DuraFlex Flue Liner Replacement Nationwide

DuraFlex Flue Liner Replacement: The Fort Lauderdale Owner’s Guide

We stock and install DuraFlex-compatible flue liner replacement in Fort Lauderdale, with most full relines running $2,200 to $4,800 installed depending on length, diameter, and roof access. If your liner is already in place and only a section or connector has failed, repairs typically fall between $450 and $1,200. Most Fort Lauderdale homeowners discover the problem the hard way: a musty smell after heavy rain, rust flakes at the cleanout door, or a Level 2 inspection that shows cracks, separation, or corrosion along the liner wall. The liner is the steel tube inside your chimney that carries combustion gases out, and when it fails, it fails quietly until it doesn’t.

Call (754) 354-1451

Key Takeaways:

• DuraFlex liners are 316L stainless steel, and in Fort Lauderdale’s salt air, the connection points fail before the liner body does.
• An ovalized (squashed) liner cannot be repaired. It must be replaced in sections or as a full run.
• We write the price before we touch a tool. The number on the invoice matches the number we quoted.
• Every DuraFlex replacement we install carries our written guarantee, and if it fails inside the guarantee period, we come back at no charge.

Which DuraFlex Models This Applies To

DuraFlex is M&G DuraVent’s smooth-wall flexible liner line, and it comes in two grades: DuraFlex 316 (316L stainless) and DuraFlex 316Ti (titanium-stabilized 316L). Both show up in Fort Lauderdale homes, but the 316Ti is the one we recommend for anything burning wood, because it holds up better against the acidic creosote that forms in our humid climate. The liners come in 4″, 5″, 5.5″, 6″, 7″, and 8″ diameters, and the right size depends on your appliance: a standard open fireplace typically needs 6″ or 7″, while a wood stove insert usually specs a 6″ liner and a gas log set may only need 4″ or 5″.

The compatibility gotcha we see constantly in Fort Lauderdale: the diameter stamped on your old liner is the inside diameter, but the knockout collar on your appliance or the clay tile opening in your flue is the outside diameter. A homeowner measures the old pipe, orders a “6-inch liner,” and it won’t fit through the existing clay tile. We measure both before we order. If you have the original DuraFlex label or warranty card, that solves it fast, but if you don’t, we measure the appliance outlet and the smoke chamber opening on site and match the liner to the actual passage, not the old part’s stamp.

Ashby Chimney Fort Lauderdale is an independent service provider and not affiliated with DuraFlex. We install genuine DuraFlex when the job calls for it and also carry HeatShield and Gelco materials when a different system fits the home better. The parts we use come from recognized chimney-trade suppliers, not whatever happened to be in the van.

Signs Your DuraFlex Flue Liner Replacement Is Failing

• Rust flakes or discoloration at the cleanout door. This means condensation is forming inside the liner and the steel is corroding from the inside out. In Fort Lauderdale, salt air accelerates this, and a liner that would last 20 years in Ohio might start showing rust at 12 here.
• A sour, smoky smell in the room even when the fire is out. When the liner cracks or separates at a seam, combustion gases and creosote odor push back into the house through the gap. This is not a smell to live with.
• Water in the firebox after heavy rain. A failed liner joint lets rain track down the flue instead of out the top. If you’re in Victoria Park or Rio Vista and you see standing water after a squall, the liner connection at the top plate is the first place we check.
• Visible separation at the liner seams during a flashlight check. DuraFlex is a continuous coil with welded seams, but the connectors and couplers between sections can pull apart if the liner was ovalized during installation or if the house settled. A disconnected joint is a direct exhaust leak.
• The liner looks squashed or out of round at the top. We call this ovalization. It happens when a liner gets forced through a tight clay tile or around a bend. Once the steel is ovalized, it never springs back, and the creased seam becomes a failure point that will split.

Replacement Cost & What’s Included

Here are the numbers we quote in Fort Lauderdale, in plain dollars. A partial section swap, where only a damaged connector or a short run needs replacement, runs $450 to $1,200 installed. A full DuraFlex 316Ti reline for a standard one-story fireplace runs $2,200 to $3,800 depending on diameter and total length. A two-story home with 35 feet of flue and a tricky roof pitch runs $3,800 to $4,800. Those prices include the liner material, top plate, rain cap, connector, labor, and haul-away of the old parts.

What drives the range in Fort Lauderdale specifically: two-story homes need scaffolding or a steeper roof setup, barrel tile roofs common in older neighborhoods like Sailboat Bend and Tarpon River take longer to flash correctly, and a liner that has to squeeze through an offset clay tile run takes more time than a straight drop. You’ll get a written price on paper before we start, and the invoice matches it. Every replacement carries our written guarantee. If the repair fails inside the guarantee period, we return and fix it at no charge. That’s the 365-Day Done Right Promise, and it’s included with every job, not sold as an add-on.

How We Install It: What to Expect

The job usually takes a full day from setup to cleanup. We start by laying protection inside the home around the fireplace and at the roofline. Then we remove the old liner sections or the damaged connector, measure the true inside diameter of the clay tile passage, and pull the new DuraFlex through with a winch line. We don’t force liners through tight tile, because that’s exactly how ovalization happens, and an ovalized liner is a throwaway. Once the liner is seated and the top plate is sealed, we run a camera down the full length so you can see the finished wall with your own eyes before we call the job done. Say the price first, explain the work second, put it all in writing, that is the whole business model.

How Fort Lauderdale weather changes the picture: we’re installing steel in a salt-air, high-humidity environment. That means we seal the top plate with a marine-grade silicone and we specify 316Ti over standard 316L whenever the chimney runs through an unlined chase or the home is within two miles of the ocean. Homes along Las Olas Boulevard and the barrier island get a titanium-stabilized liner, period. A standard 316 liner installed near salt water will show pitting in five to seven years. That’s a real lifespan number, not a sales line.

DIY or Call Us?

You can safely do the inspection work. Put a flashlight in the firebox, look up, open the cleanout door and check for rust flakes, and check the top of the chimney for a liner that looks pulled away from the cap. Those checks are free and useful. What you should not do is pull a liner yourself. A flexible liner is under tension when it’s being drawn through the flue, and a 30-foot stainless coil that snaps back can do real damage to hands, face, or the chimney crown. The connectors and couplers also need to be torqued correctly and sealed at the joints, and a bad seal at a joint is a carbon monoxide path into the house. This is a job for trained people with the right rigging and a camera to verify the wall. If you’ve already got a failed DuraFlex section, call us at (754) 354-1451 and we’ll give you a written price before any work begins.

FAQs

Call for a Written Price

If you have a DuraFlex liner that’s showing rust, odor, water, or separation, call us at (754) 354-1451. You’ll talk to a live person, not a voicemail loop. We’ll go over what you’re seeing, give you an honest sense of what it likely costs, and send a background-checked, uniformed technician at a real arrival window. Every quote is in writing before any work starts, and every repair carries the 365-Day Done Right Promise. If it’s not done right, we make it right.

Written by Nathan Corliss, Owner, Ashby Chimney Fort Lauderdale at Ashby Chimney Fort Lauderdale, serving Fort Lauderdale and nearby areas.