body of the chimney. Eroded joints and spalled brick are the most visible signs of trouble and the starting point for leaning and collapse.

  5. 5

    Flashing

    The metal seal between the chimney and the roof. Failed or tar-patched flashing is behind most leaks that show up on ceilings and walls next to the chimney.

TESTIMONIALS

What our clients are saying

Chimney Repair Services in Massachusetts

From a few open joints to a full rebuild above the roofline, these are the chimney repairs we handle most, what each one involves, and when it's the right fix.

Chimney Tuckpointing & Repointing

When mortar joints are cracked, sandy, or recessed, water gets behind the brick face and freeze-thaw does the rest. We cut out failed mortar to a consistent depth and repoint with a mix matched to your brick, so the joint wears instead of the brick. On older chimneys, that often means a softer, lime-rich mortar rather than straight Portland cement.

  • Failed joints cut out without chipping brick edges
  • Mortar matched for strength and color
  • Packed in layers and tooled to the original profile
  • Loose bricks reset as we go
The right call when

The chimney is still plumb and the brick is sound, but the joints are cracked, sandy, or recessed a quarter inch or more.

Chimney Repair in Boston: Problems We Fix

Boston's housing stock, its weather, and a century of heating changes create the same chimney problems over and over. Here's what we see most, and how we deal with each one.

01

Old Flues Venting New Heating Systems

Plenty of Boston chimneys were built for coal or wood and now vent a high-efficiency gas or oil furnace. The cooler exhaust condenses inside the flue, and that acidic moisture breaks down clay tile and mortar from the inside out. You may see crumbling mortar at the top, white staining, or flakes of tile at the base of the flue.

How we fix it

We inspect the flue, repair the masonry, and install a stainless steel liner sized to the appliance when the existing flue isn't safe or suitable.

02

Leaning Chimneys on Triple-Deckers and Tall Stacks

Tall chimneys on triple-deckers and older multi-families take the full force of the wind. Mortar on the weather side wears away first, and flue gases can cause the mortar inside to expand. Over time the stack starts to lean, often away from the side that takes the most weather.

How we fix it

A leaning chimney usually needs to come down to sound masonry and be rebuilt. We don't recommend patching a chimney that has moved.

03

Cracked Mortar-Wash Crowns

A lot of older chimneys were finished with a thin layer of mortar troweled over the top course instead of a real crown. It cracks within a few freeze-thaw cycles, and water goes straight down into the brick and the flue.

How we fix it

We remove the failed wash and form a proper sloped crown with an overhang and drip edge, then add a stainless steel cap.

04

Flashing Leaks After Nor'easters and Ice Dams

Wind-driven rain from nor'easters and ice dams in late winter push water under flashing that's already tired. Tar patches hide the problem for a season, then crack. The result is a stain on the ceiling or wall beside the chimney.

How we fix it

We strip the patches, replace the flashing with step and counter flashing cut into the mortar joints, and make sure the crown above isn't feeding water down the brick.

05

Spalling Brick and Crumbling Joints

Water soaks into the brick, freezes, and expands. Each winter the brick faces flake a little more and the joints get deeper. Earlier repairs with hard cement mortar make it worse, because the brick becomes the weakest part of the wall.

How we fix it

We replace damaged brick, remove incompatible mortar, and repoint with a mix matched to the original.

06

Unused Chimneys Left Open to the Weather

When a house switches to a direct-vent boiler or a heat pump, the old chimney is often left standing with no cap and no maintenance. It keeps taking on water, deteriorates faster, and can let animals into the house.

How we fix it

Depending on its condition, we cap and seal it, repair it, or take it down below the roofline.

Have a chimney issue or repair project in mind?

Let’s talk.

We work with homeowners and property managers across Greater Boston, providing reliable chimney repair, rebuilding, and maintenance. From minor fixes to full chimney work, our focus is on clear communication and long-lasting results.

Signs You Need Chimney Mortar Repair

Most chimney damage is visible from the ground or the attic long before it turns into a leak or a lean. If you see any of these, it's time for an inspection.

  • Mortar joints that are sandy, recessed, or missing
  • Brick faces flaking, popping off, or crumbling
  • Cracks in the crown or pieces of it on the roof
  • A chimney that leans or looks out of plumb
  • Water stains on the ceiling or wall near the chimney
  • White powder (efflorescence) on the brick
  • Rusted, bent, or tar-covered flashing
  • No cap, or a cap that's rusted or loose
  • Flue tile fragments in the firebox or cleanout
  • Damp, musty smell around the fireplace in summer

Chimney Repair or Chimney Rebuild?

The right answer depends on how far the damage has gone. Here's how we decide, and we'll always show you the evidence on your chimney.

Repair

When the structure is still sound

If the chimney is plumb and the brick is mostly intact, targeted repairs can add decades of life.

  • Joint erosion on some faces of the chimney
  • A few loose or spalled bricks
  • Cracked crown or missing cap
  • Failed or tar-patched flashing
  • Early staining with no interior damage
VS
Rebuild

When the chimney has moved or lost its strength

Once a chimney leans or the mortar is gone through the wall, repair can't make it safe.

  • Visible lean or separation from the house
  • Deterioration through most of the stack
  • Loose brick at the top courses
  • Repeated leaks after earlier repairs
  • Interior water damage around the chimney

How Our Chimney Masons Work

A clear process from the first call to the final walkthrough, so you always know what's happening on your roof.

  1. 1

    Roof-Level Inspection

    We check the cap, crown, flue, brick, joints, and flashing, and look at the attic side if there's a leak.

  2. 2

    Photos & Explanation

    You see what we saw. We explain what's urgent, what can wait, and why.

  3. 3

    Written Estimate

    A clear scope, materials, and price in writing before any work is scheduled.

  4. 4

    Staging & Roof Protection

    We schedule around the weather, set up staging safely, and protect the roof, landscaping, and walkways.

  5. 5

    Repair With Matched Materials

    Brick and mortar matched to your chimney, with every joint packed and tooled the right way.

  6. 6

    Walkthrough & Cleanup

    Final photos, a walkthrough of the finished work, and a clean site.

Chimney Repair Cost in Massachusetts

Every chimney is priced after an inspection, because height, access, condition, and materials vary so much. This overview shows what each repair involves and when it makes sense.

RepairWhat It InvolvesWhen It's the Right Call
Repointing / TuckpointingCutting out failed joints and repointing with matched mortarEroded or cracked joints on a chimney that's still plumb
Crown Repair or ReplacementSealing cracks or forming a new sloped crown with a drip edgeCracked or crumbling crown, water entering from the top
Chimney CapInstalling a stainless steel cap sized to the flueMissing or rusted cap, animals or rain in the flue
Flashing ReplacementNew step and counter flashing at the rooflineLeaks beside the chimney, tar patches, rusted metal
Leaning Chimney RepairTaking the stack down to sound masonry and rebuildingVisible lean or separation from the house
Chimney RebuildPartial or full rebuild with new crown, cap, and flashingWidespread deterioration or repeated failed repairs
Chimney LinerInstalling a stainless steel liner sized to the applianceCracked clay tiles, unlined flue, or a new heating system
Cap Off or RemoveSealing an unused chimney or removing it below the roofChimney no longer used and deteriorating
Where We Work

Chimney Repair Near You in Massachusetts

We repair, repoint, and rebuild chimneys throughout Boston, the South Shore, Plymouth County, and the South Coast. Choose your town to see local masonry and chimney services.

Greater Boston Metro

Boston, MABrookline, MANewton, MADedham, MA

South Shore

Braintree, MANorwood, MAHingham, MAWeymouth, MARockland, MAAbington, MACohasset, MA

Brockton & Surrounding Towns

Brockton, MARandolph, MAStoughton, MAHolbrook, MARaynham, MAPembroke, MAMarshfield, MAKingston, MA

Plymouth County

Taunton, MAPlymouth, MACarver, MAMiddleborough, MALakeville, MANorton, MAMansfield, MA

South Coast

Wareham, MAMarion, MAMattapoisett, MARochester, MAAcushnet, MANew Bedford, MADartmouth, MAWestport, MAFairhaven, MA

Don't see your town listed? We likely still cover your area. Contact us for a free estimate.

Request a Free Quote

Chimney Repair FAQs

Answers to the questions Boston-area homeowners ask us most about chimney repair.

How often should a chimney be inspected?

At least once a year, according to the NFPA 211 standard. Late summer or early fall is ideal in Massachusetts, so any repairs can be finished before freezing weather. Chimneys that vent a gas or oil system need inspection too, not just wood-burning fireplaces.

Can chimney repair be done in winter?

Some repairs can, such as flashing replacement, cap installation, and emergency stabilization. Mortar work needs temperatures above freezing to cure properly, so repointing and rebuilding are best scheduled from spring through fall unless we can protect and heat the work area.

How do I know if my chimney needs repair or a rebuild?

If the chimney is plumb and the damage is limited to joints, a few bricks, the crown, or the flashing, repair usually works. If it leans, has loose brick near the top, or the mortar has failed through most of the stack, a partial or full rebuild is the safe option. We'll show you photos either way.

What's the difference between a chimney crown and a chimney cap?

The crown is the concrete slab that covers the top of the brick and sheds water away from it. The cap is the metal hood with mesh sides that sits over the flue opening and keeps out rain, animals, and debris. A chimney needs both to stay dry.

Why does my chimney only leak during heavy rain or snowmelt?

Wind-driven rain and melting snow reach places normal rain doesn't, such as worn flashing, open mortar joints on the weather side, and cracks in the crown. That's why chimney leaks often seem random. Finding the true source usually takes a roof-level inspection.

Do I need a chimney liner after switching to a new furnace or boiler?

Often, yes. Modern gas and oil appliances produce cooler, wetter exhaust that condenses in an old flue and damages clay tile and mortar. A liner sized to the new appliance protects the chimney and helps it vent correctly. We'll check the existing flue and tell you what's needed.

Can an unused chimney be capped off or removed?

Yes. An unused chimney can be capped and sealed to keep water and animals out, or taken down below the roofline and the roof patched. The right option depends on the chimney's condition and whether you might use it again.

Does homeowners insurance cover chimney repair?

It depends on the policy and the cause. Sudden damage, such as a storm or a falling tree, is sometimes covered, while gradual wear and lack of maintenance usually is not. Check with your insurer. We can provide photos and a written description of the damage.

How long does chimney repointing last?

Done with compatible mortar and with the crown, cap, and flashing working properly, repointing can last for decades. Chimneys are the most exposed masonry on a house, so an annual inspection helps catch small problems before they spread.

Do you offer free chimney repair estimates?

Yes. We inspect the chimney, explain what we found, and give you a clear written estimate before any work begins. Call (857) 249-5127 or request an estimate online.

Skilled in brick, stone, and chimney work, we deliver durable, high-quality masonry services that keep Boston homes safe, strong, and looking their best.

Skilled in brick, stone, and chimney work, we deliver durable, high-quality masonry services that keep Boston homes safe, strong, and looking their best.