Flue relining
Sweep & inspection
Caps & crowns
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 Flue Liner Replacement: The Long Beach Owner’s Guide
We stock and install DuraFlex-compatible flue liner replacement sections in Long Beach, with most complete liner swaps running between $1,800 and $3,400 installed depending on flue height, liner diameter, and access. We keep common 316L alloy DuraFlex sections on our trucks, so a straightforward replacement is often done in a single visit. Most Long Beach homeowners discover the problem during an annual sweep or inspection, when the camera shows a seam separation, a crack near the appliance connector, or corrosion that’s thinned the liner wall past safe tolerance.
Key Takeaways:
- DuraFlex is a flexible 316L stainless steel liner system; we match diameter, gauge, and connection type to your existing setup.
- Installed replacement in Long Beach typically runs $1,800 – $3,400, with a written price before work starts.
- We’re an independent chimney service company, not affiliated with DuraFlex, but we work with their parts daily.
- Every repair carries our 365-Day Done Right Promise, in writing, for one full year.
Which DuraFlex Models This Applies To
DuraFlex liners come in two main series: the standard 316L alloy for wood stoves and gas appliances, and the 316L “Pro” with a higher nickel content for high-efficiency gas furnaces that run hotter and produce more acidic condensation. The compatibility gotcha most people miss: a DuraFlex liner labeled for wood use isn’t rated for a high-efficiency gas appliance. We check the appliance tag and the original liner’s stamp before we quote anything.
DuraFlex uses a smooth inner wall with a corrugated outer wall, and sections connect with a male-female locking coupling. If your liner was installed before 2015, there’s a good chance it has the older snap-lock coupling rather than the current twist-lock design. That matters because the two aren’t interchangeable. When we do a partial replacement in Long Beach, we verify the connection style before cutting anything. For full relines, we use new twist-lock DuraFlex sections sized to the flue’s interior diameter, typically 4, 5, 6, or 8 inches. The liner wall thickness runs 0.005 to 0.006 inches, which sounds thin but is standard for flexible stainless systems.
We also work with HeatShield and Gelco products when the application calls for them, but for a straightforward DuraFlex-to-DuraFlex swap, we stay with DuraFlex unless the liner has failed prematurely and we recommend a different material for the conditions.
Styles & brands we work with
Signs Your DuraFlex Flue Liner Replacement Is Failing
- Flaky rust or discolored metal visible at the flue opening. 316L stainless resists rust, but it’s not rustproof forever. In Long Beach’s marine air, we see surface corrosion start around year ten, and by year fifteen, pinholes can open in the seams. Once pinholes appear, the liner can’t do its job.
- Water or condensation stains running down the outside of the chimney chase. A failed seam lets moisture seep into the flue cavity. Inside the house, this often shows up as damp drywall around the fireplace chase on the upper floor.
- A sulfur smell in the room after the appliance runs. If the liner has a breach, combustion gases can flow backward into the living space instead of venting up and out. This isn’t a smell to investigate by running the appliance again.
- Hissing or a visible gap at the appliance connector. The connector is the transition piece between the liner and the stove or furnace. It’s the highest-stress point in the system, and it’s where we find most failures on DuraFlex installations in Long Beach, particularly on stoves that get used heavily all winter.
- Soot buildup that’s black and oily rather than dry and powdery. This points to incomplete drafting, meaning exhaust isn’t moving efficiently through the liner. It’s often the first sign of a liner that’s started to bulge or separate internally.
Replacement Cost & What’s Included
For a full DuraFlex flue liner replacement in Long Beach, we quote installed prices from $1,800 to $3,400. A straight single-story flue with easy roof or chase access lands near the low end. A two-story home with a steep roof, tight chase clearance, or an existing liner that has to be extracted piece by piece pushes toward the high end.
What drives the range isn’t mystery margin; it’s labor hours, liner length, and diameter. A 6-inch-by-25-foot DuraFlex liner section itself runs roughly $350 to $500 in materials, depending on the exact model and coupling style. The rest is removal of the old liner, prep work, installation, and testing the draft before we leave.
Every quote gets written down and handed to you before any work starts. The number on the invoice is the number you approved. The repair includes our 365-Day Done Right Promise: if the liner fails within a year of the service date, we return and make it right at no charge.
See the difference
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After
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AfterDIY or Call Us?
What you can safely do: inspect the visible section of the liner at the fireplace opening with a flashlight, check the appliance connector for obvious gaps, and note any new water stains on ceilings or walls near the chimney. That’s a reasonable homeowner inspection.
What you shouldn’t do: pull the liner, cut new sections, or reseat the appliance connector yourself. A flue liner isn’t a high-tension component like a garage door spring, so the danger isn’t the part itself. It’s the job site. You’re on a roof or working inside a chase, the liner sections are awkward, and the connection points need to seat correctly or you’ve created a carbon monoxide pathway into the house. This is one repair where the mistake doesn’t show up until the appliance runs again.
If you want us to handle it, call (562) 317-7262. We’ll schedule an inspection, put eyes on the liner with a camera, and give you a written price. No hidden add-ons.
FAQs
In our experience with coastal air in Long Beach, a 316L DuraFlex liner typically lasts 15 to 20 years when the chimney is swept annually and the appliance is properly sized. The marine humidity accelerates surface corrosion compared to inland climates, so we don’t see the 25-plus-year lifespans that drier regions get.
Sometimes. If the failure is at the appliance connector or a single coupling joint, we can often replace just that section or reseat the connection. If the liner has multiple pinholes, seam separation, or thinning across more than a couple of feet, the honest answer is a full replacement. We’ll show you the camera footage so you can see exactly what we’re seeing.
A straightforward full replacement in a single-story Long Beach home usually takes four to six hours from setup to cleanup. A two-story home with difficult access can run most of a day. We’ll give you a time window when we book the job and we hold to it.
Yes. We carry common DuraFlex diameters and coupling styles on our trucks, so most replacements don’t require a second visit for parts. If you need an uncommon size, we can order it and have it in hand before we start the job.
Call Flint Chimney Co Long Beach for DuraFlex Liner Replacement
If your DuraFlex flue liner is showing signs of failure, call (562) 317-7262 for a free estimate. Hank Delano and his crew have been running sweeps and inspections in Long Beach for years, from older Craftsman homes in Belmont Heights to newer builds near the waterfront. We’ll inspect the liner, show you what’s going on, and put a written price in your hand before any work begins. Clean flue, honest report; that’s the whole job.
Written by Hank Delano, Owner, Flint Chimney Co Long Beach at Flint Chimney Co Long Beach, serving Long Beach and nearby areas.