Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Before
After
Before
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Before
AfterWhy Boston Homeowners Choose Gelco Chimney Cleaning
We provide independent Boston Gelco service for chimney cleaning, inspection, and repair across the city, using OEM-compatible parts and warranty-safe practices for Flex King liners and multi-flue caps. Our sweeps know how Gelco products age in New England’s freeze-thaw cycles, and we document every flue with camera photos you can see before any work begins. Call (857) 597-5950 for a free estimate.
Gelco’s stainless steel liners and chimney caps are common in Boston’s older housing stock, especially where clay-tile flues have been retrofitted for gas, oil, or wood-burning appliances - which is why our Chimney Cleaning & Sweep services stay busy year-round. In triple-deckers from Dorchester to Jamaica Plain, you’ll often find a single Gelco Flex King Pro serving a basement boiler while another flue in the same stack runs a first-floor fireplace. That density of shared systems means one flue’s problem can affect the whole stack. We’ve worked on these configurations for years, so we know to inspect the entire chimney, not just the unit that called us in.
We’re an independent chimney company. We are not authorized, sponsored, or warranty-endorsed by Gelco. We simply service their products every week, and we do it with the same thoroughness we apply to DuraFlex, HeatShield, or any other professional-grade brand we carry.
Why Trust Hearthstone Chimney Co. for Your Gelco Chimney Cleaning?
Russell Haines learned the trade at Los Angeles Trade-Technical College, where instructors drilled in hands-on fundamentals and had no patience for shortcuts. That stuck. Over more than two decades in chimneys, he’s become the person Boston neighbors call when a fireplace problem turns out to be more complicated than the last sweep thought. From triple-deckers in Dorchester to old brownstones near the Back Bay, he and our crew have seen what New England winters do to a flue nobody has touched in ten years - and we’ve built a strong reputation for Revere Gelco service along the way.
Our Gelco work is specific, not generic. We match the original kit’s alloy, diameter, and insulation rather than forcing in whatever fits. For Flex King Pro and Flex King HD liners, we know the corrugation pattern and how it packs with creosote in wood-burning service. For multi-flue caps, we stock compatible screens, gaskets, and mounting hardware so we’re not ordering parts and making you wait. Every technician is background-checked and uniformed, and most Gelco jobs - sweep, inspection, and cap replacement - wrap in a single visit.
We document everything. Level 2 camera inspection ends with photos you can see and a plain-English verdict. No surprises on the bill. The 90-Day Done Right Promise covers every job in writing - if it’s not right, we make it right, no arguing.
Common Gelco Chimney Cleaning Problems We Fix in Boston
- Flex King liner corrugation valleys packed with creosote glaze. The ridges that make Gelco liners flexible also trap condensed creosote in wood-burning flues. Over seasons, this hardens into a glossy layer that hides pinholes and seam separation from the naked eye. We find it with a Level 2 camera inspection, then mechanically sweep or replace the liner depending on how deep the damage runs. In Boston’s triple-deckers, where one chimney stack serves multiple units, this glaze can accelerate dramatically if a neighboring flue is venting a moisture-rich gas appliance.
- Top-plate gaskets cracked and leaking at the crown. The gasket sealing a Gelco liner’s top plate to the chimney crown dries and cracks after repeated freeze-thaw cycles. Boston’s cycle runs November through March, and the salt-laden air off the harbor speeds deterioration in waterfront neighborhoods like Charlestown and East Boston. Water gets in, freezes, expands, and the leak widens. We replace with quality aftermarket gaskets rated for the same temperature range, or source OEM when available.
- Multi-flue cap screens clogged with soot and creosote. Gelco’s stainless multi-flue caps have fine mesh screens that protect against sparks and animal entry. In wood-burning service, especially with improperly seasoned fuel, these screens choke with debris and cut draft. Smoke spills back into the room on cold starts. We clean or replace screens in the field, and we check whether the underlying flue condition is causing the excessive buildup.
- Cap legs and mounting hardware corroded or stripped. Coastal Boston wind and rain, loaded with salt, attack the hardware securing Gelco caps to flue tiles. Legs corrode. Screws strip. The cap shifts off-center and loses its seal. We’ve found caps held by a single bolt in South Boston and Charlestown, ready to lift off in the next nor’easter. We replace with marine-grade compatible hardware and re-seat the cap properly.
- Shared-stack cross-contamination between flues. This one’s Boston-specific. In triple-deckers with multiple Gelco liners in one masonry stack, a breach in one liner can pull combustion gases into another unit’s air supply. We inspect every flue in the stack, not just the one that called, because the real hazard might be two floors down.
Gelco Parts & Our Repair-vs-Replace Approach
We stock Gelco-compatible parts locally: stainless screens and mesh for multi-flue caps, top-plate gaskets, flex connector hardware, and insulation wraps for Flex King Pro and HD liners. When OEM Gelco parts are discontinued or on backorder, we use quality aftermarket equivalents matched to the original alloy and temperature rating.
Our repair-vs-replace stance is straightforward. Isolated creosote buildup or a single cracked gasket? We fix it. Pinholes, seam separation, or glaze damage spread across multiple corrugation valleys? We tell you plainly that replacement beats patching, and we show you the camera footage so you can see why. No upsell, no scare tactics. Just the photos and our recommendation.
Call (857) 597-5950 for an exact quote. Estimates are free.
Our Gelco Service Process - Step by Step
- 1
Diagnosis with Level 2 camera inspection. We run a camera the full length of your Gelco liner, looking for creosote glaze hiding in corrugation valleys, seam separation, and liner-to-appliance connection integrity. For caps, we inspect screens, gaskets, and mounting hardware. You get photos and a plain-English verdict before any work is approved.
- 2
Repair or installation with matched parts. We use Gelco-compatible components - same alloy, same diameter, same insulation value. For cap replacements, we verify flue tile dimensions and crown condition so the new cap seats correctly and stays seated through Boston’s freeze-thaw cycle.
- 3
Post-service draft and flow testing. We verify proper draft with the appliance running at operating temperature, check for spillage at startup, and confirm cap screen airflow is unrestricted. In multi-flue stacks, we verify no cross-draft between units.
- 4
Warranty documentation. Your invoice notes parts used, work performed, and any recommendations for future service. The 90-Day Done Right Promise applies automatically - in writing, no paperwork required from you.
Gelco Products We Service & Install in Boston
We work on Gelco Flex King Pro stainless liner kits for standard residential appliances, Gelco Flex King HD heavy-duty liners for higher-temperature or commercial-duty installations, Gelco multi-flue stainless chimney caps for shared-stack configurations common in Boston triple-deckers, and Gelco single-flue stainless caps and top plates. We stock screens, gaskets, and hardware for these lines locally, and we can source full liner kits when replacement is the honest call.
We Also Service These Brands
Hearthstone Chimney Co. is not a single-brand shop. We service and install DuraFlex liners, HeatShield cerfractory flue repair systems, Olympia Chimney products, Famco vents and accessories, and Copperfield chimney supplies. Our sweeps cross-train on all major professional-grade brands, so we can service mixed-system chimneys and recommend the right product for your specific flue, appliance, and budget.
FAQs - Gelco Chimney Cleaning Service in Boston
No. We are an independent chimney company and are not authorized, sponsored, or warranty-endorsed by Gelco. We service Gelco products regularly as an independent provider, using OEM-compatible and quality aftermarket parts that maintain safe, code-compliant operation.
We use genuine Gelco parts when available and when lead times are reasonable. When OEM parts are discontinued or backordered, we use quality aftermarket equivalents matched to the original alloy, diameter, and temperature rating. We never substitute builder-grade hardware.
Most Gelco sweeps, inspections, and cap replacements are completed in a single visit of two to four hours. Full liner replacements require a return visit for installation. We give you a clear timeline before booking, and we show up when we say we will.
We service and install Gelco Flex King Pro, Flex King HD, multi-flue stainless caps, single-flue caps, and top plates. If you’re unsure which model you have, we can identify it during inspection and confirm parts availability before any work begins. Call (857) 597-5950 to schedule.
We cannot extend or enforce manufacturer warranties as an independent service provider. However, our work is performed to NFPA 211 standards using compatible parts, which preserves the operational integrity of your system. We document all work in detail, which many owners find useful if warranty questions arise later.
Quincy Gelco service and Boston-area chimney sweeping with Level 2 inspection typically runs $250-$400 depending on flue length, accessibility, and how packed the liner is with creosote. Cap screen or gasket replacement adds $150-$300. Full liner replacement is quoted individually after inspection. We provide no-hassle upfront pricing - the number on the estimate is the number on the invoice. Call (857) 597-5950 for an exact quote. Estimates are free.
Yes. The corrugated stainless wall of a Flex King Pro or HD liner traps creosote differently than smooth clay tile. A standard wire brush can damage the corrugation or push debris into seam valleys. We use polypropylene or specially sized stainless whips that clean without scoring the metal, followed by vacuum extraction and camera verification.
Often just the screen. If the cap frame, legs, and mounting hardware are sound, we remove the old screen and install a compatible stainless replacement in the field. We only recommend full cap replacement when the frame is corroded, legs are stripped, or the cap no longer seats squarely on the flue tile.
The gasket between the top plate and chimney crown has dried and cracked, likely accelerated by freeze-thaw cycling. Water enters the gap, freezes, and widens it. We replace the gasket and reseal with a compatible crown sealant rated for Boston’s temperature swings. If the crown itself is spalling, we’ll show you the damage and discuss repair options.
Schedule a Level 2 if you’ve had a chimney fire, if you’re buying or selling the home, if you’ve changed appliances, or if you smell smoke or exhaust inside the house. For Gelco liners specifically, we also recommend Level 2 if the liner is more than ten years old in wood-burning service, since corrugation valley creosote can hide seam damage that a basic sweep won’t reveal.
Yes, and we prefer to. The liner and cap function as a system - draft problems often stem from interaction between the two. We inspect, sweep, and repair both in one trip when possible, which saves you a second scheduling cycle and lets us verify the whole system is working before we leave.
Book Your Gelco Service in Boston, MA
If the chimney’s doing its job, you won’t notice it. You hire us so it stays that way. Call (857) 597-5950 any time - a live person answers, 24 hours a day, seven days a week. We’ll schedule your free estimate, show up when we say, and back the work with the 90-Day Done Right Promise in writing. No arguing. Done right, and we stand behind it.
Written by Russell Haines, Owner at Hearthstone Chimney Co., serving Boston since 1984.