Gelco Flue Liner Replacement Nationwide

Gelco Flue Liner Replacement: The Bellevue Owner’s Guide

Gelco flue liner replacement in Bellevue typically runs $2,800-$4,200 installed for a standard wood-burning chimney, depending on liner diameter and height. We stock Gelco-compatible stainless steel liners and connectors for same-day installation on most Bellevue homes, including the common 6-inch and 8-inch diameters used in Lakemont and West Bellevue builds from the 1980s and 90s. Most owners discover the problem during a sweep when the camera reveals cracked terracotta, corrosion pinholes, or separation at the collar joint where Gelco’s clamp-band system meets the flue.

Call (425) 696-0387

Which Gelco Models This Applies To

Gelco flue liners fall into two main series you’ll find in Bellevue: the original Gelco stainless flexible liners (marked with a stamped “GELCO” band every 36 inches) and the later Gelco-Pro line with the blue silicone collar gasket introduced around 2012. The critical compatibility gotcha is the collar diameter: original Gelco used a 12.5-inch top plate opening, while Gelco-Pro shifted to 13 inches. Measure yours before ordering anything.

We source replacement liner through Haven’s buying network from Gelco, DuraFlex, and Olympia Chimney. OEM Gelco liner is available but carries a 6-8 week lead time in most cases. We typically install Olympia Chimney’s 316Ti stainless equivalent, which matches Gelco’s .006-inch wall thickness and carries the same UL 1777 listing. The difference you’ll notice is price: the Olympia equivalent runs 15-20% less, and we can have it on your roof tomorrow instead of next month. If your existing Gelco liner is under 10 years old and failed due to material defect, we’ll flag that for potential manufacturer warranty submission.

To identify your liner, check the metal tag at the top termination or the stamp bands visible during a camera inspection. Bring us that model prefix (GL-, GP-, or GPC-) and we can cross-reference the exact diameter, length, and insulation spec.

Signs Your Gelco Flue Liner Replacement Is Failing

• White efflorescence or rust streaks on the exterior brick. This means moisture is getting past the liner wall, usually through pinhole corrosion at the flex points where the Gelco liner bends to navigate the smoke chamber. In Bellevue’s wet season, that moisture freezes, expands, and accelerates the damage.
• Flakes of terracotta in the firebox after burning. Your original clay liner is disintegrating behind the Gelco insert, which happens when the Gelco liner was undersized for the appliance and overheated, or when the top seal failed and water saturated the surrounding masonry.
• Smoke rollout when opening the loading door. The liner may have separated at a joint or collapsed at a crease, creating a blockage. Gelco’s clamp-band joints are reliable but can loosen if the initial installer didn’t torque to spec or used the wrong band for the liner series.
• A sudden creosote odor in the house, even when not burning. This indicates a breach in the liner allowing exhaust gases into the chimney cavity. With Gelco’s flexible liner, the failure point is almost always at the top collar or the first bend above the smoke chamber where condensation pools.
• The appliance “works harder” to draft, or backdrafts on windy days. The liner interior may be glazed with pyrolyzed creosote (Class III, rock-hard) or partially collapsed. Gelco’s corrugated interior can trap creosote in the valleys if burning habits or fuel quality were poor.

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After

Replacement Cost & What’s Included

What drives the range: liner diameter and length, roof pitch and accessibility (Bellevue’s hillside lots in Somerset and Clyde Hill add ladder time), whether the existing liner can be extracted or must be demolished in place, and the condition of the top plate and crown. Every quote is written, itemized, and delivered before work starts - Haven Standard Clause 1. The 365-Day Done Right Promise covers the installation. Materials carry manufacturer’s warranty: 20 years on the Olympia 316Ti equivalent we most often install.

Documentation included: NFPA 211 Level 2 camera inspection before and after, photo record of every stage, written scope, written warranty. Clause 4 of the Haven Standard requires it, and we’ve done it on every job since 2009.

DIY or Call Us?

Here’s what you can safely check yourself: verify the liner diameter with a tape measure at the top termination, look for visible rust or separation at the collar joint, and confirm your appliance BTU rating against the liner sizing chart in your manual. What you cannot safely do: extract a failed liner from a two-story chimney, navigate the smoke chamber bend without damaging the surrounding masonry, or properly torque the clamp-band system that seals the liner top. The liner is not under spring tension, but the work involves ladder work at height, confined-space handling of sharp stainless edges, and combustion-zone sealing that affects carbon monoxide safety.

We pull the camera first, every time. The footage shows exactly where the failure is and whether the surrounding masonry can support a new liner without additional repair. Call (425) 696-0387 and we’ll book a Level 2 inspection with written pricing. Free Second Opinion on any competitor’s written estimate.

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