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.
Before
After
Before
After
Before
AfterFast, Reliable Chimney Repair Across Cambridge
Chimney repair in Cambridge usually means working on a stack that’s 100 to 140 years old, built before modern flue sizing existed, and often shared by two or three separate units. We serve the whole city, from Harvard Square to East Cambridge to North Cambridge, with chimney repair crews who understand exactly what they’ll find when they get on a Cambridge roof: spalled brick, deteriorating mortar joints, and flue liners that were never the right size for the appliances now connected to them. Call (857) 567-8887 for a written, camera-verified repair quote. Free estimates, and we always show you the photos.
Why Level Two Chimney Boston Is Cambridge’s Preferred Chimney Repair Company
We’re the Chimney Repair team Cambridge homeowners call when they want to see proof of what’s wrong before paying for a fix. Every visit includes a camera scan down the flue and a documented photo record, so you’re never taking our word for it. We’ve completed more than 38,000 chimney inspections and cleanings since 2009, and every single one has come with a written price before work started, not after.
Our technicians are background-checked, uniformed, and licensed. They know Cambridge’s housing stock the way a local should: brick triple-deckers in The Port and Cambridgeport, stately Victorians in Avon Hill and Old Cambridge, and two-families packed shoulder-to-shoulder along streets where roof access means a ladder from a one-way alley. Corrine Halstead leads our operation, and she holds the team to the Haven Standard on every job. If it’s not done right, we make it right. That’s the 365-Day Done Right Promise, and it’s stamped on every job we do.
Our Chimney Repair Services in Cambridge
Flue Liner Repair & Relining in Cambridge
Most Cambridge chimneys we inspect were built for coal, not gas or oil. When a furnace gets converted, the flue is suddenly too big for the appliance venting into it. Oversized flues cool exhaust gases too quickly, causing condensation that eats away at the old terracotta tile. In Cambridge’s pre-1920 housing stock, we regularly find cracked or completely collapsed flue liners that went unnoticed for years. We reline with stainless steel, often sourcing DuraFlex liners sized specifically for modern gas and oil equipment.
Mortar Repointing
Mortar joints in century-old Cambridge chimneys break down from decades of freeze-thaw cycling, especially in exposed stacks that face the Charles River. When the mortar goes, bricks shift, water gets in, and the whole structure starts to fail from the inside out. We grind out the old joints and repoint with mortar matched to the original, restoring the stack’s structural integrity and keeping moisture out of the smoke chamber below.
Spalling Brick Repair
Spalling is what happens when moisture penetrates the brick face and freezes, popping off the outer layer. Cambridge’s damp winters and river humidity accelerate this on exposed crowns and caps. We remove the damaged brick, replace it with units matched for density and color, and address the moisture source. In attached rows, spalling on a shared stack doesn’t just affect one unit; it compromises the whole structure.
Flashing Repair
Chimney flashing is the metal that seals the gap where the stack meets the roofline. On Cambridge’s tight rows and flat-roofed triple-deckers, stepped or rusted flashing is one of the most common sources of roof leaks. We rebuild flashing with proper counter-flashing, ice and water shield, and correct step lapping so water runs away from the chimney, not into it. Fixing flashing right the first time matters; a bad flashing job leaks into ceilings and walls all winter.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Cambridge
When we reline or rebuild, we don’t use whatever’s on the shelf. We use materials sourced specifically to keep prices honest for Cambridge customers: DuraFlex stainless steel liners, HeatShield resurfacing material when the original flue is still sound enough to save, and Gelco flashing components. Because we buy through the Haven network, we keep material costs predictable, and we pass that on in a written quote. You’ll see the brand name on the written scope before you approve a dollar of work.
Common Chimney Repair Problems We See in Cambridge Homes
- Shared flue cross-contamination. In a triple-decker stack, a collapsed liner in one unit’s flue can leak exhaust into an adjacent flue. We’ve camera-scanned stacks where a second-floor apartment’s carbon monoxide was venting through a neighboring flue into someone else’s living space. A Level 2 camera scan is the only way to catch it.
- Oversized coal-era flues. Flues sized for coal furnaces are simply too big for modern gas and oil burners. The result is chronic condensation, acidic damage to old mortar, and liner cracking that gets worse every heating season. This is the single most common issue we see in Cambridge’s pre-1930 stock.
- Freeze-thaw spalling on crowns and caps. Exposed chimney crowns take the full force of Cambridge’s damp, cold winters. Water seeps into hairline cracks, freezes, expands, and pops the masonry apart. The river humidity makes it worse in neighborhoods like Cambridgeport and The Port.
- Flashing rot in tight rows. In attached properties, flashing doesn’t get the airflow it needs. Water sits at the roof-chimney junction, rusts the flashing, and finds its way inside. We rebuild flashing correctly with proper step and counter-flashing, so it lasts decades, not seasons.
Pricing for Chimney Repair in Cambridge, MA
In Cambridge, a standard mortar repointing on an accessible single-family chimney typically runs $800 to $1,900. Spalling brick repair involving 5 to 15 replacement bricks and crown work usually lands between $1,200 and $2,600. Flashing replacement on a typical pitched roof ranges from $600 to $1,400, and a complete chimney rebuild from the roofline up starts around $4,000 and can reach $12,000 on a tall triple-decker stack in a tight alley setup. Relining with stainless steel is the biggest variable, typically $2,800 to $6,500 depending on flue size and roof access.
What affects the price? Roof access is a big one. A chimney you can reach from a fire escape is different from one on a four-story brick row facing a one-way street with no alley parking. Scaffolding costs money, and we’ll tell you if it’s needed. But you’ll never pay a “Cambridge surcharge,” and you’ll always get the written price before we start. Call (857) 567-8887 for a free camera-backed estimate.
We Also Serve Cities Near Cambridge
While this page covers Chimney Repair in Cambridge, our crews regularly cross the Charles for jobs in Boston, Newton, Winchester, and Waltham. The housing stock changes, but the problems don’t: old flues, spalled masonry, and leaking flashing. If you’re just outside the city and need the same written-price, camera-verified approach, call us. We’ll bring the same standard to you.
Serving Cambridge, MA - Our Local Coverage Area
We’re based in the Cambridge 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 Cambridge
If your home was built before 1930 and still uses its original chimney, the flue was almost certainly sized for coal, and it’s oversized for a gas furnace. The telltale signs are condensation dripping from the cleanout, white staining at the flue tile joints, and a musty odor near the fireplace. We confirm it with a camera scan that measures the flue’s interior dimensions and compares them to your furnace’s rated venting capacity. Call (857) 567-8887 and we’ll bring the camera.
Yes, and it happens more often than anyone wants to admit. In a shared triple-decker stack, if one flue’s terracotta liner collapses, exhaust from that unit can cross into an adjacent flue and exit into another apartment. We’ve verified this exact failure on a Cambridgeport side street, where a gas boiler’s exhaust was pushing into a second-floor unit until we camera-scanned all three flues and found the path. If you smell exhaust, get it checked immediately; this is a carbon monoxide risk, not a maintenance issue. Call (857) 567-8887 and skip the guesswork.
The best window for masonry and flashing work is May through early October, before the first hard freeze. Repointing mortar needs temperatures above 40 degrees to cure properly, and waterproofing treatments require dry conditions. In Cambridge, the freeze-thaw cycle starts biting in November and doesn’t let up until April. If you’re seeing spalled brick or failing mortar now, book a camera inspection before winter locks the damage in. Reach us at (857) 567-8887 any time.
It depends on ownership. In a triple-decker that’s been condo-converted, the stack is often in the common area, and multiple unit owners may need to agree on the repair. If it’s a rental with one owner, the responsibility is usually the landlord’s. We’ll scout roof access and give you a written scope that makes it clear what’s being done to which flue, in case you need to share it with an HOA or co-owner. We do the documentation so you don’t have to play translator.
Annually, minimum. Cambridge’s rental turnover is constant, and a flue that worked fine for one tenant’s occupancy can sit unused for months and shift. More importantly, oversized flues serving gas boilers accumulate condensation damage faster than wood-burning flues. A Level 2 camera inspection catches liner cracks before they become cross-contamination or carbon monoxide problems. For owners of triple-deckers in The Port, Cambridgeport, or anywhere student tenants cycle through, an annual inspection is the cheapest insurance you can buy. Schedule one at (857) 567-8887.
Cambridge’s Old Chimneys Need a Different Kind of Attention
Here’s what you won’t get from a generic chimney company working off a national template: in Cambridge’s triple-deckers, a single stack often contains three or four separate flues, each originally sized for coal-fired furnaces. When those furnaces were converted to gas or oil, the oversized flues became a chronic source of condensation, acidic mortar damage, and backdrafting. Diagnosing which flue serves which unit, in a building with absentee landlords and annual student turnover, is a job-site reality no Cambridge chimney tech can ignore. It’s why we camera-scan every flue separately and document what we find. Clause 4 of the Haven Standard requires it; we’ve done it that way since 2009.
On a narrow side street in Cambridgeport, we rebuilt the top eight courses of a shared triple-decker stack after two flue liners collapsed and the third was venting a neighbor’s gas boiler into the second-floor unit. Our techs camera-scanned all three flues, confirmed cross-contamination, then installed DuraFlex liners sized for the modern appliances and repointed the spalled brick with matching mortar. All of it done from a ladder setup in a one-way alley where scaffolding wasn’t an option. That’s the reality of chimney work in this city, and we’re built for it.
Get a Written Chimney Repair Quote in Cambridge
We don’t do quotes over the phone that turn into surprise invoices. We come out, camera-scan the flue, take photos, and hand you a written scope with a written price and a written warranty before any work begins. You’ll see exactly what we found, exactly what it costs, and exactly what you’re getting. If you have a written estimate from another company, bring it; we’ll give you a free second opinion.
Call (857) 567-8887 and talk to a live person, 24/7. We’ll get a technician to your Cambridge address, camera in hand, ready to show you what’s actually going on inside your chimney. If it’s not done right, we make it right. That’s the promise, and it’s in writing.
Written by Corrine Halstead, Owner at Level Two Chimney Boston, serving Cambridge and the surrounding area since 2009.