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
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Before
AfterDuraFlex Chimney Liner & Rebuild in Lansdale: What to Know First
We provide independent DuraFlex chimney liner and rebuild service in Lansdale, with most liner replacements completed in one to two days and full rebuilds typically scheduled within a week of your written approval. Every job starts with a camera-scan inspection, a written price, and a documented photo record - no exceptions, no surprises. If you own a DuraFlex liner and are seeing rust flakes in the firebox, draft issues on calm days, or you’ve been told your liner is “unfixable,” this page is for you. Call (267) 327-4785 to book a free estimate or bring us a competitor’s written quote for a free second opinion.
How DuraFlex Products Fail - and How We Fix Them
- DuraFlex SW (stainless smooth-wall) develops circumferential cracking near the smoke chamber shoulder. The SW series uses a 316Ti stainless core with a corrugated outer wall for flexibility, but the transition to rigid smooth-wall creates a stress riser where creosote acids pool in Lansdale’s freeze-thaw cycles. We cut back to sound metal, install a custom-fabricated DuraFlex SW transition piece, and seal with high-temp refractory - not generic foil tape.
- DuraFlex Pro liners show premature weld corrosion at the collar joint. The Pro’s lighter-gauge construction saves on freight but the collar-to-body weld is exposed to direct flue gas if the top plate seal degrades. We see this often in Lansdale’s 1980s split-levels where original installers skipped the storm collar. Our fix: replace the collar with an OEM DuraFlex Pro component or a heavier-gauge aftermarket equivalent from Olympia Chimney, then reflash with a proper cricket if the chimney sits on the low side of the roof.
- DuraFlex AL (aluminum) liners delaminate when used with oil or gas appliances above their temperature rating. AL was marketed for gas-only but we find it retrofitted onto converted oil systems in older Lansdale homes near the train corridor. Aluminum oxide blooms white and flakes into the burner compartment. We pull the AL liner entirely and upsize to a 316Ti stainless DuraFlex SW or an equivalent Gelco flexible liner rated for the actual appliance.
- DuraFlex flexible liners collapse at unsupported offsets greater than 30 degrees. The manufacturer’s installation manual allows offsets but requires support every 4 feet - a step skipped in too many Lansdale attics where blown insulation hides the strap work. We run a new liner with proper offset boxes, document every support on camera, and stamp the photo record under Haven Standard Clause 4.
- DuraFlex top plates and termination caps corrode from the outside in. Lansdale’s wet springs and leaf debris trap moisture against 304 stainless hardware that was never meant for permanent exterior exposure. We replace with 316 stainless or copper components from Famco or Copperfield, matched to the existing flue diameter, and show you the old part before it goes in the truck.
Our DuraFlex Chimney Liner & Rebuild Process
- 1
Camera-scan inspection (NFPA 211 Level 2). Corrine’s crew runs a chimney camera from the firebox to the cap, recording liner condition, joint integrity, and clearance to combustibles. You see what we see. The camera doesn’t guess. Neither do we.
- 2
Written scope and price. We deliver a written price, written scope, and written warranty before any work starts - Haven Standard Clause 1. No verbal estimates, no “we’ll see how it goes.”
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Parts decision: OEM DuraFlex or quality aftermarket. We stock DuraFlex SW and Pro components through Haven’s buying network. If lead times stretch or the job calls for heavier gauge, we source equivalent 316Ti from Olympia Chimney or Gelco and document the substitution in your job file.
- 4
Liner replacement or rebuild. For liner-only jobs, we pull the old liner, inspect the terra cotta flue for spalling or missing mortar, and install the new system with proper supports and insulation per DuraFlex spec. Full rebuilds follow masonry tear-down, structural assessment, and rebuild with new liner integration.
- 5
Smoke test and draft measurement. We verify negative draft at the appliance collar and run a smoke pellet test to confirm no leakage at joints or the new top assembly. Readings go in your photo record.
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Cleanup, documentation, and 365-Day Done Right Promise. Your documented photo record is uploaded same day. If anything’s not right, we make it right - stamped on every job.
Before
AfterWhat DuraFlex Chimney Liner & Rebuild Costs in Lansdale
| Service | Typical Range | What Moves the Price |
|---|---|---|
| DuraFlex liner replacement (straight flue, single story) | $2,800 - $4,200 | Flue diameter, insulation wrap, top assembly material |
| DuraFlex liner replacement with offset or support repair | $3,600 - $5,400 | Offset box fabrication, attic access difficulty, framing repair |
| Partial chimney rebuild with new DuraFlex liner | $6,500 - $9,800 | Courses above roofline, crown condition, scaffolding needs |
| Full chimney rebuild with DuraFlex liner integration | $12,000 - $18,000 | Foundation condition, height, matching existing brick |
| DuraFlex collar/weld repair (localized) | $680 - $1,400 | Accessibility, extent of corrosion, parts availability |
These are real Lansdale market ranges based on jobs we’ve completed in Montgomery County - not national averages. Your exact price depends on what the camera shows. We don’t recommend work without photo evidence you can see for yourself, and we’ll tell you plainly when something can wait. Call (267) 327-4785 for a free estimate.
Why Lansdale Homeowners Call Level Two Chimney Lansdale for DuraFlex Work
We’ve inspected and cleaned more than 38,000 chimneys since 2009, every one with a written price before work started and a documented record when it was done. Corrine’s crew knows DuraFlex products from hands-on work across Lansdale - from the colonials near Merrick Road where creosote buildup is expected, to the newer construction toward Towamencin where improper liner sizing is the usual find. We’re not affiliated with DuraFlex; we’re an independent service provider who sources parts through Haven’s buying network to keep customer prices honest. If DuraFlex components are back-ordered, we pivot to HeatShield or Gelco equivalents without delaying your job. Background-checked, uniformed technicians. License number on every page. A text when your tech is on the way. And a live person answers the phone, 24 hours a day.
FAQs
No - DuraFlex warranties cover manufacturing defects, not installation or service by independent technicians. As an independent DuraFlex service provider, we use OEM or equivalent 316Ti components and document every step, so any valid manufacturing claim remains intact. We keep parts receipts in your job file for warranty support. Call (267) 327-4785 if you need help interpreting your original warranty language.
Most straight flue replacements are completed in one day; jobs with offsets, attic support repairs, or masonry prep typically run two days. We don’t promise same-day dispatch, but we do schedule within a week of your written approval for standard liner work and within two weeks for full rebuilds. You’ll get a written start date before you sign.
Localized collar corrosion, minor weld cracks, or top assembly damage can often be repaired. If the liner shows multiple cracks, wall thinning below 0.005 inch, or delamination of the AL series, replacement is the honest recommendation - and we’ll show you the camera footage that proves it. We don’t sell replacement when repair will last.
We stock common DuraFlex SW and Pro diameters in our Montgomery County warehouse. For less common sizes or the AL series, Haven’s buying network pulls from Olympia Chimney, Gelco, and Famco distribution - usually two to three business days. If your liner is actively leaking carbon monoxide or structurally compromised, we’ll install a temporary cap seal and schedule the permanent repair as parts arrive.
The camera decides. If the terra cotta flue is intact, the liner is the issue. If we find spalling brick, missing mortar joints, or a shifted chimney structure, the liner is a symptom and the masonry needs attention. We separate the two scopes in writing so you can phase the work if budget requires. Nothing is bundled or hidden. Call (267) 327-4785 for a free camera inspection - estimates are free, and the photo record is yours to keep.
Written by Corrine Halstead, Owner, Level Two Chimney Lansdale at Level Two Chimney Lansdale, serving Lansdale and nearby areas.