HeatShield Flue Liner Replacement in Jacksonville, FL

HeatShield Flue Liner Replacement: The Jacksonville Owner’s Guide

HeatShield flue liner replacement in Jacksonville typically runs $1,800 to $3,400 installed, depending on flue height and whether the existing liner pulls out cleanly or has to be cut out in sections. We stock HeatShield-compatible alloy liners in the most common diameters for First Coast homes, and most replacements are completed in a single day. Homeowners usually discover the problem during a routine cleaning when the camera shows cracked tiles, spalling mortar joints, or a liner that has shifted out of alignment after years of thermal cycling in our humid subtropical climate.

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Which HeatShield Models This Applies To

HeatShield manufactures two distinct liner systems, and knowing which one is in your chimney determines the replacement path. The HeatShield Cerfractory Flue Seal is a resurfacing product applied over existing clay tile liners, not a standalone liner itself. If your chimney was treated with Cerfractory, the underlying clay tiles may still be the structural element that needs replacement. The HeatShield Alloy Stainless Steel Liner is a full replacement system, typically 316Ti or 304 stainless, and carries its own model designation based on diameter and insulation package.

To identify what you have, look for a metal tag at the top of the flue where the liner terminates, or check your closing paperwork from the original installation. The tag lists diameter, alloy grade, and manufacturing date. For Cerfractory systems, there is no liner tag, but you may find a warranty card or invoice referencing “flue resurfacing” rather than “liner replacement.”

We do not use builder-grade substitutes. When the original HeatShield alloy liner has reached end of life, we install a compatible replacement from our professional-grade inventory, matched to the exact diameter and insulation spec. HeatShield alloy liners in Jacksonville homes typically measure 6, 7, or 8 inches in diameter for residential wood-burning fireplaces, with 6-inch being most common in the 1950s-1970s ranch homes found throughout Arlington and San Marco.

Hearthstone Chimney Co. of Jacksonville is an independent service provider. We are not affiliated with HeatShield, though we have installed and replaced their systems for more than two decades and maintain current compatibility with their specifications.

Signs Your HeatShield Flue Liner Replacement Is Failing

• White efflorescence or powdery residue on the exterior brick. This signals moisture migrating through compromised mortar joints in a Cerfractory system, or condensation collecting behind a breached stainless liner. In Jacksonville’s high humidity, this accelerates once the liner’s integrity drops.
• Bits of clay tile in the firebox after sweeping. With Cerfractory-over-tile systems, the resurfacing material can mask underlying tile degradation until pieces begin falling. We pulled a handful of fractured tile from a Mandarin home last winter where the homeowner had no idea the liner was failing.
• Smoke drafting poorly despite an open damper and clear flue. A stainless liner that has separated at a joint, or a Cerfractory surface that has delaminated, creates turbulence that kills draft. The fire burns sluggishly, and smoke lingers in the firebox.
• Hot exterior masonry or a noticeable warmth on the chimney breast during a fire. This means flue gases are escaping the liner and heating the surrounding structure. It is a genuine safety concern, and the fire should not be used until inspection.
• Visible cracks or gaps in a stainless liner when viewed from the top. Our Level-2 camera inspection shows these clearly. Thermal expansion from decades of heating and cooling, combined with salt air corrosion in homes nearer the St. Johns River or the coast, can fatigue the alloy at joint seams.

Replacement Cost & What’s Included

Installed pricing for HeatShield-compatible flue liner replacement in Jacksonville breaks down as follows:

What drives the range: flue height (a two-story Ortega home with a tall chimney costs more than a single-story in Lakewood), whether the existing liner can be pulled intact or must be cut and extracted in pieces, and the condition of the top plate and crown. We price this upfront, after inspection, with photos you can see and a plain-English verdict. The number on the estimate is the number on the invoice.

Every liner replacement carries our 90-Day Done Right Promise in writing. If it’s not right, we make it right. No paperwork to dig up, no argument.

DIY or Call Us?

There is no safe DIY path for flue liner replacement. The work involves working at height on a pitched roof, handling sharp stainless steel sections in a confined flue, and ensuring NFPA 211-compliant clearances to combustibles. A liner that is not fully supported, improperly insulated, or terminated incorrectly creates a chimney fire risk and can void homeowner’s insurance.

What you can do: check your fireplace paperwork for the original liner specification, note any symptoms from the list above, and call us for a Level-2 camera inspection. We’ll show you exactly what the flue looks like, explain whether repair or full replacement is warranted, and give you a fixed price before any work begins. Most liner replacements are completed in a single visit once scheduled.

Call (833) 974-6113 for a free estimate. A live person answers, 24 hours a day.

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