Famco Flue Liner Replacement Nationwide

Famco Flue Liner Replacement: The Ashburn Owner’s Guide

Famco flue liner replacement in Ashburn typically runs $1,800 to $3,400 installed, depending on chimney height and whether the liner is rigid or flexible stainless steel. We stock Famco-compatible liners in common diameters from 5 to 8 inches and can usually inspect, measure, and schedule installation within a few days. Most Ashburn homeowners discover the problem during a routine sweep when our camera spots cracked terracotta, corrosion pinholes, or gaps at the collar where the liner meets the thimble.

Call (571) 701-8135

Which Famco Models This Applies To

Famco built flue liners across several product lines over the decades, and the label location matters more than most owners expect. You’ll find the model stamp on a metal tag near the top collar or embossed directly on the stainless collar itself, often faded after years of heat cycling. The 3000 series rigid liners, common in Ashburn homes built between 1985 and 2005, used a 24-gauge 304 stainless with a distinct double-seam joint that newer 316Ti flexible liners won’t mate to without an adapter. The 5000 series flexible liners, found in tighter flues around Belmont Ridge and the older sections off Waxpool Road, require a different top plate geometry.

We carry both OEM Famco termination hardware and quality aftermarket equivalents from Olympia Chimney and Gelco that meet the same UL 1777 listing. The aftermarket collars often outlast original Famco hardware because they use a heavier-gauge storm collar. One compatibility gotcha we’ve seen twice in Ashburn: a 6-inch Famco liner in a 12×12 flue sometimes needs a custom-fabricated top plate because modern universal plates assume a smaller annular space. We measure before we order. Hearthstone Chimney Co. is an independent service provider, not affiliated with Famco.

Signs Your Famco Flue Liner Replacement Is Failing

• White or orange staining on the exterior brick below the roofline. This means exhaust gases are condensing and migrating through gaps in the liner, carrying acids that etch the mortar. In Ashburn’s freeze-thaw cycles, that moisture expands and accelerates crown failure.
• A tar-like or acrid smell when the fireplace is cold. Creosote is collecting in liner gaps or offset joints where airflow stalls. Famco’s older flexible liners with corrugated walls trap more residue than smooth-wall designs when they sag.
• Visible cracks or spalling in the terracotta flue tiles. If your chimney was originally clay-lined and a Famco retrofit liner was added later, the clay is now structural backup. Once it fails, the liner carries all loads alone and can deform.
• Rust flakes or metallic debris in the firebox. 304 stainless corrodes from the outside in when acidic condensation sits between liner and clay. We’ve pulled Famco liners in Ashburn with paper-thin sections above the smoke chamber where condensation pools.
• Carbon monoxide detectors triggering near the hearth. This is the one that stops being optional. Even small liner gaps can backdraft under certain pressure conditions, especially in tighter modern homes near One Loudoun with powerful kitchen exhaust fans.

Replacement Cost & What’s Included

What moves the needle: chimney height above roofline, whether we need to remove an existing damaged liner first, and if the flue has offsets that require flexible liner rather than rigid. Two-story colonials off Ashburn Road with straight flues land on the lower end. Homes with a 45-degree offset near the smoke chamber, common in some 1990s builds off Loudoun County Parkway, need flexible liner and more labor.

Every replacement includes our Level-2 camera inspection before and after, photos you can see, and a plain-English verdict on whether your damper and smoke chamber need attention while we’re there. The 90-Day Done Right Promise covers the installation in writing, no arguing. We also apply our permanent 5% Senior and Veteran discount to any liner job.

DIY or Call Us?

There’s a safe middle ground and a hard stop. You can verify your liner diameter with a tape measure from the firebox, check the metal tag for model hints, and confirm whether your chimney has one flue or two. What you cannot safely do is drop a new liner yourself. The work involves working at height on a steep roof, handling 20-foot rigid sections or a coiled flexible liner that fights back, and sealing the top plate with proper high-temp sealant while leaning over a chimney.

More critically, a liner installed without proper insulation or with gaps at the collar creates the exact carbon monoxide risk you’re trying to solve. We’ve been called to Ashburn homes where a handyman’s liner replacement looked fine from the firebox but had a half-inch gap at the top that vented into the attic for two years. The flue doesn’t lie - and neither do we. If you suspect your Famco liner is failing, call (571) 701-8135 and we’ll give you a straight answer on whether it needs replacement now or can wait until your next scheduled sweep.

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