HeatShield Flue Liner Replacement in Los Angeles, CA

HeatShield Flue Liner Replacement: The Los Angeles Owner’s Guide

HeatShield flue liner replacement in Los Angeles typically runs $2,800-$4,200 installed for a standard masonry chimney, and we stock the full range of HeatShield-compatible liners and Cerfractory Foam resurfacing kits on our trucks for same-day starts. Most jobs we handle in the Basin are completed in a single visit once we’ve run our camera and confirmed the exact spec. Homeowners usually discover the problem on the first cold night in November, when smoke backs into the living room or a neighbor spots cracked tile spilling from the top of the stack.

Call (844) 418-0954

Which HeatShield Models This Applies To

HeatShield builds two distinct systems for chimney restoration, and knowing which one you have determines whether you’re looking at a liner swap or a resurfacing job. The HeatShield UL Listing 1777 stainless steel liners come in 316Ti alloy for wood-burning and AL29-4C for gas appliances, with diameters from 3 to 12 inches and flexible or rigid configurations. The Cerfractory Foam system is not a liner at all but a resurfacing compound applied to existing clay flue tiles, rated to 3,000 degrees and warrantied for 20 years when installed to factory spec.

To identify your system, check the metal tag at the top of the chimney or the documentation from your last sweep. If you see “UL 1777” and a diameter marking, you’ve got the steel liner. If there’s no liner visible but the flue surface looks smooth and cream-colored, that’s Cerfractory. We carry both: full 316Ti and AL29-4C liner kits from HeatShield, plus the complete Cerfractory Foam mixing and pump rig. For aftermarket equivalents on the steel side, we also stock DuraFlex and Gelco liners that meet the same UL 1777 standard, often at a lower parts cost with identical performance. The catch in Los Angeles is earthquake bracing: any liner installed here must meet California Building Code Chapter 21 seismic restraint requirements, which means the support plate and top termination can’t be generic. We see a lot of out-of-state kits that skip the L.A. County-required bracing hardware. That’s a failed inspection waiting to happen.

Hearthstone Chimney Co. of Los Angeles is an independent service provider, not affiliated with HeatShield. We source factory-direct and through our distributor in Vernon, but we answer to our customers, not to any brand’s territory manager.

Signs Your HeatShield Flue Liner Replacement Is Failing

• Smoke or odors seeping into rooms. A breach in the liner, whether steel or Cerfractory, lets combustion gases escape through gaps or cracks. In Los Angeles, where we pressurize houses tight for summer cooling, even a small leak becomes noticeable fast.
• White or tan staining on exterior brick. This is efflorescence from moisture and acid vapor migrating through a compromised flue. We see it most on south-facing walls in Silver Lake and Los Feliz, where thermal cycling is hardest on the masonry.
• Chunks of clay tile in the firebox or cleanout. If you have a steel liner, this means the original clay liner is shedding behind it, which can block the airway. If you have Cerfractory, it means the coating has delaminated and exposed the original tile beneath.
• Rust streaks at the chimney top or on the firebox walls. 316Ti steel resists corrosion, but AL29-4C liners serving condensing gas appliances can fail at the welds if the appliance was oversized or the flue runs cold. The salt air in beach neighborhoods from Venice to San Pedro accelerates this.
• Draft problems that worsen on windy days. A liner that’s pulled away from the top termination, or a Cerfractory surface that’s developed pinholes, creates turbulence instead of smooth draw. The Santa Ana winds expose this flaw every fall.

Replacement Cost & What’s Included

Here’s how pricing breaks down for HeatShield flue liner replacement in Los Angeles:

The wide range comes down to three factors: chimney height (a two-story Tudor in Hancock Park needs more liner than a single-story in Van Nuys), access for our rig, and whether the existing liner has collapsed and needs extraction before the new one goes in. We quote upfront, and the number on the estimate is the number on the invoice. Every liner replacement carries our 90-Day Done Right Promise in writing, no arguing. If the draft isn’t right or the seal fails, we come back. The chimney doesn’t lie. Neither do I.

DIY or Call Us?

There’s a short list of things a homeowner can safely check. Make sure the damper opens fully. Shine a flashlight up the flue and look for obvious gaps or fallen debris. Verify the cap is in place after wind. That’s about where DIY ends for this part.

Installing or replacing a flue liner involves working at height on a roof, often with steep pitches, and handling materials that must meet fire safety and seismic codes. A liner that’s even an inch short on the top termination, or missing the required support plate spacing, can create a carbon monoxide hazard or a chimney fire. We’ve pulled out three homeowner-installed liners in the last two years in Los Angeles alone, all because the sizing was wrong or the connection to the appliance was improvised. The 316Ti and AL29-4C alloys also require specific cutting tools; a standard tin snip work-hardens the edge and creates a stress riser that cracks under thermal load.

If you’re unsure what system you have or whether it needs replacement, call us at (844) 418-0954. We’ll run the camera, show you the photos, and give you a straight answer.

FAQs