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.
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Before
AfterDuraFlex Chimney Liner & Rebuild in Naperville: What to Know First
We provide independent DuraFlex chimney liner and rebuild service in Naperville, typically quoting jobs within 48 hours of your call and completing most liner replacements or partial rebuilds in one to two scheduled days. Every DuraFlex job starts with a camera-scan inspection, a written price, and a written scope before any work begins. This page is for Naperville homeowners who already know they have a DuraFlex liner installed, suspect it’s failing, and want straight information on what repair or replacement actually costs and involves. Call us at (331) 265-1700 or book online; a live person answers the phone 24 hours a day.
How DuraFlex Products Fail - and How We Fix Them
- DuraFlex SW 304 and 316 flexible liners: These show up in Naperville’s 1980s and 1990s colonials more than any other flexible line. The 304-grade version in particular develops pinpoint corrosion at the flex points when it’s coupled with a gas appliance that wasn’t properly derated for the flue diameter. We see this in the Cress Creek area where builders spec’d 304 to hit a price point. Our fix is a 316Ti replacement with proper appliance-specific sizing, not a same-grade swap.
- DuraFlex DVL double-wall stovepipe transitioning into masonry: The inner wall can separate at the telescoping joint after repeated thermal cycling, especially in Naperville’s freeze-thaw climate where attic temperatures swing 60 degrees in a March afternoon. Homeowners smell smoke or see staining at the ceiling thimble. We pull the DVL run, inspect the masonry transition with a camera, and replace with a new DVL section or convert to a solid-pack liner if the thimble is compromised.
- DuraFlex Pro rigid liner sections: The male-female slip joints loosen over time if the original installer didn’t use the locking band orientation DuraFlex specifies (bands above the joint, not spanning it). We’ve found this on three jobs near the Riverwalk corridor in older homes with multiple offset corrections. We reseat with proper band placement and add support brackets where the original installer skipped them.
- DuraFlex smooth-wall liners with factory insulation: The foil-wrapped insulation blanket can sag and create voids when exposed to the humidity spikes common in Naperville basements during summer. The liner then overheats locally and the stainless shows rainbow discoloration or micro-cracking. We strip the failed wrap, install a new DuraFlex smooth-wall with proper mesh and refractory mix, or switch to a poured insulation backfill if the chase geometry allows.
- DuraFlex tee connections and cleanout assemblies: The tee body on pre-2010 installations can crack at the snout where the cleanout door mounts, particularly if the homeowner or a sweep used the door as a foot brace during cleaning. It’s a parts-availability issue: DuraFlex revised the tee casting in 2012, so older snouts are NLA from the factory. We machine-adapt the new tee body to existing liner diameters or fabricate a transition, whichever preserves more of your original installation.
Our DuraFlex Chimney Liner & Rebuild Process
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Call and schedule a Level 2 inspection. We ask what appliance type, what you smell or see, and when it started. We assign a named technician and text you when they’re en route.
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Camera scan and documentation. Our tech runs a chimney camera the full flue length, records video and stills, and notes liner gauge, joint condition, and masonry integrity. You watch the feed in real time if you’re home. The camera doesn’t guess. Neither do we.
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Written price and scope. Within 24 hours you receive a written quote with three elements: the exact DuraFlex or compatible replacement part numbers, the labor scope, and the warranty terms. No verbal estimates. Clause 1 of the Haven Standard requires it in writing before work starts.
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Parts procurement. We source DuraFlex OEM through our Haven buying network, or specify a quality aftermarket equivalent from HeatShield or Gelco if DuraFlex lead times stretch past safe burning season or if the application calls for a different approach. We tell you which we’re using and why.
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Installation and testing. We install to NFPA 211, perform a smoke or pressure test depending on the appliance type, and photograph every critical joint and termination. Corrine Halstead reviews the photo set before we call the job complete.
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Documentation and follow-up. You receive a printed or digital job packet: before-and-after photos, test results, warranty card, and a reminder schedule for your next inspection. The 365-Day Done Right Promise applies from day one.
Before
AfterWhat DuraFlex Chimney Liner & Rebuild Costs in Naperville
| Service | Typical Range | What Moves the Price |
|---|---|---|
| DuraFlex flexible liner replacement (single flue, gas appliance) | $2,800 - $4,200 | Flue length, number of offsets, whether the existing liner pulls clean or requires demolition |
| DuraFlex flexible liner replacement (single flue, wood-burning) | $3,400 - $5,600 | Insulation requirement, tee and cap replacement, smoke chamber parging if needed |
| DuraFlex Pro rigid liner repair (sectional replacement, 1-2 joints) | $1,800 - $3,100 | Accessibility of the joint, need for new support brackets, chase top modification |
| Partial chimney rebuild with DuraFlex liner replacement | $6,500 - $11,000 | Courses to rebuild, crown condition, whether the firebox or smoke chamber needs work |
| Full chimney rebuild with new DuraFlex liner system | $12,000 - $19,000 | Height, scaffolding requirements, matching existing brick, permit complexity |
These are 2024-2025 Naperville market ranges based on our actual completed jobs. Every estimate is free, and we honor our Free Second Opinion on any competitor’s written quote. Call (331) 265-1700 for your exact number.
Why Naperville Homeowners Call Level Two Chimney Naperville for DuraFlex Work
We’ve inspected and documented more than 38,000 chimneys since 2009, and a measurable slice of those have been DuraFlex installations in Naperville and the western suburbs. Our technicians carry the Haven Standard checklist on every job, not a generic work order. That means background-checked crews in uniform, license information on request, and a named tech who knows the difference between a 304 and 316Ti flex rating without checking his phone.
When DuraFlex parts run long on lead time, we don’t leave you hanging through burning season. Our buying network with HeatShield, Gelco, Olympia Chimney, Famco, and Copperfield gives us alternatives we can explain and document, not substitute in silence. The 365-Day Done Right Promise is stamped on every job. If it’s not right, we make it right.
FAQs
No, if the work is performed using DuraFlex-compatible parts and proper installation methods. As an independent DuraFlex service provider, we are not affiliated with or authorized by DuraFlex, and we do not file warranty claims on your behalf. What we do is install to NFPA 211, use OEM or spec-matched aftermarket components, and document everything so you have a record if a factory defect claim ever arises. The warranty that matters most to our customers is our 365-Day Done Right Promise. Call (331) 265-1700 for a free estimate.
The camera scan decides. We look for three things: wall thickness loss below 26 gauge equivalent, joint separation or corrosion at flex points, and masonry damage that compromises the liner’s support structure. If we find isolated joint failure in an otherwise sound 316Ti liner, we repair. If the flex section shows generalized corrosion or the 304-grade liner is past 15 years in a gas application, we replace. You see the footage and we explain the cutoff before you decide. Call (331) 265-1700 to schedule.
Most common DuraFlex flex and rigid components arrive within three to five business days through our Haven buying network. Tee bodies for pre-2012 installations and custom diameters can run two to three weeks. We tell you the lead time in your written quote and flag it if burning season timing is tight. When DuraFlex factory lead times don’t work for your schedule, we quote a HeatShield or Gelco equivalent with equivalent or better specifications. Call (331) 265-1700 to check current availability.
A straightforward flexible liner replacement in a single-flue chimney with good roof access takes one scheduled day. Jobs with multiple offsets, a damaged smoke chamber requiring parging, or a chase that needs partial rebuild before the liner goes in run two days. We don’t rush the camera verification or the pressure test at the end. The written quote includes the day count so you can plan. Call (331) 265-1700 for a specific timeline on your chimney.
A compromised flue liner allows combustion gases, including carbon monoxide, to leak into wall cavities or living space. In wood-burning systems, a damaged liner also raises the risk of creosote ignition in the masonry surround. The specific risk depends on what the camera finds: a separated DVL joint is an immediate CO hazard, while a thinning flex liner in a gas fireplace is a slower deterioration. We don’t use scare tactics; we show you the footage, explain the failure mode, and tell you whether the condition is “schedule soon” or “don’t burn until fixed.” Either way, the inspection itself is the first step. Call (331) 265-1700 to book.
Ready to get the straight story on your DuraFlex chimney liner? Call Level Two Chimney Naperville at (331) 265-1700. A live person will answer, schedule your free estimate, and assign a technician who knows DuraFlex products from the inside out. Written price before work starts. Photo record when it’s done. That’s the Haven Standard.
Written by Corrine Halstead, Owner, Level Two Chimney Naperville at Level Two Chimney Naperville, serving Naperville and nearby areas.