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 Onion Creek, TX | Ashton Chimney
We provide independent Chimney Sweep – Onion Creek Gelco service across Onion Creek, TX (78747), and if there’s one thing that makes our Gelco work here different, it’s this: a cleaning visit in Onion Creek often uncovers flood-era damage that a standard sweep misses. The 2013 and 2015 Onion Creek floods left silt lines, rusted dampers, and water-damaged mortar in fireboxes that look fine from the hearth. That’s why we treat nearly every Gelco cleaning here as a Level 2 inspection first, then a sweep. Call (855) 507-9184 if your Gelco fireplace hasn’t been looked at since before the floods, or since last winter, whichever came first.

Why Onion Creek Residents Choose Us for Gelco Service
Most of the Gelco units we open up in Onion Creek are the Heat-Circulating Series wood-burning fireplaces that went into 1990s and early-2000s production homes, along with a solid share of direct-vent gas models in the newer and rebuild stock. We’ve been tearing down, sweeping, and rebuilding Gelco fireplaces across South Austin, including Manchaca Gelco service calls, long enough that the damper hardware, firebox panels, and venting quirks feel familiar before we even pull the first bolt. That matters when a rusted damper pivot or a hairline-cracked refractory panel is the difference between a one-visit fix and three trips of guessing.
Nolan Pruett, our owner, started in this trade through the Building Trades program at Austin Community College’s Round Rock Campus and spent his twenties working fireplaces and flues across the Austin metro before planting roots in his own backyard. He’s the guy we send when a Level 2 inspection turns up a liner problem someone else dismissed. He’ll also tell you the same thing we tell every Onion Creek homeowner: we’re an independent chimney service, not authorized by Gelco, but we carry the direct experience that comes from years of Gelco teardowns and rebuilds. For full-service Gelco sales & service support and repair work, we handle everything in-house.
We’re not just familiar with Gelco. We’re familiar with Onion Creek, the 78747 zip code, the slab-on-grade construction, the golf-course subdivision layouts, and the way a fireplace that sat idle through a Central Texas summer behaves on that first cold snap in November. That combination is why homeowners here call us instead of a generic sweep company from north Austin or looking for Buda Gelco service elsewhere.
Styles & brands we work with





Common Gelco Chimney Cleaning Problems We Solve in Onion Creek
- Rusted and seized dampers. Onion Creek heat and humidity plus months of idle fireplaces means Gelco damper blades and pivot pins corrode solid. We see this most on the first cold snap call, when the homeowner tries to open the flue and it won’t budge. We free or replace the damper before any sweep happens.
- Cracked refractory firebox panels. Gelco factory-built units use refractory brick or ceramic panels that spall and hairline-crack after rare hard freezes, especially in Onion Creek homes that sat vacant or were rebuilt post-flood. A panel that looks fine from the hearth can be one fire away from exposing the metal shell.
- Water intrusion at the top plate and crown. Many Gelco installations in Onion Creek have original steel multi-flue caps or crowns that channel rain into the flue. Over a few seasons, that rusts the firebox and washes out mortar joints. We check the crown first, before we ever put a brush up the flue.
- Animal nesting and hardened creosote. Because fireplaces sit idle for months in Central Texas heat, Gelco flues in Onion Creek routinely draw birds and squirrels. Glazed creosote can harden to the point that a standard sweep won’t safely clear it. We see both, often in the same chimney.
- Post-flood silt and rust that rebuilds missed. The floods left silt lines inside Gelco fireboxes and rusted dampers that look fine from the hearth. If your home was rebuilt or repaired after 2013 or 2015, there’s a real chance the fireplace never got a proper inspection. We find what the rebuild crew skipped.
Gelco Service in Onion Creek: What Local Conditions Mean for Your Equipment
Here’s what makes Onion Creek different from, say, a 2005 subdivision in Round Rock. The 2013 and 2015 Onion Creek floods inundated thousands of homes to several feet. We’ve opened Gelco fireboxes in the master-planned neighborhoods near the golf course and found silt lines two or three inches up the firebox wall, dampers rusted solid at the pivot, and mortar joints washed out behind the veneer. The homeowner looks at the fireplace, it looks fine from the hearth, and they assume the rebuild covered it. It usually didn’t. Fireplaces were low on the rebuild priority list after the floods, and a lot of them sat untouched for years. So when a homeowner here calls us for a “simple Gelco cleaning,” we treat it as a Level 2 inspection first. We’re checking the firebox, the damper, the flue, the crown, the cap. Then we sweep. That sequence has prevented more chimney fires and carbon monoxide problems in Onion Creek than any brush ever has. It’s also why our Onion Creek service area coverage runs differently than our work in drier, flood-untouched suburbs.
Gelco Models & Products We Service in Onion Creek
We work on the full range of Gelco factory-built equipment common in Onion Creek: the Heat-Circulating Series wood-burning fireplaces from the late-1990s and early-2000s, See-Through and Multi-Sided units, Direct-Vent Gas fireplaces, and Wood-Burning Fireplace Inserts. When a part needs replacing, we source OEM-equivalent Gelco dampers, firebox panels, and caps where they’re still available, and high-quality aftermarket parts when OEM has been discontinued. We don’t grab a one-size substitute off a shelf and force it to fit. If your Gelco firebox is beyond sensible repair, we’ll say so plainly and talk through whether a rebuild or conversion makes more sense than throwing parts at a unit that’s reached the end of its working life.
See the difference
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AfterGelco Service Pricing in Onion Creek
Gelco chimney cleaning in Onion Creek typically runs between $199 and $349 depending on condition, access, and whether the unit has flood-era damage that needs documenting before a sweep can safely happen. A Level 2 inspection is a separate line item and generally falls in the $149 to $299 range. Damper repair, refractory panel replacement, and crown waterproofing are quoted after we’ve actually looked at the unit, and we’ll show you photos of what we found before any repair work is approved. Nothing gets recommended without camera evidence you can see. Call (855) 507-9184 for a free estimate on your Gelco unit, and we’ll give you a straight number before we book.

Serving Onion Creek, TX — Our Local Coverage Area
We’re based in the Onion Creek area and know this community well, and we also handle Gelco repair in Shady Hollow. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Gelco Chimney Cleaning in Onion Creek
Most of the time it’s a damper that won’t fully open or a flue that’s blocked by nesting or hardened creosote. In Onion Creek specifically, we also see rusted damper pivots and silt-caked flues from the flood years that restrict airflow enough to push smoke back into the room. The fix depends on what we find, but it starts with an inspection, not a guess. Call (855) 507-9184 and we’ll diagnose it properly.
Yes, and frequently the rebuild didn’t address it. The floods left silt lines inside fireboxes, rusted dampers, and water-damaged mortar that look invisible from the hearth. Rebuild crews focused on drywall, flooring, and electrical. Fireplaces were not the priority. We’ve opened dozens of post-flood Gelco units in Onion Creek and found damage the homeowner never knew existed.
Usually, yes. We free the pivot, replace the damper blade or assembly as needed, and coat the surrounding metal to slow future corrosion. Damper replacement is a small fraction of the cost of a new fireplace or a liner rebuild. If the firebox itself is too far gone, we’ll tell you honestly and show you why. Call (855) 507-9184 for an assessment.
Once a year, ideally before the first cold snap. Gas fireplaces still accumulate dust, spider webs, and debris in the burner and venting, and a direct-vent Gelco unit needs its venting checked for blockages and rust just like a wood-burning unit. Annual service also catches small problems before they become expensive ones. Call (855) 507-9184 to schedule.
We clean the crown, repair any cracks with a sealant rated for masonry and metal, and apply a breathable waterproofing coating that sheds water while letting trapped moisture escape. Onion Creek rain tends to pool on flat Gelco top plates, so this is one of the highest-value repairs we do here. It prevents crown cracking, firebox rust, and mortar deterioration from getting worse. Call (855) 507-9184 for a crown assessment.
Service Areas Near Onion Creek
We also cover Gelco chimney and fireplace work in nearby Central Texas communities. If you’re in Gelco service in Dripping Springs, Gelco service in Garfield, Cedar Park, Anderson Mill, or Brushy Creek, the same team handles your chimney. One call covers sweep, inspection, and any repair work.
Book Your Gelco Service in Onion Creek Today
If your Gelco fireplace hasn’t been inspected since the floods, or it’s been a year since the last sweep, now’s the time. Call (855) 507-9184 and we’ll get your Gelco unit inspected, cleaned, and any surprises documented before they turn into expensive problems. Estimates are free.
Written by Nolan Pruett, Owner at Ashton Chimney, serving Onion Creek and the greater Austin metro area.