Gelco Flue Liner Replacement Nationwide

Gelco Flue Liner Replacement: The Dallas Owner’s Guide

Gelco flue liner replacement in Dallas typically runs $1,800-$3,400 installed for a standard single-flue system, depending on diameter, height, and whether the chase top needs resealing after we pull the old run. We stock Gelco-compatible stainless steel liner in 6-inch and 8-inch diameters on our Dallas trucks, and most replacements are completed in a single day once the camera inspection confirms the scope. You’ll know the exact price before we start - Clause 1 of the Haven Standard requires it in writing.

Call (972) 284-1392

Most Dallas homeowners discover their Gelco liner has failed during a routine sweep or when they spot water staining on the chase interior after a hard rain. In neighborhoods like Lake Highlands and Preston Hollow, where fireplaces see heavy use through our brief but sharp winters, the thermal cycling accelerates the hairline fractures that start at the liner seams.

Which Gelco Models This Applies To

Gelco manufactured several liner series over the years, and the replacement strategy depends on which one is in your chase. The Gelco UL-Listed stainless steel flexible liner, common in Dallas homes built between 1985 and 2010, carries a part number stamped on the top collar or on a tag near the thimble connection. If that tag is corroded off, we measure the inner diameter with a caliper and check the wall thickness - Gelco original spec is .006-inch 316Ti stainless for wood-burning applications, though some later production shifted to .005-inch for gas-only installs.

The compatibility gotcha in Dallas: Gelco’s early 1990s “SmoothWall” series used a proprietary top plate with a 12-inch overhang that doesn’t mate to standard current collars. We’ve got those plates in our Haven buying network, but they have to be ordered - not truck stock. For everything else, we source direct-fit Gelco replacement or equivalent 316Ti alloy from our DuraFlex and HeatShield supply lines, whichever gets you the honest price. We’re an independent service provider - not affiliated with Gelco - so we match the part to your system, not the brand to our shelf.

Signs Your Gelco Flue Liner Replacement Is Failing

• White efflorescence or rust streaks on the exterior chimney brick. This means exhaust gases are escaping through liner breaches and condensing in the masonry. In Dallas, where humidity swings 40 points between January and July, that moisture drives accelerated spalling on the firebox rear wall.
• Bits of stainless steel in the firebox or cleanout. Those flakes are the liner wall corroding from the inside, usually where creosote sat too long. Gelco’s 316Ti resists acid well, but Class III glazed creosote wins every time if it’s not swept annually.
• Smoke rollout when opening the firebox door. A liner with separated seams or collapsed sections can’t maintain proper draft. We see this most in two-story Dallas homes where the original 20-foot liner run has sagged at the mid-chase joint.
• Damp, tar-like odor from the fireplace in summer. That’s creosote emulsifying with humid air through a liner gap. It means the liner’s integrity is compromised enough that ambient air is cycling through the flue, not just exhaust during burns.
• The neighbor’s chimney sweep already condemned it. We offer a free second opinion on any written estimate - bring us their scope and photos. Half the “total liner failure” diagnoses we review in Dallas are localized seam separations that don’t require full replacement.

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Replacement Cost & What’s Included

What drives the range: height of the chase (two-story vs. three-story), whether we can pull the old liner without dismantling the chase top, and if the connector pipe from appliance to liner needs replacement too. Every quote breaks these out line by line - no lump-sum mystery. The work carries our 365-Day Done Right Promise, and the photo record from the camera scan goes to you same day under Haven Standard Clause 4.

DIY or Call Us?

There’s a safe middle ground here. You can check the cleanout for debris, confirm the damper opens fully, and verify the chimney cap isn’t clogged - none of that risks injury or code violation. But pulling a flue liner means working at height on a Dallas roof that can hit 140°F surface temperature in August, handling sharp stainless edges, and properly sizing the replacement to NFPA 211 clearances. Get the diameter wrong by half an inch and you’ve got an uninsurable installation.

Camera goes in first. Everything else follows. That’s how we know whether you’re looking at a localized repair or a full pull-and-replace before we quote either. Call (972) 284-1392 and we’ll get a named tech assigned - you’ll get a text when they’re on the way, license number included.

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