Gelco Chimney Liner & Rebuild Nationwide

Gelco Chimney Liner & Rebuild in Boston: What to Know First

We provide independent Gelco chimney liner and rebuild service across Boston, with most jobs completed in a single visit and pricing agreed upfront before any work begins. A typical Gelco stainless steel liner replacement runs $2,800-$4,500 depending on flue height and access, while partial rebuilds start around $3,200. We are not affiliated with or authorized by Gelco - we are an independent service provider who has worked on enough of their products to know where they hold up and where they don’t.

Call (857) 597-5950

This page is for Boston homeowners who already have a Gelco liner or are considering one, and need straight talk about what fails, what it costs to fix, and who can actually do the work right. If you’re in Dorchester, Roslindale, Jamaica Plain, or anywhere in between, call (857) 597-5950 and a live person will pick up, 24 hours a day.

How Gelco Products Fail - and How We Fix Them

• Gelco Ultrapro stainless liners crack at the flex-to-rigid transition. The Ultrapro’s corrugated flex section meets a smooth rigid pipe at a welded collar that sees the most thermal stress in the entire system. In Boston’s freeze-thaw cycle, that collar works loose over five to seven years. We cut back to sound metal, install a proper Gelco-compatible transition piece or a DuraFlex equivalent if the OEM part is back-ordered, and back-seal with high-temp silicone rated to 1,200°F.
• Gelco ProFlex flexible liners sag in tall, offset flues common in triple-deckers. The ProFlex is lighter gauge than it looks on the spec sheet, and in a three-story Dorchester triple-decker with a 45-degree offset, the liner can belly out at the bend. We pull a camera first to map the sag, then either install a rigid support plate at the offset or upsize to a heavier DuraFlex liner if the flue geometry allows. The ProFlex itself isn’t defective - it’s just the wrong choice for certain Boston housing stock.
• Gelco top-mount dampers seize after salt-air exposure. Coastal neighborhoods like South Boston and East Boston see accelerated corrosion on the galvanized damper frames Gelco shipped before 2018. The damper won’t open fully, which starves the fire for air and accelerates creosote buildup. We replace with a stainless damper assembly, or if the frame is too far gone, we rebuild the top of the flue with a new concrete crown and a separate Lyemance or Lock-Top damper.
• Gelco smooth-wall liners delaminate at the boot connection in oil-to-gas conversions. When a Boston homeowner switches from oil to gas, the lower flue temperature changes the condensation pattern. Gelco’s older smooth-wall boots weren’t designed for the acidic condensate that gas produces. We pull the boot, inspect the surrounding masonry for spalling, and install a gas-rated Condar or HeatShield boot with proper drainage weep holes - something Gelco’s own installation manual only added in the 2019 revision.
• Gelco chimney caps clog with creosote in dense-pack neighborhoods. The standard Gelco cap has a 3/4-inch mesh that works fine in open country but packs solid in Boston’s tight chimney rows where downdrafts are common. We see this in Back Bay brownstones where four flues share a narrow parapet. We upgrade to a Famco or Copperfield cap with 5/8-inch mesh and a wider lid overhang, or fabricate a custom copper cap if the building is landmarked.

Our Gelco Chimney Liner & Rebuild Process

1. 1
   Call and schedule. A live person answers, asks what you’re burning, how old the system is, and whether you’ve noticed smoke, odor, or draft problems. We book a Level-2 camera inspection, not a sales visit.
2. 2
   Camera inspection and photos. Our technician runs a chimney camera from top to bottom, records the full flue, and stops to photograph every defect. You see the images on a tablet before we leave the roof. We deliver a plain-English verdict: what’s wrong, what caused it, and what happens if you do nothing.
3. 3
   Parts decision: OEM Gelco or quality equivalent. If the job is warranty-related and Gelco parts are in stock, we use them. If the warranty has expired or Gelco is back-ordered (their Massachusetts distributor sometimes runs two weeks out on ProFlex transitions), we specify DuraFlex or HeatShield equivalents that meet or exceed UL 1777. We explain the trade-off and you decide.
4. 4
   The repair. Our crew arrives in a single truck with the liner, mortar, and rebuild materials already loaded. Most Gelco liner replacements and partial rebuilds finish in one day. We protect floors, contain dust, and haul away the old liner.
5. 5
   Post-repair test and documentation. We run a smoke test or draft gauge check, depending on the appliance type. You get a written report with photos, the 90-Day Done Right Promise in writing, and an invoice that matches the estimate exactly.
6. 6
   Cleanup and follow-up. We sweep the work area, walk you through what was done, and leave a card with our direct line. If anything doesn’t feel right in the next 90 days, we come back. No paperwork, no arguing.

What Gelco Chimney Liner & Rebuild Costs in Boston

These are real Boston numbers, not national averages. A triple-decker in Mattapan with a straight 25-foot flue sits at the low end. A four-story Back Bay brownstone with a offset flue and a landmark review requirement sits at the high end. We give you the exact number before we start. Call (857) 597-5950 for a free estimate - we bring the camera, not a sales pitch.

Why Boston Homeowners Call Hearthstone Chimney Co. for Gelco Work

We’ve been in Boston chimneys since 1984. Russell Haines learned the trade at Los Angeles Trade-Technical College, where the instructors had no patience for shortcuts, and he’s carried that standard through more than two decades of hands-on work here - from triple-deckers in Dorchester to old brownstones near the Back Bay. Our crew knows the difference between a ProFlex that can be saved and one that needs replacing, and we won’t sell you a full rebuild when a boot replacement will do.

Every job comes with the 90-Day Done Right Promise in writing: Krafted right, Every time, Your home first, Standing behind it. If it’s not right, we make it right. No arguing. We also carry DuraFlex, HeatShield, Olympia Chimney, Famco, and Copperfield materials, so if Gelco parts are delayed or discontinued, your job doesn’t stall. Photos you can see, a plain-English verdict, and a square deal with no surprises on the bill.

If the chimney’s doing its job, you won’t notice it. You hire us so it stays that way.

FAQs