Gelco Flue Liner Replacement Nationwide

Gelco Flue Liner Replacement: The Austin Owner’s Guide

If your Gelco flue liner has cracked, warped, or separated, we carry compatible Gelco replacement sections and complete liner kits on our trucks, and a full replacement in Austin typically runs $1,400 to $2,800 installed depending on liner diameter, flue height, and roof access. Most Austin homeowners discover the problem one of two ways: during a chimney inspection that shows flue tile damage behind the Gelco liner, or when they start seeing rust flakes and moisture in the firebox after a heavy Central Texas rain. Tell me what you’re seeing, and I’ll tell you what it actually means.

Call (361) 420-8585

Which Gelco Models This Applies To

Gelco makes stainless steel chimney liners in a range of diameters, but the compatibility question is almost always about the inner diameter, not the model name. The liners we replace most often across Austin are the 5.5-inch, 6-inch, and 8-inch Gelco sections, and the gotcha is that Gelco’s 6-inch liner does not always seat cleanly inside an older 8-inch clay tile flue without a tee connector adjustment. You can confirm what you have by looking for the stamped ID on the liner’s top edge or checking the appliance collar where it connects to your furnace, water heater, or fireplace insert. Alcott Chimney Austin is an independent service provider and not affiliated with Gelco, which matters because we’re free to recommend exactly what your setup needs, whether that’s a factory-matching Gelco section or a higher-grade equivalent from DuraFlex or HeatShield that outlasts the original.

Signs Your Gelco Flue Liner Replacement Is Failing

• Rust flakes or metallic debris in the firebox: Gelco liners are stainless, but the seams and connectors can corrode first, especially in Austin’s humid spring months when condensation sits inside an unused chimney for weeks.
• Backdraft or smoke rolling into the room: A cracked liner loses the draft seal that pulls combustion gases up and out. You’ll notice it most on days when the fireplace is working against a warm Austin afternoon outside.
• Soot stains appearing on walls near the chimney chase: This means exhaust is escaping somewhere it shouldn’t, often through a failed liner seam behind drywall where you can’t see the damage.
• Water dripping or staining around the damper: When a liner cracks, roof leaks that would normally channel down the flue instead find their way into the firebox and onto your hearth floor.
• A metallic pinging or ticking sound during heating cycles: As a damaged Gelco liner expands and contracts, loose seams and cracked sections make small metal-on-metal noises, a telltale sign it’s time for a replacement.

Replacement Cost & What’s Included

For Austin homes, a full Gelco flue liner replacement typically runs $1,400 to $2,800 installed. That range accounts for liner diameter (larger 8-inch liners cost more in materials), flue height (a two-story chimney in Barton Hills costs more than a single-story in Hyde Park), and roof access (steep pitches and tile roofs add labor). You’ll get a written price before any work starts, always itemized so you can see the liner cost, the tee connector, the top plate and cap, and the labor on separate lines. Every replacement carries our written guarantee, and under the 365-Day Done Right Promise, if the liner fails within a year, we return and make it right at no charge.

DIY or Call Us?

You can safely inspect the visible portions of your Gelco liner from inside the firebox with a flashlight, looking for obvious cracks, separation at the seams, or rust staining. What you shouldn’t do is attempt a liner swap yourself. Working with a liner means working on the roof, pulling sections through a flue that may have sharp clay tile edges, and making connections that must hold against carbon monoxide. A dropped liner section can damage the flue tile, and an improperly seated connection can push exhaust into the house. If you’ve spotted the signs, call us at (361) 420-8585 and we’ll send a tech who knows Gelco systems cold.

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