Gelco Chimney Liner & Rebuild in Chicago: What to Know First
We provide independent Gelco chimney liner and rebuild service throughout Chicago, with most liner replacements and partial rebuilds completed in a single visit and priced upfront before any work begins. A typical Gelco stainless steel liner installation in a Chicago two-flue chimney runs $2,800-$4,200, while a partial rebuild with new Gelco liner runs $4,500-$7,500 depending on height and access. Call (888) 289-6055 for a free estimate with no obligation.
This page is for homeowners who already have a Gelco liner, cap, or component in their chimney system and need it repaired, replaced, or rebuilt right. You may have bought the house with Gelco already installed, or a previous contractor specified it. Either way, you want someone who knows the product line, stocks the fittings, and will not substitute a generic part that voids your remaining warranty coverage. We are an independent Gelco service provider, not affiliated with or authorized by the manufacturer. We have worked on Gelco systems in Chicago since the early 1990s, from brick bungalows in Portage Park to frame-and-stucco homes in Lincolnwood.
How Gelco Products Fail - and How We Fix Them
- Gelco Stainless Pro-Series liners develop seam separation at the flex-to-rigid transition point, especially in Chicago’s freeze-thaw cycles where condensation collects in the lower joint. We cut back to sound metal, install a Gelco-specific tapered coupling, and seal with high-temp silicone rated to 1,800°F - not the generic clamp-and-tape method that fails again in two winters.
- Gelco UltraFlex flexible liners collapse inward when overspec’d for a straight run or when creosote buildup adds weight the corrugated wall cannot support. We inspect with a level-2 camera to confirm wall integrity, then either re-spec with the correct diameter or switch to a rigid Gelco stainless run if the flue is straight enough.
- Gelco Top-Mount dampers integrated with liner tops seize in the open position after years of Chicago’s acidic flue gas condensation attacks the cast-aluminum frame. We replace the damper assembly with a current Gelco OEM unit or, if the liner collar is damaged, fabricate a stainless adapter in our shop rather than forcing a mismatched part.
- Gelco liner connections to factory-built fireplace inserts loosen at the appliance adapter collar, particularly in homes near the lake where thermal expansion cycles are sharper. We reseat with a Gelco-specific compression band and add a locking tab washer - a detail many crews skip, which is why we find adapters dangling by soot alone.
- Gelco chimney caps with integrated spark arrestors corrode through at the mesh weld points where road salt aerosol from Chicago’s winter plowing settles on the crown and wicks upward. We replace with a current Gelco cap or, if the flue is now oversized due to previous repairs, fit a Copperfield custom cap with a Gelco-compatible base ring.
Our Gelco Chimney Liner & Rebuild Process
- 1
Call and schedule. A live person answers, 24 hours a day. We ask about your chimney’s age, the last inspection date, and any symptoms - smoke backup, water stains, cold drafts. We book a level-2 camera inspection, usually within 48 hours.
- 2
Inspect and document. Our technician runs a camera the full length of the flue, photographs every joint, seam, and transition. You see the images on a tablet. We deliver a plain-English verdict: repair, reline, or rebuild. The estimate is itemized and fixed.
- 3
Parts decision. If your Gelco component is under warranty, we source OEM. If warranty has lapsed, we may recommend a quality aftermarket equivalent from our DuraFlex or HeatShield inventory - always with your approval, never as a surprise substitution.
- 4
Repair or rebuild. For liner replacement, we pull the old run and install the new Gelco or approved equivalent in one day. For partial rebuilds, we rebuild from the roofline up with matching brick and install the new liner before the crown is poured. For full rebuilds, we stage scaffolding, rebuild course by course, and liner after.
- 5
Test and verify. We pressure-test liner joints, run a final camera pass, and verify draft with a manometer. You get printed photos, a written report, and our 90-Day Done Right Promise - in writing, no arguing.
- 6
Cleanup and follow-up. We haul away debris, sweep the hearth area, and leave the work site as we found it. A senior technician reviews the job within 30 days by phone to confirm satisfaction.
What Gelco Chimney Liner & Rebuild Costs in Chicago
These are real numbers for Chicago’s market, based on jobs we have completed in the last 18 months in neighborhoods from Rogers Park to Beverly. Your exact estimate depends on flue count, roof height, and whether we can access the chimney interior without scaffold.
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Gelco stainless liner, single flue, standard install | $2,800 - $4,200 | Height above 25 ft, offset flue, need for demolition of old liner |
| Gelco flexible liner with insulation wrap | $3,400 - $5,100 | Diameter (6″ vs 8″), number of bends, liner length |
| Partial chimney rebuild with new Gelco liner | $4,500 - $7,500 | Courses rebuilt, crown replacement, scaffold required |
| Full chimney rebuild with Gelco liner system | $8,500 - $14,000 | Height, brick matching, permit requirements, access |
| Gelco liner repair (seam, collar, cap) | $450 - $1,200 | Part availability, need for custom fabrication |
We do not quote by phone for rebuilds - we need to see the chimney. Estimates are free, and the number on the estimate is the number on the invoice. Call (888) 289-6055 to schedule.
Why Chicago Homeowners Call Hearthstone Chimney Co. of Chicago for Gelco Work
We have been in Chicago since 2014. We plan to be here in 2054. That changes how we treat every job.
Our 90-Day Done Right Promise is not a slogan - it is a written agreement. If something is not right, we make it right. No paperwork to dig up, no arguing about whether the problem is “in scope.” Krafted right, every time, your home first, standing behind it.
Our technicians are background-checked, uniformed, and trained on Gelco’s specific fitting system - not general “metal liner” knowledge that leads to forced connections and callbacks. We stock Gelco, DuraFlex, and HeatShield components so we are not waiting on a warehouse while your chimney sits open.
A live person answers the phone at (888) 289-6055, every hour of every day. Not a callback queue. Not an app. A person who can schedule your free estimate or connect you to a technician if you have an active leak or backdraft.
FAQs
No, if the repair is done with Gelco OEM parts and follows the manufacturer’s installation guidelines. As an independent Gelco service provider, we source OEM components when your warranty is still active and document the work so you have a record. If warranty has expired, we will tell you plainly and offer quality alternatives from DuraFlex or HeatShield. Call (888) 289-6055 to discuss your specific liner series and purchase date.
We stock common Gelco stainless liners, flex couplings, and top-mount dampers in our Chicago warehouse, so most standard jobs need no waiting. Specialty diameters or custom lengths typically arrive in 3-5 business days from Gelco’s Midwest distributor. We will not start a job until the correct part is in hand - no temporary fixes that become permanent problems. For urgent situations, ask about our DuraFlex or HeatShield cross-compatible options when you call.
Repair is cheaper when the damage is localized - a failed seam, a corroded cap, a loose collar. Replacement is the better value when we find multiple seam separations, wall thinning visible on camera, or previous repairs that have compromised the liner’s structural integrity. We show you the camera footage and give you both numbers, repair and replace, so you can decide. Estimates are free - call (888) 289-6055.
Yes. Gelco uses standard diameters and collar configurations that interface with most factory-built fireplaces and masonry flues. Where an exact match is no longer manufactured, we fabricate adapters in our shop or specify a HeatShield or DuraFlex equivalent that meets the same UL 1777 standard. We never force a fit that risks draft failure or creosote buildup.
We schedule level-2 inspections within 48 hours for non-emergencies, and same-day for active water intrusion, backdrafting, or suspected liner collapse. Most liner replacements and partial rebuilds are completed in a single visit once parts are confirmed. Call (888) 289-6055 - a live person will answer and find the next available slot.
Written by the team at Hearthstone Chimney Co. of Chicago, serving Chicago and nearby areas.