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.
Why Crystal Lake Homeowners Choose Gelco Chimney Cleaning
Level Two Chimney Crystal Lake provides independent Gelco chimney cleaning, repair, and cap replacement throughout Crystal Lake and McHenry County. We are not affiliated with or authorized by Gelco; we are an independent service provider with 15 years of hands-on experience diagnosing how Gelco 316L stainless liners and cap assemblies fail in northern Illinois freeze-thaw conditions. Every Gelco job starts with a camera-scan inspection and a written price before any work begins - no exceptions.
Call us at (815) 923-3185 for a free estimate.
Why Trust Level Two Chimney Crystal Lake for Your Gelco Chimney Cleaning?
Corrine Halstead, our owner, grew up in Queens and learned her trade fundamentals at Apex Technical School in Long Island City before moving her work to the Chicago suburbs. She and our crew have been inspecting and cleaning chimneys across Cary and Crystal Lake for years, including the older fireplaces near Three Oaks Recreation Area where masonry shows its age. What she’s known for is calling a job straight - if the liner is fine, she says so, even when that means less work for us.
We started documenting every inspection with camera footage in 2009, years before insurers or regulators asked for it. That practice became Clause 4 of the Haven Standard. On Gelco systems, that means we don’t guess at liner condition. We run the camera down the full flue, photograph the cap assembly from the roof, and show you the creosote class, creases, or corrosion before we quote any Chimney Cleaning & Sweep work. The camera doesn’t argue - and neither does a written price.
Our technicians carry Gelco-compatible clamps, adapters, and transition fittings for upsize and downsize liner connections. We don’t force-fit generic hardware and hope it seals. For Crystal Lake homeowners with Gelco liners in exterior chimneys, that specificity matters: McHenry County’s freeze-thaw cycles loosen connections that held fine in milder winters, and a mismatched clamp band will leak water into your smoke chamber by spring.
Common Gelco Chimney Cleaning Problems We Fix in Crystal Lake

- Cap mesh screens corroded shut from creosote mist and lake-effect moisture. Crystal Lake’s position at the northern edge of the Chicago metro means more freeze-thaw days than communities to the southeast, and the combination of wood smoke condensate plus cycling moisture rusts Gelco multi-flue cap screens into solid sheets. We see this on East Side Drive and the older shoreline blocks every spring - the screen looks intact from the ground, but the mesh openings are bridged with glazed creosote and corrosion. Draft fails on cold starts. Smoke rolls into the living room. We replace the cap with a Gelco-compatible stainless unit with wider mesh and verify draft with a smoke pencil before we leave.
- Liner top plates and clamp bands loosening after thermal cycling. Gelco top plates seal the liner to the chimney crown with a gasket and compression band. In Crystal Lake’s extended heating season - October through April, often with daily fires - that band expands and contracts thousands of times. The gasket dries out. The band loosens. Water drips down the outside of the flue into the smoke chamber, where it mixes with soot and accelerates masonry deterioration. Our camera inspection catches the drip pattern before stains appear on your fireplace face.
- Flexible liner sections creased or kinked at the smoke shelf offset. Gelco 316L liners are rated for gentle bends, but we’ve found installations in converted lake cottages where a previous technician forced the liner past a smoke shelf with too small a bend radius. The crease traps creosote, creates a turbulent zone that worsens draft, and in extreme cases weakens the stainless wall. Our camera shows the crease in profile; if it’s minor, we smooth the transition and monitor annually. If it’s sharp or deep, we quote replacement because a creased liner in a heavy-use Crystal Lake winter is a chimney fire waiting for ignition.
- Hinged cap lids seized open or shut by rust. Gelco single-flue caps with hinged clean-out lids are designed for seasonal access, but Crystal Lake’s hard winters and humid summers corrode the hinge pin. A lid stuck open lets rain straight down the flue. A lid stuck shut prevents inspection and accelerates creosote glaze at the top of the liner where the flue is coolest. We stock Gelco-compatible replacement caps and can often free a lightly seized lid, but we won’t charge you for a repair that’ll fail again in six months.
- Insulation wrap degradation in exterior chimneys. Gelco’s 1/2″ foil-faced insulation wrap kit is specified for NFPA 211 compliance in many installations, but in Crystal Lake’s exterior chimneys - especially the unheated chase walls common in 1980s tract construction - the wrap can settle or get moisture-compromised if the crown cracks. Cold flue gases condense more creosote. The liner runs cooler, which actually increases buildup rates. We inspect wrap condition with the camera and a borescope at connection points, and we rewrap or replace when the foil facing is torn or the insulation is compressed.
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AfterGelco Parts & Our Repair-vs-Replace Approach
We carry Gelco-compatible stainless caps, top plates, and clamp bands from quality aftermarket fabricators when Gelco has discontinued the original part. We’ll tell you honestly when a $180 cap refresh extends your liner’s life versus when the liner itself is creased, pitted, or wall-thinned past safe use.
For inserts and dampers, we quote OEM when the Gelco housing is intact and a factory-matched component is still available. We don’t source mystery parts through generic hardware catalogs. Every part we install is traceable to a manufacturer with a warranty we can put in writing.
Our materials come through Haven’s buying network - DuraFlex, HeatShield, Gelco, Olympia Chimney, Famco, and Copperfield - specifically to keep customer prices honest. No markup games. Call (815) 923-3185 and we’ll give you a written price before any work starts.
Our Gelco Service Process - Step by Step

- 1
Camera-scan diagnosis. We run an NFPA 211 Level 2 inspection with a chimney camera down the full Gelco liner length, photographing the cap assembly, top plate, liner walls, and connection to the appliance. You see what we see. Clause 4 of the Haven Standard requires this photo record on every job.
- 2
Written scope and price. Before any brush touches your flue, we deliver a written price, written scope, and written warranty. Haven Standard Clause 1 - Have it in writing. No verbal estimates, no “we’ll see how it goes” pricing.
- 3
Repair or installation with documented steps. We photograph before, during, and after: the old cap removed, the liner condition at the top plate, the new component seated and clamped. For waterproofing jobs, we note coverage rates and product batch numbers.
- 4
Draft and function testing. We verify proper draft with a smoke pencil or manometer, check that hinged lids operate freely, and confirm mesh screens are clear. On insert reconnections, we run a combustion air check.
- 5
Warranty documentation. You receive the photo record, the written warranty, and our 365-Day Done Right Promise. If it’s not done right, we make it right. No paperwork chase - it’s in your hand before we leave.
Gelco Products We Service & Install in Crystal Lake
We work with Gelco 316L stainless flexible chimney liner in 6″ and 7″ ID, Gelco multi-flue stainless chimney caps with mesh spark screen, Gelco single-flue caps with hinged clean-out lid, and Gelco liner insulation wrap kits in 1/2″ foil-faced. We stock common cap sizes and clamp bands for fast turnaround on Crystal Lake service calls.
For full liner replacements or upsize transitions, we order factory-length Gelco-compatible sections through our Haven network and schedule installation when materials arrive - typically within a week for standard sizes.
We Also Service These Brands

Our technicians are equally familiar with DuraFlex flexible liners and HeatShield cerfractory flue sealant systems. Multi-brand capability means we don’t try to make a Gelco part fit where a DuraFlex transition is the right call, and we won’t sell you a full liner reline when HeatShield resurfacing is the honest repair for your smoke chamber. Independent expertise, not brand loyalty.
FAQs - Gelco Chimney Cleaning Service in Crystal Lake
No. We are an independent Gelco service provider, not affiliated with or authorized by Gelco. We service Gelco products based on field experience with their 316L liners and cap assemblies in northern Illinois conditions, not factory training. Our 365-Day Done Right Promise and Haven Standard documentation apply to all work we perform. Call (815) 923-3185 for a free estimate.
Usually no. Gelco cap screens are welded to the frame, and by the time they’re clogged with glazed creosote and corrosion, the frame itself is compromised. We replace the entire cap with a Gelco-compatible stainless unit that has wider mesh spacing and better creosote shedding. In Crystal Lake’s freeze-thaw climate, the new cap typically lasts 8-12 years versus 4-6 for the original. Call (815) 923-3185 for an exact quote - estimates are free.
A camera inspection shows the difference. A dirty liner has uniform soot coating with smooth walls. A creased liner shows a sharp fold, kink, or wall deformation that traps creosote and creates a turbulent zone. We measure crease depth and wall thinning; if the crease exceeds manufacturer bend radius specs or the stainless is work-hardened and pitted, we quote replacement. If it’s minor, we smooth the transition and re-inspect in 12 months. Call (815) 923-3185 to schedule a camera scan.
Yes, for NFPA 211 compliance and practical performance. Crystal Lake’s exterior chimneys - especially unheated chase walls - drop flue gas temperatures below the dew point, which condenses more creosote and accelerates corrosion. Gelco’s 1/2″ foil-faced insulation wrap maintains flue temperature, improves draft, and reduces buildup rates. We inspect wrap condition during every Level 2 inspection and rewrap when the foil facing is torn or insulation has settled. Call (815) 923-3185 for a written quote on rewrap or replacement.
Often yes, if the liner itself is sound. We remove the old gasket, clean the mating surfaces, install a new high-temp gasket, and re-torque the clamp band to Gelco spec with a torque wrench - not by feel. We then camera-verify the seal and photograph it. If the liner wall is creased, pitted, or the top plate is cracked, we quote replacement honestly. No upsell. Call (815) 923-3185 for an inspection and written price.
No. Corrine Halstead built this company on calling jobs straight. If your Gelco liner is clean, uncresed, and properly connected, we’ll sweep it, replace the cap if needed, and tell you to call us back in a year. We’ve walked away from liner replacements when the camera showed adequate wall thickness and proper installation. The written price we give you reflects what you actually need - not what we’d prefer to sell. Call (815) 923-3185 for an honest assessment.
Gelco chimney cleaning in Crystal Lake typically runs $189-$289 for a standard sweep with NFPA 211 Level 2 camera inspection and photo documentation. Cap replacement adds $180-$340 depending on size and access. Full liner replacement with Gelco-compatible 316L stainless and insulation wrap ranges $2,800-$4,500 for most single-flue residential chimneys. Every price is written and agreed before work starts - Haven Standard Clause 1. Call (815) 923-3185 for an exact quote on your specific Gelco system; estimates are free.
Book Your Gelco Service in Crystal Lake, IL

Call (815) 923-3185 to schedule your Gelco chimney cleaning, inspection, or repair. We’ll send a background-checked, uniformed technician with a named appointment window and a text when they’re en route. You’ll get a camera-scan inspection, a written price before any work begins, and a documented photo record when it’s done - backed by our 365-Day Done Right Promise. Live phone support, 24 hours a day, 7 days a week.
Written by Corrine Halstead, Owner at Level Two Chimney Crystal Lake, serving Crystal Lake since 2009.





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