Gelco Flue Liner Replacement Nationwide

Gelco Flue Liner Replacement: The Leesburg Owner’s Guide

We stock and install Gelco-compatible flue liner replacement in Leesburg, with most jobs running $1,800 to $3,400 installed depending on chimney height, diameter, and whether the existing liner pulls out cleanly. Gelco’s 316Ti stainless and aluminized models are common in the Loudoun County market, and we carry the full diameter range from 3 to 10 inches on our trucks. Most Leesburg homeowners discover the problem mid-season: a smoky fireplace, water in the firebox, or a sweep’s camera showing gaps or corrosion they never knew was there.

Call (571) 701-7519

Which Gelco Models This Applies To

Gelco produced several liner series over the years, and the part you need depends on what’s already in your chimney. The Gelco UltraPro 316Ti flexible liner, their aluminized economy line, and the older Gelco rigid sectional systems each require different replacement approaches. Check the collar plate at the top of your chimney or any remaining installation paperwork for a model stamp; if that’s gone, we measure the inner flue diameter and liner wall thickness to match the correct gauge.

Here’s where Leesburg owners get tripped up. The Gelco flexible liners use proprietary collar and termination fittings that don’t interchange with DuraFlex or Olympia Chimney hardware without an adapter. We’ve seen homeowners in the Potomac Station area order generic 6-inch liner online only to find the top plate won’t seat. We carry both OEM Gelco fittings and precision-matched aftermarket equivalents from our regular stock; the aftermarket saves roughly 15% and carries the same 316Ti spec, but we’ll tell you exactly which route we’re taking before we order.

Hearthstone Chimney Co. is an independent service provider, not affiliated with Gelco. We work with their products because they’ve held up well in our local market, not because anyone requires us to.

Signs Your Gelco Flue Liner Replacement Is Failing

• Smoke backing up into the room. A separated liner joint or corrosion hole breaks the sealed flue path, especially under the drafting stress of a Leesburg cold snap. The smoke has to go somewhere, and the path of least resistance is your living room.
• Water in the firebox after rain. Gelco liners include a termination cap designed to shed water; when the liner shifts or the cap seal fails, water tracks down the flue wall. In our wet Virginia shoulder seasons, this accelerates rust at the connector.
• White or orange staining on the liner walls. That’s creosote leaching through pinholes or gaps in a compromised liner, often first visible on camera inspection. The stain is a warning; the hole behind it is the problem.
• Acrid, chemical smell when the fireplace is cold. Combustion gases seeping through liner gaps collect in the smoke chamber and chimney cavity, then drift down on temperature inversion days. Carbon monoxide risk is real here; this symptom means call now, not later.
• Visible gaps or sag in the liner revealed during sweeping. Gelco flex liner can sag at mid-chimney support points after 15 to 20 years of heat cycling, especially in taller Leesburg colonials with exterior chimneys that see wider temperature swings.

Replacement Cost & What’s Included

For a typical Leesburg single-story home with a straight chimney run, Gelco flue liner replacement runs $1,800 to $2,600. Two-story homes, offset chimneys, or the need to remove a stuck existing liner push the range to $2,800 to $3,400. That includes the liner itself, top termination, bottom connector, insulation wrap where code requires it, and full labor to remove and replace.

What drives the spread: chimney height, whether we can pull the old liner in one piece, and whether your chimney needs a new top plate or crown repair to seal properly. We price this upfront after a Level-2 camera inspection, not after we’ve started. The number on the estimate is the number on the invoice. Every liner replacement carries our 90-Day Done Right Promise in writing, no arguing, and the liner material itself carries the manufacturer’s warranty against defects.

DIY or Call Us?

There’s a safe middle ground here. You can verify your chimney diameter with a tape measure, check the model stamp on your existing collar, and confirm whether water is actually entering the flue with a flashlight during rain. What you should not do: climb a roof to pull a liner, work inside a flue without proper ventilation, or attempt to cut and fit stainless liner without the correct tools and seam technique. The liner is your chimney’s firewall; a gap or unsupported section creates a path for chimney fire to reach framing. We’ve rebuilt too many Leesburg chimneys after well-meaning DIY went wrong.

Our technicians carry Gelco-compatible liner on the truck, background-checked and uniformed, and most replacements complete in a single visit once estimated. Call (571) 701-7519 and we’ll walk through what you’re seeing.

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