Gelco Flue Liner Replacement Nationwide

Gelco Flue Liner Replacement: The Fort Worth Owner’s Guide

We stock and install Gelco-compatible flue liner replacement in Fort Worth for $2,800-$4,200 installed, depending on liner diameter, chimney height, and whether the existing liner is stainless or aluminized steel. Most Gelco liner jobs in the 76107, 76116, and 76132 ZIP codes are completed in a single day once the written estimate is approved. You’ll usually discover the problem during a routine sweep or when you spot rust flakes in the firebox, water staining on interior walls near the chimney breast, or a persistent smoke smell that doesn’t clear with a window open.

Call (682) 499-2712

Which Gelco Models This Applies To

Gelco flue liners fall into two main series: the Gelco UltraPro (stainless, .006″ wall, lifetime warranty) and the older Gelco Standard (.005″ wall, 20-year warranty), plus the Gelco Pro-Flex flexible liner kits sold through specialty distributors. The label is usually stamped on the collar at the top of the liner or on a tag left by the original installer near the damper. If you can’t find it, measure the inner diameter with a tape measure across the flue opening, not the outer collar, and note whether your chimney is straight or has offsets.

We source Gelco replacement liners through Haven’s buying network alongside DuraFlex and HeatShield equivalents. For most Fort Worth homes built between 1960 and 1995 with original clay flue tiles, the Gelco UltraPro 316Ti stainless is the direct OEM match. We also carry aftermarket 316Ti from Olympia Chimney that meets the same ASTM standards at a lower price point, which we’ll quote side by side in writing before you decide. The gotcha: Gelco Pro-Flex uses a proprietary collar dimension, so a generic flex liner won’t seat properly without an adapter that adds $180-$240 to the job.

Signs Your Gelco Flue Liner Replacement Is Failing

• Rust-colored water stains on the firebox floor or adjacent drywall. Gelco aluminized liners corrode from the outside in when condensation mixes with creosote, especially in Fort Worth’s humidity swings between March and June. By the time you see rust inside, the liner wall is already thinned.
• Flakes of metal or tile fragments during routine cleaning. These are pieces of the liner wall spalling off. With Gelco stainless, this usually means the liner was oversized for the appliance and has been overheating, or the installer skipped the required insulation blanket.
• Smoke rollout when opening the firebox door, even with a good draft. A breached Gelco liner lets exhaust leak through gaps into the chimney cavity, then back into the room. This is a carbon monoxide pathway, not just a nuisance.
• White efflorescence or salt deposits on exterior brick below the roofline. Combustion gases escaping a failed liner condense inside the masonry, carrying acidic moisture through the brick face. In Fort Worth’s clay-heavy soils, this accelerates freeze-thaw spalling faster than in drier climates.
• Your sweep refuses to certify the chimney for use. Under NFPA 211, a liner with any through-wall corrosion, separation at joints, or more than 25% circumference damage fails Level 2 inspection. We document this with camera footage and show you the exact frame.

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Replacement Cost & What’s Included

The range depends on three things: liner diameter (5.5″ to 8″ are common for Gelco), whether we can pull the old liner in one piece or have to break it out in sections, and if the chimney top needs reframing for a new top plate. We deliver a written scope, written price, and written warranty before any work starts, Haven Standard Clause 1. The 365-Day Done Right Promise covers the installation. Materials carry the manufacturer’s warranty, 20 years to lifetime depending on the liner series.

DIY or Call Us?

There’s exactly one thing a homeowner can safely check: shine a flashlight up the flue from the firebox and look for daylight through holes, heavy rust scaling, or gaps where liner sections meet. Do not attempt to remove or replace a flue liner yourself. The work requires working at height on a steep roof, handling sharp stainless edges, and properly sizing combustion air for the appliance, a mistake that can pressurize a furnace and backdraft carbon monoxide into living space.

We carry Gelco-compatible liner on the truck for most common diameters, and Corrine Halstead’s crews have replaced liners in Fort Worth homes from the Cultural District to Wedgwood since 2009. The camera doesn’t lie, and neither does the written estimate. Call (682) 499-2712 for a free estimate with camera inspection included.

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