Sweep & inspection
Caps & crowns
Flue relining
Masonry repair
Gas fireplace serviceLevel 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 Logan Square, IL | Sandstone Chimney Sweep
We clean, inspect, and repair DuraFlex stainless liners across Logan Square, and we do it with a working knowledge of this neighborhood’s particular chimney stock: 1890s-to-1920s brick two-flats and greystones where a single masonry stack usually carries two separate flues, one per unit. The thing that makes our DuraFlex work here different is simple. We expect the upstairs flue to be relined and the downstairs one to still be bare clay tile. It’s the most common condition we find off Milwaukee Avenue and Logan Blvd, and it changes how we approach every cleaning.
Sandstone Chimney Sweep is an independent DuraFlex service provider. We’re not manufacturer-affiliated or authorized. We work on their liners because they fit these old Chicago chimneys well. If you own a DuraFlex liner in Logan Square, call (833) 589-7835 for a free estimate.
Why Logan Square Residents Choose Us for DuraFlex Service
Norm Sobieski grew up in Albany Park and learned the mechanical side of this trade at Truman College, then spent years doing residential chimney work across the northwest neighborhoods before starting Sandstone. What that means for your DuraFlex liner in Logan Square is that we’ve seen how these stainless systems actually hold up inside century-old masonry stacks, not just how they look on a spec sheet.
DuraFlex liners hide what’s behind them. A corrugated 316L liner can be sound while the original clay tile and soft brick behind it are cracked and spalled from a hundred years of coal-then-gas service. That’s the part most sweep companies miss because they never run a camera past the liner. We do. We’re a full-scope chimney company: we sweep, we diagnose, and we repair. Our DuraFlex sales & service work starts with the cleaning but rarely ends there, and we stock genuine DuraFlex sections, insulation wraps, and cap components so the fix doesn’t wait on a parts order. See our Logan Square service area coverage for streets and ZIP codes we work.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Solve in Logan Square
- Sound liner, failing chimney behind it. On 25-foot-lot workers’ cottages near the Milwaukee corridor, we often find the DuraFlex corrugated liner intact but the surrounding original brick spalled and the clay tile behind it cracked. The liner isn’t the whole story. We sweep, then run a Level 2 camera to map what the liner is actually supporting.
- Water and freeze-thaw damage at the crown. Chicago’s midwinter thaws push water past a failed cap or cracked crown, and rust forms at the stainless collar where the DuraFlex liner terminates. We see this most on the exposed top sections of two-flat stacks along Logan Blvd. Repointing the crown and replacing the cap is usually the fix, not a full reline.
- Upstairs relined, downstairs bare. This is the Logan Square signature. One DuraFlex liner on the second-floor furnace flue, while the first-floor flue in the same stack is still bare clay tile. Two different draft profiles, two different creosote loads, one shared masonry stack. We evaluate both flues every time, not just the one that was recently serviced.
- Loose or missing multi-flue caps. Lake-effect snow and ice get into shared stacks when the cap is loose or gone entirely. Then squirrels and birds build in the termination screen of the DuraFlex liner and block it. We stock stainless multi-flue caps sized for two terminations, which is what most Logan Square two-flats need.
- Creosote accumulation in rarely-used flues. A DuraFlex liner serving a furnace flue that only runs in heating season still builds creosote in the shoulder months. October and November are busy for us in Logan Square because the flue has been dormant since April. A clean flue isn’t a luxury, it’s just what a working fireplace requires.
DuraFlex Service in Logan Square: What Local Conditions Mean for Your Equipment
Here’s the information-gain piece. On Logan Square’s two-flats, the chimney almost always carries two separate flues in one masonry stack, one per unit’s furnace or water heater. That means a single apparent “chimney problem” is really two heating systems sharing a century-old brick structure. When we clean a DuraFlex liner on the upstairs flue, we routinely find the downstairs flue still bare clay tile, sometimes soot-clogged to half its diameter. On a recent two-flat off North Milwaukee Avenue, our crew pulled a Level 2 camera through a shared stack and found exactly that: a sound DuraFlex 316L liner on the upstairs furnace flue, bare soot-clogged clay tile on the downstairs one, and an original brick crown spalling badly at the party wall. We swept and removed creosote from the bare flue, repointed the crown, and installed a stainless multi-flue cap sized for both terminations. The downstairs unit’s draft improved immediately. That’s what DuraFlex cleaning in Logan Square actually looks like in practice. It’s rarely just a cleaning.
Chicago’s hard freeze-thaw cycles work against every old brick chimney in this neighborhood. Deep freezes followed by midwinter thaws crack soft original brick and mortar crowns. Heavy lake-effect snow and ice dams at the roofline drive water into unlined flues. And the long heating season keeps the flue in near-constant use from October to April. DuraFlex liners hold up well, but they’re mounted inside a masonry structure that’s been taking that punishment for over a century. That’s the part you can’t fix with a liner alone.
DuraFlex Models & Products We Service in Logan Square
We work on the full DuraFlex residential lineup. The AL 316L corrosion-resistant stainless liner handles wood and gas appliances, and it’s what we see most often on Logan Square’s converted two-flats. The Pro 316L smooth-wall liner is specified for gas furnace and water heater flues, and those are the systems we evaluate when a two-flat got converted to condos and the flue now serves one mechanical unit instead of a fireplace. We also service Insulated Pro liner kits with foil-faced insulation wrap, plus stainless multi-flue and custom cap assemblies sized for shared stacks.
Our repair philosophy is straight. We stock genuine DuraFlex liner sections, insulation wraps, and cap components for exact-fit repairs. We use quality aftermarket caps and clamps where they’re compatible. If a liner is sound, we repair the crown, flashing, or cap rather than sell a full reline. And we tell you plainly when full replacement is the only safe call. No upselling. You get the camera images and you see what we see.
See the difference
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After
Before
After
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AfterDuraFlex Service Pricing in Logan Square
Chimney sweep and Level 2 inspection with video camera for a DuraFlex liner in Logan Square typically runs $249 to $449. A stainless multi-flue cap replacement usually falls between $225 and $450 depending on the termination count and roof access. Mortar repointing at the crown starts around $400 to $675, and full DuraFlex reline work for a Logan Square two-flat furnace flue runs $1,800 to $3,200 depending on flue length and whether insulation wrap is needed.
What drives cost: number of flues in the stack, roof access from narrow 25-foot lots, and whether the liner is terminated in a shared party-wall stack. The free estimate includes a Level 2 camera inspection and a photo report. You see every image. If the liner is sound, we say so and charge you for the sweep, not a pitch. Call (833) 589-7835 for an exact quote.
Serving Logan Square, IL — Our Local Coverage Area
We’re based in the Logan Square 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 Logan Square
Yes, and here’s why. One chimney, two flues, two separate DuraFlex service evaluations. We camera each flue independently because the upstairs flue is frequently already relined while the downstairs is bare clay tile. The draft and creosote profiles are different, and so are the problems. We inspect both during every visit, not just the one you called about. Call (833) 589-7835 to book both flues in one appointment.
No. A DuraFlex liner is one component inside a masonry system. It solves the flue-gas containment problem, but it doesn’t fix spalled brick, a cracked crown, failed flashing, or water intrusion at the termination. On Logan Square’s century-old stacks, those are often the bigger issues. We evaluate the whole stack, not just the liner. If the liner is sound and the brick is failing, we say so and price the repair separately.
Yes, we do it regularly. DuraFlex corrugated liners flex well enough to navigate the offsets and tight turns common in Logan Square’s 25-foot-lot workers’ cottages and two-flats where the chimney sits at the shared wall between units. Access is tight, staging takes care, and we account for that in the quote. It’s slower work than a freestanding chimney, but it’s routine for us.
Usually the cap, not the liner. Chicago freeze-thaw works on the cap mounting and crown first. We inspect the stainless collar where the liner terminates. If the collar is sound and the liner isn’t rusted, we replace the cap and secure it properly. If there’s rust at the collar from water getting past the old cap, we address that section too. Either way, we show you the camera images before any work proceeds.
Before the furnace or water heater gets connected, not after. The flue needs to be swept, camera-inspected, and the liner evaluated while the mechanicals are still being roughed in. We do a lot of this work on Logan Blvd and Milwaukee corridor gut rehabs, and the pattern is the same: the upstairs flue was relined years ago, the downstairs one is bare clay tile, and the crown hasn’t been touched since the last coal fire. Call (833) 589-7835 during the rough-in phase, and we’ll get it scheduled before your inspection.
Service Areas Near Logan Square
We provide DuraFlex chimney cleaning and repair throughout Logan Square’s 60647 ZIP code and the surrounding neighborhoods. We serve DuraFlex service in East Garfield Park, DuraFlex service in Bridgeport, plus West Town, Lincoln Park, and the Near North Side. If you’re on a street with shared party walls and century-old brick, we know the stack.
Book Your DuraFlex Service in Logan Square Today
We find it, we fix it. Same team from camera inspection to crown repointing to cap replacement. Your flue is a system, not just a pipe. Call (833) 589-7835 for a free estimate, and we’ll get your DuraFlex liner cleaned and your Logan Square stack evaluated on the same visit.
Written by Norm Sobieski, Owner at Sandstone Chimney Sweep, serving Logan Square and the surrounding Chicago neighborhoods.