Famco Flue Liner Replacement Nationwide

Famco Flue Liner Replacement: The Gaithersburg Owner’s Guide

Famco flue liner replacement in Gaithersburg typically runs $1,800 to $3,400 installed, depending on liner diameter, length, and whether the old liner comes out clean or fights you. We stock Famco-compatible stainless liners on the truck and can usually complete the swap in a single visit. Most Gaithersburg homeowners discover the problem the way you just did: a rust stain on the basement floor, a fireplace that drafts weakly, or an inspection report with a photo that needs no explanation.

Call (240) 220-9395

If you’re reading this, you already know the liner is the metal sleeve running up the inside of your chimney. It’s the thing between the heat and the masonry. When it fails, you’re not looking at a cosmetic fix. You’re looking at a fire-safety repair, and the part itself is the core of the job.

Which Famco Models This Applies To

Famco makes stainless steel chimney liners in both rigid and flex configurations, and the model numbers matter more than most homeowners realize. The common Famco flex liners are sold in 4-inch, 5.5-inch, 6-inch, and 7-inch diameters, and they’re built to either 316L or 430 stainless alloy. 316L is what you want in Maryland. Our humidity cycles through freeze-thaw in January and damp heat in July, and 430 stainless does not hold up to condensate the way 316L does. We have pulled 430 liners out of Gaithersburg chimneys that looked like colanders after eight years.

Here’s the compatibility gotcha: Famco flex liners are not universal fit. The liner diameter has to match the appliance collar exactly, and for most wood stoves and inserts in this market, that means 6-inch. For oil furnaces, it’s usually 5.5-inch or 6-inch. For gas appliances, the sizing depends on the BTU rating and run length. If you’re not sure, look for the label on the old liner at the top of the chimney or check the appliance’s installation manual. If you can’t find either, we measure during the inspection and confirm before we quote.

We install Famco liners where the customer prefers that brand, and we also carry DuraFlex, HeatShield, and Gelco equivalents when the OEM price doesn’t make sense. Level Two Chimney Gaithersburg is an independent service provider, not affiliated with Famco, so our recommendation is based on what fits and what lasts, not what a brand rep tells us to push.

Signs Your Famco Flue Liner Replacement Is Failing

• Rust streaks or water stains on the firebox floor or basement wall. Water is getting past the liner or the liner itself is rusting through. A stainless liner that’s shedding rust is done. The alloy has failed, not the surface finish.
• Flakes of metal or scale falling into the firebox. That’s the inner wall of the liner delaminating. Once the liner starts shedding, the flue-gas path is compromised and creosote is building in places you can’t see.
• Draft that went from fine to weak in one season. A collapsed or kinked flex liner restricts the flue. The fireplace still burns, but it smokes at the edges and the fire struggles to get hot. That’s not a damper problem; that’s an airflow problem.
• An oil or gas smell that wasn’t there before. The liner’s job is to contain combustion gases. If you smell them in the house, the liner is no longer doing that job. This one is carbon monoxide territory and it warrants a call the day you notice it.
• Visible soot on the chimney exterior or attic framing near the flue. Gases are escaping before they reach the top. In older Gaithersburg brick-stack homes near the Rio Washingtonian Center, we see this pattern alongside mortar joint wear, and the liner is always the first thing we camera.

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Replacement Cost & What’s Included

A Famco flue liner replacement in Gaithersburg runs $1,800 to $3,400 installed. The spread is real, and here’s what drives it:

• Liner diameter and length. A one-story 6-inch liner is a very different job from a three-story 7-inch. Most two-story Gaithersburg homes run 25 to 35 feet of liner.
• Removal difficulty. If the old liner comes out in one pull, the labor is straightforward. If it’s rust-welded or collapsed, we’re paying for patience and the right tools.
• Access. Roof pitch, chimney height, and whether we need a lift or can work from a ladder all change the labor number.
• Connector and cap work. Most replacements need a new top plate and connector at minimum. We quote these line items separately so you see exactly what you’re paying for.

Every quote is written before work starts. You get the part number, the liner spec, the labor, and the warranty in writing. If the old liner comes out easier than expected, the price doesn’t go up. If it comes out worse, we call before spending another dollar. That’s a Haven Standard requirement, and we’ve worked under it since 2009.

DIY or Call Us?

You can check the firebox for rust, shine a flashlight up the flue, and read your appliance manual for the liner spec. That’s useful information and it makes the phone call faster. What you should not do is pull a liner yourself. A chimney flue is a confined space, and a liner installation from a ladder on a two-story roof in Gaithersburg’s wind is not a weekend project. We’ve seen DIY liner jobs where the liner was wired to the flue tile with no insulation, where the top plate leaked on day one, and where the liner was kinked into a forty-percent airflow restriction. The camera shows all of it, and the repair costs more than the original job would have.

Corrine Halstead has been pulling liners out of Montgomery County chimneys long enough to know which ones will come out clean and which ones will fight. The camera doesn’t guess. Neither do we. When you call (240) 220-9395, we schedule a Level 2 camera inspection first, show you the photos, and then hand you a written price.

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