HeatShield Flue Liner Replacement Nationwide

HeatShield Flue Liner Replacement: The Marietta Owner’s Guide

HeatShield flue liner replacement in Marietta typically runs $2,800-$4,200 installed, depending on flue height, diameter, and whether the surrounding masonry needs repair. We stock HeatShield-compatible cerfractory flue liner materials through our Haven buying network and can usually schedule installation within a few business days. Most Marietta homeowners discover the problem during a routine sweep when the camera reveals spalling, cracking, or gaps in the cerfractory coating that the original HeatShield application was meant to seal.

Call (470) 288-2763

Corrine Halstead, our owner, started finding these failures regularly about ten years ago on HeatShield jobs done during the 2005-2015 boom - the cerfractory layer holds up well, but the underlying terra cotta flue tile underneath can still crack from thermal shock or settlement. Camera first, quote second, work third - in that order, every time.

Which HeatShield Models This Applies To

HeatShield is a cerfractory flue liner resurfacing system, not a standalone stainless steel liner, so “replacement” means one of two things: reapplying the HeatShield cerfractory coating over intact flue tile, or pulling a failed HeatShield job and installing a new stainless steel liner when the underlying tile is too far gone. The original HeatShield application leaves a metal tag near the damper with the date and installer - check there first. If the tag is missing, measure the flue diameter at the smoke chamber: HeatShield systems are rated for flues from 6″ to 12″ round, or 8½” × 8½” to 13″ × 13″ rectangular.

Here’s the compatibility gotcha we see in Marietta’s older homes, especially along Whitlock Avenue and in the historic districts: HeatShield was often sold as a “repair” for flues with minor cracking, but if the original installer skipped the required primer coat or applied over glazed creosote, the bond fails and the cerfractory spalls off in sheets. In those cases, re-coating is throwing good money after bad. We source replacement liners from HeatShield, DuraFlex, and Gelco through our Haven buying network, and we’ll tell you straight which route makes sense after the camera comes back up. Emberly Chimney Cleaners Marietta is an independent service provider, not affiliated with HeatShield.

Signs Your HeatShield Flue Liner Replacement Is Failing

• Flaking or spalling inside the flue. Pieces of the cerfractory coating break off and collect on the smoke shelf. This happens when the original application bonded poorly to glazed or damp tile, or when rapid temperature swings from gas-log cycling cause delamination.
• Visible gaps or cracks in the coating after brushing. A proper HeatShield job should present a smooth, continuous surface. If the brush exposes terra cotta at the joints or corners, the seal is compromised and creosote can penetrate to the masonry.
• Smoke or odor infiltration into upstairs rooms. Gaps in the liner allow combustion gases to leak through the chimney walls. In Marietta’s tight, energy-efficient homes built 2015-2025, negative pressure can pull those gases into living spaces even with a “working” flue.
• Excessive creosote buildup despite regular sweeping. A failing HeatShield coating loses its smooth, non-porous surface. Rough patches and cracks trap creosote, accelerating accumulation to Class III glazed levels within a single burning season.
• Water staining on the chimney breast or adjacent drywall. Cracks in the liner let exhaust gases condense inside the flue, and that acidic moisture weeps through to interior finishes. We see this most in Marietta’s spring shoulder season, when flues stay cool and condensation runs high.

Before

After

Replacement Cost & What’s Included

What drives the range: flue height (Marietta’s hillside lots mean some chimneys run 25+ feet), diameter, number of appliance connections, and whether the existing HeatShield needs mechanical removal or has already fallen away. Every quote is written, itemized, and delivered before work starts - Haven Standard Clause 1. The installed liner carries a lifetime warranty on materials; our workmanship is backed by the 365-Day Done Right Promise. Materials come through our Haven buying network from HeatShield, DuraFlex, Gelco, Olympia Chimney, Famco, and Copperfield - procured specifically to keep Marietta prices honest.

DIY or Call Us?

You can safely check three things: the HeatShield tag date near the damper, the flue diameter with a tape measure, and whether pieces of coating are collecting on the smoke shelf. Do not attempt to reapply HeatShield cerfractory material yourself. The product requires specific surface prep, controlled ambient temperature during cure, and a properly sized former to ensure uniform thickness - typically ¼” minimum. More critically, working inside a flue means breathing silica dust and acidic creosote particulate, and the confined space presents real fall and entrapment hazards.

If the underlying flue tile is cracked or the HeatShield has failed, you’re looking at a full liner replacement. That means dropping a stainless steel tube the full height of the chimney, properly insulating it per NFPA 211, and reconnecting appliances with correct clearances. We’ve done this on hundreds of Marietta chimneys, including plenty where a homeowner started the job and called us when the liner hung up three feet down. Call (470) 288-2763 and we’ll run the camera, write the price, and show you exactly what we found before you decide.

FAQs