Sweep & inspection
Caps & crowns
Flue relining
Masonry repair
Gas fireplace serviceLevel 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.
Gelco Chimney Cleaning in Mount Prospect, IL | Duke Chimney Sweep
If you own a home in Mount Prospect and have a Gelco flexible liner running through your chimney, we’re the crew you call to clean and inspect it correctly. We provide independent Gelco chimney cleaning service across all of Mount Prospect’s 60056 ZIP code, and the one thing that makes our work here different is simple: we know these liners fail at the top plate on gable-end chimneys before they fail anywhere else. Call (844) 660-6510 to book your cleaning and inspection.
As an independent provider, we service and clean Gelco sales & service systems without any manufacturer affiliation. What that means for Mount Prospect homeowners is straight talk: we tell you what’s actually wrong, whether the liner can be saved, and what it’ll cost before we touch anything.
Why Mount Prospect Residents Choose Us for Gelco Service
Gelco’s stainless flexible liner systems are common in Mount Prospect because the village’s postwar housing stock was built around original clay-tile flues, and those tiles crack. The fix for decades has been sliding a flexible stainless liner down through the old clay, and Gelco made a lot of the liners that ended up in these homes. Our crew has re-lined, inspected, and corrected hundreds of Gelco installations across Mount Prospect’s ranch and split-level blocks.
Rob Szymanowski, our owner, grew up in Wheeling and spent enough winters near the Chevy Chase Country Club area to develop a healthy respect for what a poorly maintained chimney can do to a house. He learned the mechanical and safety fundamentals at Harper College in Palatine, then spent years working chimneys across Cook and Lake counties before founding Duke Chimney Sweep. When we show up at a Mount Prospect home for a Gelco cleaning, we arrive with the right liner components on the truck and the field experience to know what we’re looking at. Our team works with genuine Gelco top plates and caps where they fit correctly, and we stock quality aftermarket stainless components for the odd flues where a Gelco-specific part was a poor match from the start. This is full venting system specialist work, not a brush-and-go sweep.
Styles & brands we work with
Common Gelco Chimney Cleaning Problems We Solve in Mount Prospect
Here’s what we find when Gelco liners in Mount Prospect start acting up, and why this village’s specific conditions make each problem more likely:
- Insulation jacket breakdown at the crown. Gelco pre-insulated sections crumble when meltwater from Mount Prospect’s freeze-thaw cycles seeps through a cracked crown and sits against the liner insulation. By the time we clean the flue, the jacket often comes out in chunks. We clean what’s left, then address the crown so the replacement liner or insulation doesn’t get ruined the same way.
- Top-plate and cap seal failure. On Mount Prospect’s postwar brick ranches and split-levels, the chimney crown takes a beating every winter. Snow and ice load the top plate, and once the seal lets go, water wicks down the flex liner and rusts the stainless at the flue collar. This is the most common Gelco failure we correct in the 60056 ZIP code.
- DIY-installed liners with draft problems. A lot of Mount Prospect homeowners bought a Gelco Therma-Flex kit and installed it themselves behind a fireplace insert that replaced the old furnace flue. If the liner has a gap at the damper or smoke chamber because it wasn’t sized to the ovalized clay tile, you get smoke blowback and heavy creosote accumulation. We clean what’s there and can re-fit the liner properly.
- Liner kinking at offset clay tiles. Older Mount Prospect chimenys often have slight offsets in the original clay tile where the Gelco liner enters the smoke chamber. If the liner wasn’t supported there, it kinks, pulls, or separates. During a cleaning we inspect these transitions carefully, because that’s where a hidden gap becomes a carbon monoxide risk.
- Uncapped flues collecting animal nesting. We referenced this earlier: uncapped chimneys on gable-end ranch blocks around Northwest Highway are magnets for bird nesting and squirrel activity. Gelco liners with no cap let all of that material fall down onto the top plate and into the liner body itself. A proper cap with a bird screen stops this before it gets expensive.
Gelco Service in Mount Prospect: What Local Conditions Mean for Your Equipment
Mount Prospect’s chimney work is shaped by its large stock of postwar (late 1940s to 1960s) brick ranches and split-levels built as the village boomed along the Northwest Line. These are original masonry chimneys serving now-upgraded furnaces and fireplaces, and in many cases someone slid a Gelco liner through the old clay tile decades ago and then forgot about it. The issue specific to Mount Prospect, and the one we write about here because it actually shows up on service calls, is where these liners sit. On the older ranch blocks off Northwest Highway and around the Prospect Heights border, original chimneys often sit on the gable end exposed to whatever winter wind howls off the open suburban grid, so we also offer Gelco repair in Prospect Heights. That means the Gelco top plate takes the full prevailing wind and ice load every single year. The liner body might still be sound for another fifteen years, but the top seal will fail first, lift, and let meltwater run down along the insulation. In Mount Prospect specifically, we tell owners to check the Gelco top plate before assuming the liner inside is bad. This isn’t true in Hoffman Estates or Schaumburg, where chimneys sit on different exposures and homes are newer. Here, the top plate is the weak point.
Gelco Models & Products We Service in Mount Prospect
We work on the full Gelco lineup that ended up in Mount Prospect’s older homes: Therma-Flex stainless flexible liner kits, Thermix pre-insulated liner sections, and the ovalized flexible profiles used to squeeze through the original clay flues on postwar ranches. We also service the Gelco top-plate and cap assemblies sold with those kits, because that’s where Mount Prospect’s weather does its work. When a Gelco part fits correctly, we install it. When a flue is oddly sized or a retrofit insert left the opening tight, we use quality aftermarket stainless flex liner, insulation wrap, and caps that fit better. We always tell you which route we’re taking and why.
See the difference
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After
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AfterGelco Service Pricing in Mount Prospect
A standard chimney cleaning and inspection in Mount Prospect, with Gelco liner service included, typically runs $199 to $349. Level 2 inspections, which we recommend for older liners with known water entry or animal nesting, run $350 to $600. If a Gelco top plate needs replacement alongside the cleaning, expect $150 to $400 for the part on top of labor. Liner replacement ranges from $2,500 to $6,000 depending on flue length, liner diameter, and how much demolition the access point requires. Every job starts with a free camera inspection and written estimate, so you’ll see exactly what we see before approving anything. Rob’s line is this: Tell me what you’re seeing, and I’ll tell you what it actually means. Call (844) 660-6510 for an exact quote on your Mount Prospect chimney.
Serving Mount Prospect, IL — Our Local Coverage Area
We’re based in the Mount Prospect area and know this community well, with Gelco service in Arlington Heights nearby. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Gelco Chimney Cleaning in Mount Prospect
Yes, we service and clean Gelco liners installed by anyone. We’re an independent provider, not manufacturer-affiliated, so we work on liners from every installer. We’ll inspect what’s there, clean it, and tell you honestly whether it was installed correctly or needs correction. Call (844) 660-6510 to schedule.
Mount Prospect’s postwar ranch homes often have gable-end chimneys that sit perpendicular to the roofline, so the Gelco top plate takes the full brunt of every winter storm. Freeze-thaw cycles and ice load work the seal loose. We replace the top plate with a better-seated fit and add a proper cap with a rain shield and bird screen to stop the water path. If yours is failing repeatedly, the crown beneath likely needs repair too. Call (844) 660-6510 for a free inspection.
For any Gelco liner in a Mount Prospect home built before 1970 that has not been inspected in more than two years, yes. A Level 2 inspection puts a camera through the liner and into the smoke chamber so we can see separation, kinking, or rust that a visual sweep would miss. It’s the only way to catch what happens between the liner and the original clay tile. Call (844) 660-6510 to schedule a Level 2 with a full report.
We can. These are some of the most common Gelco installs we see in Mount Prospect, and they tend to have draft problems because the liner doesn’t always mate correctly with the insert body. We’ll clean the liner, camera it from both ends, and tell you if the draft issue is the liner, the insert, or the smoke chamber. If it’s a fitting issue, we can correct it without replacing the whole system in most cases. Call (844) 660-6510 to book.
A proper cap with a bird screen and rain shield prevents most animal nesting and direct rain entry into the liner, which is what kills Gelco liners from the inside. But spalling brick and cracked mortar happen outside the liner, in the masonry itself. So capping the flue helps the liner; repairing the crown and repointing the brick helps the chimney. We do both in Mount Prospect and can quote them together, and we also provide Gelco service in Des Plaines. Call (844) 660-6510 for a free estimate.
Service Areas Near Mount Prospect
Duke Chimney Sweep covers all of Mount Prospect and the surrounding northwest suburbs, including Schaumburg, Hoffman Estates, Roselle, Hanover Park, Medinah, and South Barrington. We also provide Gelco service in Glendale Heights and Gelco service in Addison for homeowners with Gelco liners in those villages. Check our Mount Prospect service area page for full coverage details.
Book Your Gelco Service in Mount Prospect Today
If you have a Gelco liner that hasn’t been inspected in the last two seasons, or you’re seeing signs of water around the top plate, let’s get a camera on it before the next freeze. Call (844) 660-6510 for a free estimate, or book a Level 2 inspection to document exactly what’s happening inside your flue. Same-week appointments are available across Mount Prospect.
Written by Rob Szymanowski, Owner at Duke Chimney Sweep, serving Mount Prospect and the northwest suburbs, including Rolling Meadows Gelco service.