Gelco Flue Liner Replacement Nationwide

Gelco Flue Liner Replacement: The Marietta Owner’s Guide

Gelco flue liner replacement in Marietta typically runs $850 to $1,900 installed, depending on the liner diameter, the height of your chimney, and how difficult the access is. We stock Gelco-compatible liner systems on our trucks and complete most replacements in a single visit. Here’s the reality we see most often in Marietta: a homeowner notices rust flakes at the base of the fireplace, or a chimney inspection shows gaps and separation in the liner joints. Gelco liners are solid products, but the Georgia humidity and decades of thermal cycling eventually take their toll on any metal liner.

Call (762) 249-4619

Hadley Chimney Marietta is an independent chimney service provider. We install and replace Gelco flue liners, but we’re not affiliated with Gelco as a manufacturer. What that means for you: we’ll tell you straight what’s actually failing, send a photo before we recommend anything, and use parts built for the job rather than whatever’s cheapest on the shelf.

Which Gelco Models This Applies To

Gelco builds flue liners in a range of diameters and alloy grades. The most common ones we pull out of Marietta chimneys are the standard 316L stainless steel flexible liners, sized anywhere from 4 inches to 8 inches in diameter. If you have an older Gelco liner, it may be a 304-grade alloy, which holds up moderately well but corrodes faster in Georgia’s humid, acidic flue environment than 316L does. The compatibility gotcha most homeowners hit: Gelco liner components are sized by inside diameter, not outside. Measure the existing liner’s inner opening before ordering any replacement couplers, tees, or caps. A 6-inch Gelco liner from 2008 will not necessarily mate cleanly with a 6-inch liner from a different manufacturer, because wall thickness and corrugation patterns differ. We recommend OEM Gelco or a direct equivalent for any section you’re replacing, rather than mixing brands mid-run. That’s how you end up with gas leaks at the joints.

We also stock and work with DuraFlex and HeatShield systems when a Gelco-specific part isn’t the right call. DuraFlex is our go-to for full relines. HeatShield is the better option when the existing clay tile is mostly intact and the fix is a resurfacing rather than a full metal liner swap. But when the part that failed is Gelco, we match it.

How to Identify Your Gelco Liner

• Check the cap and crown area: The top plate or rain cap often has a manufacturer stamp or label. If it’s legible, it’ll say Gelco and sometimes a size.
• Measure the inside diameter: From the flue opening, measure across the inner opening of the liner in inches. That’s the number you need.
• Note the alloy: If you have original paperwork or the liner has a visible stamp, look for 304 or 316. This tells us how much life is left and whether a partial patch is even worth attempting.

Signs Your Gelco Flue Liner Replacement Is Failing

• Rust flakes or metal fragments falling into the fireplace. This is the symptom we hear about most often in Marietta homes. It means the liner wall is thinning from the inside out, usually from acidic condensate eating at the metal. By the time flakes show up, the liner has been compromised for a while.
• A smell of smoke or gas in rooms near the chimney, even when there’s no fire burning. This points to gaps or holes in the liner letting flue gases seep into the house. Carbon monoxide is invisible and odorless, so any combustion smell should be taken seriously.
• Visible separation at the liner joints. Gelco liners are made in sections. If the joints separate, you’ll see it on a camera inspection as a dark gap in an otherwise smooth line. In older Gelco installs, flimsy couplers were sometimes the failure point, not the liner walls themselves.
• White crusty deposits on the outside of the liner or inside the chimney chase. This is condensate working its way through micro-perforations. Georgia’s swing between humid summers and damp winters accelerates this, especially on liners venting gas appliances rather than wood.
• Your chimney sweep finds stage 3 creosote (the flammable tar buildup that makes chimneys a fire risk) and notes the liner surface is rough or pitted. A smooth liner resists creosote adhesion. Once the wall is pitted and uneven, creosote grabs on faster, and suddenly your liner is a fire hazard instead of a fire shield.

Replacement Cost & What’s Included

Here’s what we quote for Gelco flue liner replacement in Marietta, and what actually drives the price.

The biggest price drivers in Marietta are roof pitch (some of those older homes near the Square have steep angles that make staging harder) and liner diameter (an 8-inch run costs noticeably more in materials than a 6-inch). You’ll get a written price before any work starts, and every repair includes a 365-day written guarantee. If the liner fails within that window, we make it right, including a free second visit.

DIY or Call Us?

Here’s the honest split. You can safely check the visible condition of your liner from the fireplace side: look for rust flakes, run a flashlight up the flue, and check for any visible gaps where sections meet. You can also inspect the cap and top plate from ground level if it’s safe to do so. What you should not do is attempt to remove, patch, or replace any section of a flue liner yourself. This is a gas-carrying component running through the interior of your house. A bad seal at a joint means carbon monoxide can enter living spaces. Working on a roof with a 25-foot flexible liner also puts you on a ladder with a heavy, awkward length of steel. That’s not a weekend project. If you’ve confirmed or suspect a Gelco liner failure, call us at (762) 249-4619. We’ll camera-inspect it, send you the photo, and show you exactly what we’re seeing before you spend a dollar.

Can You Fix It Same Day?

Most partial Gelco liner section replacements are done in a single visit, usually 2 to 4 hours depending on access. For a full reline, we book a full morning or afternoon. We don’t promise same-day dispatch, but we do arrive in a tracked window with a live arrival time. You’ll know who’s coming, when they’ll be there, and what the job costs before we ring your doorbell. Cory Mitchell has been doing this long enough to know that the first question any Marietta homeowner asks is “when can you actually get here and what’s it going to cost.” We answer both up front.

FAQs

Talk to a Person, Get a Straight Answer

If your Gelco flue liner is showing signs of failure, or if you just want a second set of eyes on it, call Hadley Chimney Marietta at (762) 249-4619. A live person answers, 24/7, not an answering service. We’ll schedule a time that works, arrive in a tracked window, and send before-and-after photos so you can see exactly what we saw and what we did. That’s the Relay Visibility Guarantee, and it’s how every job works around here.

Written by Cory Mitchell, Owner, Hadley Chimney Marietta at Hadley Chimney Marietta, serving Marietta and nearby areas.