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.
DuraFlex Chimney Cleaning in Somerville, MA | Hearthstone Chimney Co.
We provide Chimney Cleaning & Sweep - Somerville with independent DuraFlex liner service across the city, with crews who understand how triple-decker shared stacks change every step of the job. What makes our DuraFlex work here different is simple: before we touch a brush to any liner, we camera-scope every flue in the stack to confirm which unit it actually serves, because in Somerville’s dense triple-decker housing, a misidentified flue can backdraft smoke or CO into a neighbor’s apartment. Call us at (857) 392-4709 for a free estimate.
Why Somerville Residents Choose Us for DuraFlex Service
Russell Haines learned this trade at Los Angeles Trade-Technical College before coming east, and he and our crew have spent years working the older brick-stack homes around Cambridge and Somerville, including the tall triple-deckers where three or four flues share one chimney and nothing is ever quite square. We’ve pulled enough DuraFlex liner to know its fittings, insulation wraps, and termination quirks by feel, and we stock factory top plates, caps, and appliance connectors because aftermarket substitutions rarely seat correctly in these old flue openings.
We’re not DuraFlex-authorized or manufacturer-affiliated. We’re an independent shop that specializes in their liners because they hold up when installed right, and because we’ve seen what happens when they’re not. Our Level-2 inspections end with photos you can see and a plain-English verdict. The 90-Day Done Right Promise covers every job in writing, no arguing. A live person answers our phones 24 hours a day, and our technicians are background-checked, uniformed, and equipped to complete most DuraFlex service calls in a single visit.
Common DuraFlex Chimney Cleaning Problems We Solve in Somerville
- Condensation degradation in oversized flues. Somerville’s triple-deckers were built with coal flues, later converted to oil, then gas. The original opening is too large for modern low-temperature gas appliances, so the DuraFlex liner runs undersized and collects heavy condensation. That moisture degrades the insulation wrap and accelerates external corrosion at the top termination. We measure the flue, match the liner to the appliance, and replace saturated wraps before the stainless steel pits.
- Cross-connection smoke and CO migration. In a shared brick stack with three or four flues, a DuraFlex liner dropped into one unit can be misidentified as the neighbor’s. We’ve found this in East Somerville and Winter Hill, where undocumented caps and unmarked liners create dangerous backdraft paths. Our first step is always camera confirmation of flue identity and separation.
- Freeze-thaw water intrusion at the crown. Somerville sits in the New England freeze-thaw belt with dozens of cycles each winter. Tall triple-decker stacks get minimal sun exposure between buildings, so mortar joints open and crowns crack. Water runs behind the DuraFlex top plate and rusts the anchor band. We re-terminate with factory top plates and recommend chimney waterproofing on stacks showing this pattern.
- Hidden creosote stratification behind the liner. Cracked terra cotta between the DuraFlex liner and the original flue wall lets creosote accumulate on exposed masonry, a fire load you can’t see from below. Our camera inspection checks this gap specifically in Somerville’s older stacks.
- Misdocumented liner installations from previous owners. In Winter Hill especially, we’ve found DuraFlex liners the seller swore were “recently installed” with no paperwork, wrong cap size, or termination below the crown line. We document what we find, show you the photos, and give you a written verdict on whether it stays or comes out.
DuraFlex Service in Somerville: What Local Conditions Mean for Your Equipment
Because so many Somerville triple-decker stacks share three or four flues that were repurposed and sometimes undocumented across coal-to-oil-to-gas conversions, we treat flue identity and separation as a mandatory first step before any Somerville Chimney Repair or DuraFlex cleaning work. This step is nearly irrelevant in single-family suburban homes with one flue per chimney, but here in Somerville, skipping it risks cross-connection between separately tenanted floors. In Winter Hill, a third-floor tenant lit a gas fireplace insert and smoke traced down into the second-floor kitchen through a cracked common flue wall behind a DuraFlex liner the previous owner had installed without documenting it. Our tech camera-scoped all four flues in the shared brick stack, confirmed the misidentified liner, re-terminated the correct unit’s DuraFlex top plate, and fitted a multi-flue cap that keeps each apartment’s flue separated and weather-tight. That kind of scenario is why we don’t guess, and why we don’t let our crews start brushing until every flue in the stack is mapped. If it needs doing, we will tell you. If it does not, we will tell you that too.
DuraFlex Models & Products We Service in Somerville
We work with the full DuraFlex line: DuraFlex sales & service includes SW (standard wall) 316L stainless flexible liner kits, Pro double-wall insulated systems, 304L alloy liners for wood-burning fireplace inserts, and appliance connector and tee kits for gas and oil conversions. Our Somerville crews carry factory top plates, caps, and connectors on the truck because a shared triple-decker stack doesn’t tolerate a parts run. When a DuraFlex liner is pitted or its insulation wrap is saturated, we tell owners honestly whether re-terminating and re-capping buys them years or whether the liner needs to come out. No upsell, no manufactured urgency, just the finding and what it means for your chimney.
DuraFlex Service Pricing in Somerville
DuraFlex chimney cleaning in Somerville typically runs $180-$340 for a standard sweep and Level-1 inspection on a single flue with accessible cleanout. Level-2 camera inspection, required for most triple-decker shared stacks, adds $150-$275. Multi-flue cap installation on a shared stack runs $450-$890 depending on flue count and access. Chimney waterproofing for freeze-thaw damaged crowns is $380-$720. Every estimate is itemized upfront, the number on the estimate is the number on the invoice, and estimates are free. Call (857) 392-4709 for exact pricing on your stack.
Serving Somerville, MA - Our Local Coverage Area
We’re based in the Somerville 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 - DuraFlex Chimney Cleaning in Somerville
Yes. We camera-scope every flue in the shared stack before cleaning to confirm identity and separation. This is standard procedure for us in Somerville, where undocumented conversions are common. Call (857) 392-4709 to schedule.
No. DuraFlex stainless liners require poly or wire brushes matched to the liner diameter and alloy; steel brushes can score 316L or 304L. We also inspect the insulation wrap condition during cleaning, which isn’t a factor with bare terra cotta.
Freeze-thaw cycling opens mortar at the crown, letting water run behind the plate. Tall triple-decker stacks with minimal sun exposure are especially prone. We replace with factory stainless top plates and address the crown leak to stop the cycle.
Level 2. Shared triple-decker stacks, fuel conversion history, and the need to verify flue separation all require camera inspection of interior surfaces. A Level 1 visual check from the bottom is not sufficient here.
Yes, if each liner is properly terminated and the cap is sized to the stack with individual flue separation. We fit multi-flue caps regularly on Somerville triple-deckers to prevent cross-connection and weather intrusion. Call (857) 392-4709 for a free assessment.
Service Areas Near Somerville
We provide Somerville service area coverage across all neighborhoods, with regular calls from DuraFlex service in Cambridge and DuraFlex service in Malden as well. We also work in Everett, Medford, and Belmont on the same triple-decker and shared-stack problems that define this part of Middlesex County.
Book Your DuraFlex Service in Somerville Today
Call (857) 392-4709 now. A live person will answer, day or night, and we’ll get you scheduled for a free estimate. We’ll be there when we say, show you photos you can see, and give you a plain-English verdict on your DuraFlex liner. Done right, and we stand behind it.
Written by Russell Haines, Owner at Hearthstone Chimney Co., serving Somerville since 1984.





Before
After
Before
After
Before
After