Gelco Chimney Liner & Rebuild in Los Angeles: What to Know First
As an independent Gelco service provider, Hearthstone Chimney Co. of Los Angeles installs, repairs, and rebuilds Gelco chimney liners across the Basin, with most jobs completed in a single visit and upfront pricing that matches the final invoice. A typical Gelco stainless steel liner replacement runs $2,800-$4,500 in Los Angeles depending on flue height and access, and we carry common Gelco diameters and flex configurations on our trucks. We do not mark up parts to pad the bill, and we do not recommend a rebuild when a repair will hold.
This page is for homeowners who know they have a Gelco liner or suspect they do - maybe from a home inspection report, maybe because the last sweep mentioned it - and need someone in Los Angeles who understands the difference between a Gelco UL-1777 listed alloy and a generic substitute. If that sounds like your situation, call (844) 418-0954. A live person answers, even at 10 p.m. on a Sunday.
How Gelco Products Fail - and How We Fix Them
- Gelco Stainless Pro Series: weld-seam corrosion at the flex-to-rigid transition. In Los Angeles, the combination of marine moisture from the coast and thermal cycling from infrequent fireplace use creates pinhole leaks at the factory weld seam where the flexible upper section meets the rigid lower tee. We cut back to sound metal, fabricate a custom transition collar from matching 316Ti alloy, and pressure-test before we leave. The chimney doesn’t lie. Neither do I.
- Gelco ProFlex flexible liners: accordion compression in tight clay flues. Older Los Angeles homes, especially the 1920s Spanish Revivals in Highland Park and Eagle Rock, have narrow, offset clay flue tiles that compress ProFlex corrugations during pull-through. This creates dead spots where creosote pools. We use a mandrel expander to restore full diameter, or we switch to a Gelco rigid sectional liner where the flue geometry allows.
- Gelco oval-to-round adapters: fatigue cracking in earthquake-country installations. The Basin’s minor seismic shifting works hard on oval adapters, particularly in two-story homes with tall, unbraced chimney stacks. We find stress fractures at the weld bead that Gelco’s warranty covers but only if the failure is reported with documentation. Our Level-2 camera inspection provides that documentation, and we file the paperwork with you, not for you.
- Gelco HeatFab Saf-T Liner: premature refractory failure in zero-clearance factory-built chimneys. Common in the San Fernando Valley ranch homes built 1965-1985. The Saf-T’s wrap-and-clip insulation system degrades when homeowners run gas logs at low turndown for hours, keeping the flue below condensation temperature. We strip the saturated insulation, verify the outer wall integrity, and reinstall with HeatShield Cerfractory Foam as a bonded backup - a hybrid repair that Gelco’s literature doesn’t mention but that we’ve validated through 14 years of tracking.
- Gelco top-mount dampers: cable seizure from Santa Ana wind grit. The cast-aluminum damper bodies hold up fine, but the stainless aircraft cable runs through a narrow housing that packs with fine dust during dry Santa Ana events. We replace the OEM cable with a sealed-sleeve assembly from our Famco inventory, or we convert to a lock-top damper if the flue profile allows. Either way, you get a handle that moves when you pull it.
Our Gelco Chimney Liner & Rebuild Process
- 1
Call and schedule. A live person answers, asks what you’re seeing, and books a Level-2 inspection. We confirm your Gelco model if you know it, or we find out when we arrive.
- 2
Camera inspection and documentation. Our technician runs a 360-degree camera the full flue length, captures photos of every defect, and explains the verdict in plain English. You see what we see. No jargon, no scare tactics.
- 3
Parts decision: OEM Gelco or verified equivalent. If Gelco stock is available with reasonable lead time, we quote it. If your chimney geometry or budget points to an alternative, we explain the trade-off - DuraFlex for a tighter flex radius, HeatShield for a resurfacing candidate - and let you decide. No hidden substitutions.
- 4
The repair or rebuild. Background-checked, uniformed technicians complete most Gelco liner replacements and partial rebuilds in one day. Full chimney rebuilds may run two days. We protect your floors, haul away old material, and sweep the work area before we leave.
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Pressure test and final documentation. Every Gelco liner installation gets a smoke test or air-pressure verification per UL-1777 protocol. We photograph the completed work, log the test results, and email you the packet for your records.
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The 90-Day Done Right Promise. If anything isn’t right, we come back. In writing, no arguing. That’s the Keystone Standard, and it’s been our way since 1984.
What Gelco Chimney Liner & Rebuild Costs in Los Angeles
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Gelco flex liner replacement (single flue, standard access) | $2,800 - $3,800 | Flue height, diameter, number of offsets |
| Gelco rigid sectional liner (tall or straight flue) | $3,200 - $4,500 | Number of sections, custom tee or thimble work |
| Partial chimney rebuild with Gelco liner | $4,500 - $7,200 | Courses above roofline, scaffolding, crown replacement |
| Full chimney rebuild with Gelco liner | $8,500 - $14,000 | Foundation to cap, seismic strap requirements, stucco match |
| Gelco liner repair (spot weld, transition, damper) | $450 - $1,200 | Accessibility, parts availability, extent of metal fatigue |
These are Los Angeles market ranges based on our 2024-2025 jobs from Silver Lake to the Westside. Your exact price depends on what we find, which is why we do not quote over the phone for unseen chimneys. Call (844) 418-0954 for a free estimate - the number on the estimate is the number on the invoice.
Why Los Angeles Homeowners Call Hearthstone Chimney Co. of Los Angeles for Gelco Work
We’ve been working chimneys in Los Angeles since 1984. Gil Mercer learned this trade at Los Angeles Trade-Technical College, then spent twenty years crawling flues from Boyle Heights to the Foothills. That matters when your Gelco liner is failing in a 1940s bungalow with a tilted chimney stack and three different building codes layered on top of each other.
We carry Gelco, DuraFlex, and HeatShield materials on our trucks because no single brand fits every Los Angeles chimney. Our Level-2 inspections end with photos you can see and a plain-English verdict. Our 90-Day Done Right Promise is backed in writing with no arguing. And when you call (844) 418-0954, a live person answers - not tomorrow morning, not after you press 3, but now.
FAQs
No, if the repair is performed by a qualified technician using Gelco-compatible materials and documented properly. We are an independent Gelco service provider, not a factory authorized dealer, and we follow Gelco’s installation guidelines precisely so your warranty remains intact. We photograph our work and provide you the documentation to file any future claim. Call (844) 418-0954 if you’d like us to review your warranty status before we start.
Most Gelco stainless steel liner replacements are completed in one day, including removal of the old liner, installation, and pressure testing. Tall two-story homes or jobs requiring roof scaffolding may extend to a second day. We tell you the timeline upfront when we deliver the estimate, not when we’re halfway through. Call (844) 418-0954 to schedule - most appointments are available within 48 hours.
Yes. Gelco has consolidated some liner diameters and adapter configurations over the past decade, but we maintain cross-reference compatibility with Olympia Chimney and Copperfield components that meet the same UL listings. In rare cases we fabricate a transition in our sheet metal shop. We never leave a chimney open because a part number changed. Call (844) 418-0954 and we’ll verify availability against your existing setup.
Repair is cheaper when the damage is localized - a cracked tee, a failed top plate, a section of flex with minor corrosion. Replacement is the better value when corrosion is widespread, the liner is more than 20 years old, or the original installation used undersized diameter for your appliance. Our Level-2 inspection gives you the real condition so you can decide with numbers, not guesswork. Estimates are free - call (844) 418-0954.
We offer a permanent 5% discount for seniors and veterans, $50 off any repair over $250, and a free second opinion on any written estimate from another contractor. The $89 Seasonal Tune-Up includes a basic inspection and sweep but does not cover liner replacement; however, if we find Gelco liner damage during the tune-up, we apply the $89 toward your repair estimate. Call (844) 418-0954 to ask which offers apply to your job.
Written by Gil Mercer, Owner & Master Sweep, Hearthstone Chimney Co. of Los Angeles at Hearthstone Chimney Co. of Los Angeles, serving Los Angeles and nearby areas.