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.
Gelco Chimney Cleaning in Marietta, GA | Level Two Chimney Kennesaw
Gelco chimney cleaning & sweep in Marietta and repair typically runs $195-$425 for a full Level 2 inspection with sweep, depending on creosote buildup severity and whether your prefab firebox needs refractory panel work. We’re an independent Gelco service provider, not manufacturer-affiliated, and we’ve rebuilt hundreds of these aging units across Marietta’s 1970s-80s subdivisions. Call (678) 535-2204 for a written estimate before any work starts.
Why Marietta Residents Choose Us for Gelco Service
Corrine Halstead, who runs our crew, grew up in Queens and came south after completing her chimney and heating systems coursework at Apex Technical School in Manhattan. She spent years on rooftops and inside fireboxes before putting her name on an operation, and her one standing rule hasn’t changed: she won’t leave a homeowner guessing about what they’re looking at. That means camera stills, written findings, and a written price before anything gets scheduled.
We’ve worked on Gelco factory-built fireplaces across Marietta service area long enough to know their exact construction quirks - the original refractory panels, the high-temperature gaskets, the way the steel firebox walls fail from the outside in after decades of Piedmont weather. Gelco sales & service is a core part of what we do, but our credibility comes from hands-on familiarity with Cobb County’s aging Gelco stock, not a manufacturer badge.
Every visit includes an NFPA 211 Level 2 camera-scan inspection with a documented photo record - Clause 4 of the Haven Standard, a practice we’ve run continuously since 2009. You’ll get a written scope, written price, and written warranty before anyone picks up a tool. We write it down before we ask you to decide anything.
Common Gelco Chimney Cleaning Problems We Solve in Marietta

- Cracked refractory firebox panels and rear brick liners - Marietta’s heavy fall rains drive moisture into unsealed Gelco units, then winter freeze-thaw cycles spall the already-weakened material. We see this constantly in the ranch and split-level tract homes built during Cobb County’s 1970s-80s buildout, where these prefab fireplaces are now 40-50 years old and well past their rated lifespan.
- Corroded and warped steel firebox components and dampers - After four decades of humid subtropical exposure, dampers seize open or shut. A stuck-open damper bleeds heat all winter; stuck-shut, it traps moisture and combustion gases. Either way, you’re losing efficiency and inviting water damage.
- Seized or broken damper handles and pivot pins - Gelco’s original hardware becomes brittle with age. We often find them frozen from creosote and rust, especially in homes near Marietta Square with original soft lime-mortar chimneys that stay damp longer than the newer masonry in East Cobb.
- Failed gaskets and warped glass doors - Marietta’s occasional ice storms and heavier seasonal fireplace use stress these parts beyond their rated life. Smoke spillage and uncontrolled air infiltration follow, sometimes filling the room with odors before you ever light a fire.
- Moisture intrusion through uninsulated chimney chases - In Marietta’s 1970s-80s tract subdivisions, original Gelco zero-clearance fireplaces were often installed with minimal or no exterior chase insulation. After 40+ years of Piedmont freeze-thaw cycles, the metal firebox walls are failing from the outside in. We rarely see this pattern in newer suburbs where the same models were built later with updated clearances and wraps.
Before
AfterGelco Service in Marietta: What Local Conditions Mean for Your Equipment
In a split-level ranch off Sandy Plains Road in East Cobb, we inspected a 1979 Gelco heat-circulating fireplace and found the rear refractory panel cracked in three places with rust bleeding through the steel firebox wall - a failure our tech traced to a missing rain cap and years of water intrusion that had soaked the chase. We replaced the refractory panels, rebuilt the damper assembly with a stainless aftermarket unit, installed a custom multi-flue cap, and applied crown coating to stop further moisture entry; the homeowner now has a safe, fully functional fireplace for the first time in a decade - a chimney repair in Marietta done right.
This is the Gelco failure cycle specific to Marietta: heavy annual rainfall drives water into any uncapped or crown-cracked chimney, and because the city sits slightly higher in the Piedmont foothills than Atlanta’s core, it gets a few more hard freeze events per season. That combination - saturated brick followed by freeze-thaw - destroys Gelco prefab fireboxes from the outside in, not from fire damage within. In the historic blocks radiating off Marietta Square, particularly along Whitlock Avenue, technicians routinely find soft lime-mortar joints recessed a half-inch or more into the brick face after a century of acid rain and humidity cycling. These chimneys need tuck-pointing with matched lime-based mortar, not modern Portland cement, which traps moisture and accelerates spalling. It’s a nuance that rarely comes up in the 1970s-80s tract-home calls that make up the bulk of Marietta’s ticket volume, but when it does, the wrong repair makes things worse.
Gelco Models & Products We Service in Marietta

We work on the full range of Gelco equipment found in Marietta homes:
- Gelco zero-clearance prefabricated fireplace (pre-1990) - The most common unit in Marietta’s mid-century subdivisions; we stock aftermarket refractory panels and dampers matched to original specs.
- Gelco heat-circulating fireplace - With grilles and optional blower; blower motor and heat-exchange tube failures are typical after 35+ years.
- Gelco wood-burning fireplace insert - Often original equipment in tract homes; liner connection and clearance-to-combustibles issues require camera verification.
- Gelco gas-log fireplace - Found in later conversions and East Cobb decorative installs; venting and liner inspections still required annually despite low wood use.
OEM Gelco parts are largely discontinued, so we source high-quality aftermarket refractory panels, dampers, and gaskets tested for high-temperature performance. We never use cheap substitutes. If structural failure extends into the framing, we’ll tell you honestly when repair is unsafe and a full insert or rebuild makes more sense.
Gelco Service Pricing in Marietta
| Service | Price Range |
|---|---|
| Level 2 inspection with chimney sweep | $195 - $285 |
| Refractory panel replacement (aftermarket, per panel) | $180 - $340 |
| Damper repair or replacement (aftermarket stainless) | $225 - $395 |
| Firebox repair (labor + materials) | $450 - $875 |
| Custom multi-flue cap installation | $320 - $550 |
| Crown coating / moisture sealing | $275 - $425 |
What drives cost: accessibility (roof pitch, chase height), creosote class (Class III glazed requires more labor), and whether the firebox needs panel work or full replacement. Every estimate includes the camera inspection and photo documentation at no extra charge - Clause 4 of the Haven Standard. Call (678) 535-2204 for an exact quote; estimates are free and written, never verbal.
Serving Marietta, GA - Our Local Coverage Area

We’re based in the Marietta area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Gelco Chimney Cleaning in Marietta
Most can be repaired if the steel firebox walls are still structurally sound. We camera-scan to check for rust-through or framing contact; if the damage is limited to refractory panels, gaskets, and damper hardware, repair is usually straightforward and costs far less than replacement. If the firebox wall itself is compromised, we’ll show you the camera footage and recommend a safe path forward. Call (678) 535-2204 for a free inspection and written estimate.
That’s efflorescence - mineral salts left behind when water evaporates out of masonry or chase insulation. In Marietta, it means moisture is getting in, usually through a failed crown, missing cap, or chase cover with rusted seams. The musty odor comes from wet insulation and possibly mold. We trace the entry point with the camera, seal it, and dry the system. Call (678) 535-2204 and we’ll identify the source before quoting any work.
No. We access the damper through the firebox opening or the smoke chamber, depending on the unit. Gelco dampers seize from rust and creosote buildup on the pivot pins and handle linkage; we disassemble, clean, and either restore or replace with a stainless aftermarket assembly. Full removal is only necessary if the firebox itself is being replaced.
Annually, before burning season. Marietta’s heavy rainfall and Piedmont freeze-thaw cycles accelerate moisture damage to prefab fireboxes, and the NFPA 211 standard calls for yearly Level 2 inspection of all solid-fuel venting systems. Even gas-log conversions need annual venting and liner checks. We document every visit with photos under Haven Standard Clause 4.
Yes. We match lime-based mortar for historic soft-brick chimneys - critical on streets like Whitlock Avenue where Portland cement would trap moisture and destroy the masonry - and we service the Gelco insert itself as a separate system. The insert’s liner connection and clearances get camera-verified during the same visit. One crew, one appointment, documented record for both.
Service Areas Near Marietta

We run Gelco service throughout Cobb County and north metro Atlanta. Our regular routes include Gelco service in Kennesaw - where Corrine and her crew are based - plus Gelco service in Acworth, Woodstock, Fair Oaks, and Holly Springs. Same standards, same written pricing, same photo documentation on every job.
Book Your Gelco Service in Marietta Today
Call (678) 535-2204 now. A live person answers, 24 hours a day. We’ll schedule your Level 2 camera inspection, deliver a written price before any work starts, and back every job with our 365-Day Done Right Promise. If your Gelco fireplace hasn’t seen a professional inspection in the last year - or if you’re staring at white staining, rust, or a damper that won’t budge - let’s get it documented and fixed right.
Written by Corrine Halstead, Owner at Level Two Chimney Kennesaw, serving Marietta and Cobb County since 2009.





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