Gelco Flue Liner Replacement Nationwide

Gelco Flue Liner Replacement: The Dallas Owner’s Guide

We stock and install Gelco-compatible flue liners across Dallas, and a full replacement typically runs $2,100 to $4,800 installed depending on the liner length, diameter, and access from the roof. Most Gelco liner failures surface the same way: you notice flaking metal in the firebox, a faint smokiness in the house during burns, or a chimney inspection flags cracks and gaps in the liner walls. If you’re seeing any of these, the liner is not something to wait on. A compromised flue liner is the only thing standing between an 1,100-degree fire and the wood framing around your chimney chase.

Call (361) 492-4099

Flint Chimney Co Dallas is an independent chimney service company, not affiliated with Gelco. We work with Gelco products because they’re a proven name in the trade, but when a Gelco liner has reached the end of its service life, we’ll give you straight answers about whether it needs full replacement or can be patched with a quality repair. We’ll put that in writing before any work begins.

Which Gelco Models This Applies To

Gelco manufactures flexible stainless-steel chimney liners in a range of diameters and alloy grades, and the model stamped on your existing liner matters less than two measurements: the inner diameter of your flue tile and the total height from the appliance outlet to the chimney crown. We replace Gelco liners in 5.5-inch, 6-inch, 7-inch, and 8-inch diameters, with 316L alloy standard for wood-burning applications and 316Ti available where higher flue gas temperatures are a factor. The compatibility gotcha we see most often in Dallas homes: the original Gelco liner was sized for an open fireplace, but the homeowner later installed a wood stove insert that requires a smaller, insulated liner. If the liner diameter doesn’t match the appliance, you get poor draft and accelerated creosote buildup, no matter how clean the flue is.

When the original part number is still legible on the liner’s data tag (usually near the top connector), we can match it directly. More often than not, after 10 to 15 years of North Texas heat cycles, that tag is corroded or gone. In that case, we measure the flue and the appliance outlet and specify the correct Gelco liner on the spot. We also install DuraFlex and HeatShield liners for job-specific reasons, but if you had a Gelco liner and it served you well, we can keep you in a Gelco replacement.

Signs Your Gelco Flue Liner Replacement Is Failing

• Flakes of metal in the firebox or on the smoke shelf. This is the most common first sign. The thin stainless wall of an aging Gelco liner starts to delaminate and shed small pieces after years of thermal expansion and contraction. Once you see metal flakes, the liner has already breached.
• A smokiness in the living room even with the damper fully open. Gaps or cracks in the liner allow smoke to escape into the chimney cavity and find its way back into the house. It’s not your firewood, and it’s not the draft from the window.
• Visible rust streaks or water staining on the chimney chase or interior wall. A failing liner lets moisture and flue gases condense inside the chase. In Dallas, the spring storm season pushes a lot of water through even a small crack in the crown or flashing, and the liner catches the damage.
• A Level 2 chimney inspection (required during any real estate transaction in most Texas cities) flags stage 2 or stage 3 creosote plus liner deterioration. Sticky, baked-on creosote means flue temperatures are running too low, often because liner gaps are letting combustion gases cool before they exit. A liner replacement and a proper cleaning are both in order.
• You hear a faint hissing or rattling from the chimney on windy days. A compromised liner moves. The thin metal can shift inside the flue, and the noise is not normal masonry settling, it’s the liner telling you it has lost structural integrity.

Replacement Cost & What’s Included

A Gelco flue liner replacement in Dallas runs $2,100 to $4,800 installed. On the low end: a single-story chimney with easy roof access, a straight flue run under 15 feet, and no masonry repairs needed. On the high end: a two-story chimney, a liner length above 25 feet, the need for a flue tile expansion or removal, and repairs to the crown or cap. The liner itself is roughly 35 to 45 percent of the job cost; the rest is labor, access equipment, and the required Level 2 inspection before and after the install.

Here’s what every liner replacement gets you at Flint Chimney Co Dallas:

• Written price before any work starts. The number you approve is the number on the invoice. No upcharges added after we’re on the roof.
• New Gelco liner cut and sized to your exact flue dimensions. We don’t force a near-fit liner into a flue that needs a different diameter.
• A full written guarantee valid for one year from the service date. If the liner fails under normal use inside that year, we return at no charge, no argument.
• A documented post-installation camera inspection. You see the finished flue from the inside, and you keep the photos.

DIY or Call Us?

You can check a few things from the ground before you call. Look up the chimney with binoculars: any visible rust stains, cracked crown, or missing cap is a sign water has been getting in. Inside, shine a bright light up past the damper and look for flaking metal, gaps, or blockage. What you should not do is attempt a Gelco liner replacement yourself. This is not a drop-in job. The liner has to be sized precisely to the flue, and if the old liner is degraded, fragments may need removal without damaging the surrounding masonry. Working on a roof in Dallas, especially on a two-story chimney in the summer heat, is dangerous without proper fall protection and roof anchors. A dropped liner section will destroy a roof, and a tight flue pull can strain a chimney above ground level. We carry the right lifting equipment, and our technicians are background-checked and uniformed. They arrive in a marked vehicle, and they work from a written plan you’ve already approved.

If you’ve spotted the signs and want a straight answer, call us at (361) 492-4099. A live person answers, no phone tree. Hank Delano will be on site for the inspection and will walk you through exactly what your flue needs and what can wait.

FAQs

Call Flint Chimney Co Dallas for Gelco Liner Replacement

If you have a failing Gelco liner in Dallas, don’t guess, and don’t let another company tell you the whole chimney needs rebuilding without showing you proof. Hank Delano and our crew have cleaned and inspected chimneys across Dallas for years, including older homes near the M Streets where decorative masonry fireplaces are common and creosote buildup is a real seasonal problem. We diagnose what’s actually failing, we show you the camera footage, and we put the fix in writing before a single tool comes off the truck. Every repair carries our 365-Day Done Right Promise, a written guarantee valid for a full year. Call (361) 492-4099 for a free estimate, and you’ll reach a live person any hour, any day.

Written by Hank Delano, Owner, Flint Chimney Co Dallas at Flint Chimney Co Dallas, serving Dallas and nearby areas.