Chimney Rebuild for stacks too loose or damaged to repoint
A Chimney Rebuild takes a damaged chimney down, course by course, to brick that is still solid and lays it up again with new mortar and a properly formed crown. It is the answer when bricks have worked loose through the whole stack, the top leans, or a storm has broken it. Our New Bedford office at 227 Union Street plans rebuilds for New Bedford homes and for Dartmouth, Acushnet and Fairhaven, most often for the part above the roof.
Why rebuilds come up on the South Coast
The part of a chimney above the roof is not warmed by the house and has no shelter from the weather. Here, three things add to that.
Three-decker stacks standing tall
Large three-decker districts went up in the 1890s, from Cove Street in the south end to Acushnet Avenue in the north. Their chimneys sit on top of three stories, and the exposed section can be long and heavy, carried only by the brick beneath it.
Nor’easters and tropical storms
Wind off the water loads the top of a tall stack hard. The hurricane barrier keeps storm tides off low-lying land but does nothing about wind, and a loose top can be pushed out of line or shed bricks in a single storm.
Years of freeze and thaw
Water that gets into the core of a stack through a cracked crown or open joints freezes and expands on every cold night. Over many winters it can leave bricks sitting loose on one another with little mortar holding them.
Housing ages, heating fuels and storm history come from the sourced notes on our community pages: New Bedford, Dartmouth, Fairhaven, Acushnet.
How a chimney rebuild goes
A rebuild only lasts if it sits on sound masonry, so the first job is finding where the good brick begins.
Find the solid base
We examine the stack to see how far down the damage reaches and whether the cause is limited to weather at the top or involves settling lower down.
Protect the roof and the house
Shingles around the chimney are covered, and the flue is closed off so mortar and brick dust do not fall into the rooms below.
Take the damaged courses down
Brick comes off one course at a time until sound masonry is reached. Bricks in good condition are cleaned and set aside for reuse where it makes sense.
Lay the stack back up
Courses are relaid in a suitable mortar, with flue tile or a liner carried up through the new brick and any original details reproduced.
Crown, cap and flashing
A new crown with an overhang and drip edge goes on top, a cap covers the flue, and flashing is fitted where the chimney meets the roof.
Rebuilds usually need a building permit, and the local building official decides what is required.
If a lean comes from movement at the foundation, rebuilding the top alone will not cure it, and we will tell you so.
Signs a chimney may need rebuilding
These can usually be seen from the ground or from inside. Please stay off the roof.
- A lean you can seeThe chimney is visibly out of plumb, or a gap is opening between the stack and the side of the house.
- Loose bricks at the topTop courses out of line, gaps between bricks, or pieces of brick found on the roof or on the ground.
- Joints with nothing left in themMortar gone so deep that daylight shows through, leaving the bricks stacked with little holding them together.
- Brick faces lost all overSpalling across many bricks means the masonry has been soaking up water for a long time.
- Damage after a stormA top knocked loose by wind or by a falling limb after a nor’easter or a tropical storm.
- Patches that keep failingRepairs that open up again in the same place show the damage goes deeper than the surface.
Is a rebuild the right call?
Rebuilding fits when the damage runs through the stack rather than across its surface. If only the joints are worn and a few bricks are damaged, tuckpointing is the more proportionate repair.
Ask for chimney rebuild when
- Top courses have shifted or come loose
- The chimney leans above the roofline
- Mortar has failed through the full thickness of the stack
- A storm has broken the top of the chimney
Ask about a different page when
- Worn joints on brick that is still tight: Chimney Masonry Repair and Tuckpointing
- Only the slab on top is cracked: Chimney Crown Repair
- You are not sure what is wrong: Chimney Repair
What decides how big a rebuild is
Rebuilds vary more than most chimney work. These are the main things that change the scope.
- How far down it goes
- Relaying the top few feet is a much smaller job than rebuilding everything from the roofline up.
- Width and number of flues
- A wide stack carrying several flues holds far more brick than a narrow chimney serving a single fireplace.
- Roof height and pitch
- A chimney on a three-story building or a steep roof needs staging and fall protection that add setup time.
- Matching brick and details
- Old brick can be hard to match, and corbelled tops or parapet details take extra work to reproduce faithfully.
- Permit and curing weather
- The time a permit takes and the temperatures mortar needs to cure both affect when the work can be scheduled.
No price list on this site, on purpose. Two chimneys that sound the same over the phone rarely are. Once someone from the New Bedford office has looked at yours, you get the scope in writing and decide from there.
More frames of this kind of work
Taken on Chimney Champ’s jobs and kept in the company photo library that all our locations draw on. The library holds no job addresses, so no frame here is tied to a street or a town.
See the matching gallery photosPhoto story: One brick chimney, photographed from every side
Questions about rebuilding a chimney
Can we use the fireplace or boiler while the chimney is being rebuilt?
No. The flue is closed off and out of service until the rebuild is finished and the mortar has cured. If the chimney vents your boiler or furnace, we plan the timing with you before work starts so the house is not left without heat.
Will the chimney look the same afterward?
The aim is to match the original as closely as is practical, reusing sound brick and rebuilding details such as corbelling. Weathered old brick is hard to match exactly in color, so we go over the choices with you before anything is taken down.
Do I need a permit?
Usually, yes. Requirements differ from one town to the next and the local building official makes the call. In New Bedford, the Department of Inspectional Services at 133 William Street issues repair permits and takes most applications through its online portal.
Should I take the chimney down instead?
If it no longer vents anything and you do not want the fireplace, removing it below the roof and patching the roof is a reasonable option. If it serves a boiler, a water heater or a fireplace you use, rebuilding is the way to keep it. We can talk through both.
Why does the top fail first?
Above the roof, the chimney is wet on every side in a storm, freezes harder than the rest of the house, takes the full force of the wind and gets no warmth from inside. Water damage collects there, so it is almost always the section that needs rebuilding first.
Booking, hours and general chimney questions are on the main FAQ; how a visit runs is on what to expect.
Often looked at alongside
- Chimney Masonry Repair and TuckpointingCutting out failed mortar, repacking the joints with a mix suited to the brick, and replacing damaged bricks.
- Chimney Crown RepairSealing, patching or recasting the concrete slab on top of the chimney so rain runs off the stack.
- Chimney Flashing RepairRebuilding step and counter-flashing at the roof line and adding crickets where wide chimneys trap snow.
- Chimney RepairTracing a chimney problem to the part that failed, then repairing that part rather than the symptom.
Background reading
- 6 minAfter a Coastal Storm: How to Check Your Chimney SafelyAfter a nor’easter or hurricane: what to look for from the ground, what not to do, and when a chimney needs inspecting before the next fire.
- 7 minThree-Decker and Two-Family Chimneys in New Bedford: What Owners Should KnowSeveral flues in one stack, gas boilers in old coal flues, tall tops in the harbor wind: how to look after a multifamily chimney.
- MapThe four places we coverNew Bedford · Dartmouth · Fairhaven · Acushnet, all from one office downtown.