Gelco Flue Liner Replacement Nationwide

Gelco Flue Liner Replacement: The Woodland Hills Owner’s Guide

If you’ve been told your Gelco flue liner needs replacing, here’s the short version: we stock Gelco-compatible stainless steel flue liners on our trucks, and a full replacement in Woodland Hills typically runs $1,800 to $4,200 installed, depending on your chimney’s height, access, and whether we’re pulling an old liner or starting fresh. Most replacements are done in a single visit, usually four to six hours. Most homeowners discover the problem the same way: a chimney sweep or inspector runs a camera up the flue, shows you a photo on a phone screen, and points to cracks, rust-through, or separation at a seam. What you’re looking at is the protective sleeve that carries smoke and combustion gases out of your home. When it fails, it stops being a sleeve and starts being a leak.

Call (559) 249-1347

We’re Hadley Chimney Woodland Hills, an independent chimney service company. We’re not affiliated with Gelco, but we work with their liners and their specs every week. Cory Mitchell, our owner and lead technician, has spent the better part of two decades looking at failed liners across the West San Fernando Valley, and the Gelco failures he sees follow a pattern: corrosion at the lower joints, cracks near the tee, and liner walls that look fine from the top but are gone at the bottom. You’ll see photos of exactly that before anyone hands you an invoice.

Which Gelco Models This Applies To

Gelco makes both rigid and flexible stainless steel chimney liners, and the replacement path depends on which one your home has. Gelco flexible liners, which are the ones we pull out of most Woodland Hills chimneys, come in diameters from 4 inches up to 12 inches, in both 316L and 304 stainless alloy. The 316L is the alloy you want in a wood-burning fireplace: it holds up far longer against the acidic condensation that creosote produces. If your liner is a rigid Gelco model, those are generally found in newer construction or as a recent retrofit, and they’re sized differently: fixed lengths, welded seams, and a much tighter fit tolerance inside the flue.

Here’s the practical compatibility gotcha on Gelco replacements: the liner’s diameter is stamped on the collar or etched near the top of a rigid section, but on a flexible liner that’s been in service for a decade, that stamp is usually gone. We measure with a caliper at the tee and at the top termination, and we always size the replacement to the larger of the two numbers, not the smaller. An undersized liner on a Gelco system is the single most common install mistake we correct, and it robs your fireplace of draft and pushes carbon monoxide back into the living space.

For most homeowners, OEM Gelco is a fine choice if we can get the exact spec, but an equivalent 316L liner from DuraFlex or Olympia often ships faster and carries the same lifespan. We’ll show you the options and the price difference before you commit. You don’t have to guess.

Signs Your Gelco Flue Liner Replacement Is Failing

• Flakes of metal in the firebox. You might see what looks like dark glitter or thin silver shavings on the firebox floor after a fire. That’s liner material corroding from the inside and dropping down. It’s the most visible early warning.
• A smell you can’t place after the fire is out. A functioning liner carries the exhaust out. A cracked one lets it seep into the chase or the wall cavity. You’ll notice a stale, acrid smell in the room hours after everything’s cold.
• Water or rust streaks inside the flue opening. If you shine a flashlight up from the firebox and see orange streaks or drip lines, water is getting in, and water plus heat is what kills a liner. In Woodland Hills, we see this most after the winter rain season.
• The damper area looks wet or shows salt-like crystals. Condensation forms when the liner can’t maintain a clean draft. The residue it leaves behind is a sign your liner is either cracked or too large for the appliance it’s venting.
• You hear a rattle or feel a wobble when the liner is knocked from above. A loose or separated liner section can shift in the flue. We check for this with a gentle tap test during an inspection, and if it moves, the connection has failed even if the metal looks fine.

None of these are things to sit on. A failed liner doesn’t just vent smoke into your house; it can also allow a chimney fire to reach combustible framing that was never designed to see direct flame.

Replacement Cost & What’s Included

In Woodland Hills, a Gelco flue liner replacement with Hadley Chimney Woodland Hills lands between $1,800 and $4,200 installed. The spread comes from a few things: chimney height (a two-story Warner Center home costs more than a single-story in Walnut Acres simply because of ladder and scaffold time), whether the old liner is still in place and needs extraction, and whether the existing crown or rain cap needs any work once we’re up there.

Here’s what that number includes, and we put it in writing before work starts, every single time:

You’ll see the exact number before any work begins, and you’ll get digital photos of the old liner out and the new liner in. If the liner we install fails inside a year, we come back and fix it free. That’s not a promo; it’s the way we’ve done it since 2003.

DIY or Call Us?

You can safely do the inspection part yourself. Shine a light up from the firebox, look for rust streaks, flakes, or water damage, and take photos of anything that looks off. That’s genuinely useful, and it helps you talk to us intelligently about what you’re seeing. But pulling and replacing a flue liner is not a safe weekend project. You’re working at height on a roof, handling a stainless steel liner that’s heavy and awkward, and if the connection at the appliance collar isn’t made correctly, you’ve created a carbon monoxide path into the house. We’ve corrected plenty of DIY liner jobs in Woodland Hills where the homeowner saved $600 on installation and then paid more than that in repair work.

If your Gelco liner is showing any of the signs above, call us at (559) 249-1347. We’ll get eyes on it, show you what we see, and give you a written price before you decide anything.

FAQs