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 Inspection in San Antonio: What to Know First
Gelco chimney inspection in San Antonio typically runs $149 to $279 for a standard Level 1 visual check, with camera-assisted Level 2 inspections landing between $299 and $449 depending on the flue’s height and access points. We’re an independent Gelco service provider, not a factory-authorized shop, so we tell you exactly what we see without warranty-filtered language. Most inspections take 45 to 90 minutes on-site, and you get a written report with photos the same day.
If you own a Gelco chimney cap, damper, or liner component and want to know whether it’s still doing its job, this page will walk you through what we find, what it costs to fix, and when you can safely leave it alone. Call (903) 515-5079 to book an inspection with a technician you’ll know by name and photo before we arrive.
Key Takeaways
- Standard Gelco inspection in San Antonio: $149 – $279 for Level 1; $299 – $449 for Level 2 with camera.
- We are an independent Gelco service provider, not factory-authorized. We say plainly when a part is OEM, when aftermarket makes sense, and when neither is worth it.
- Typical Gelco failure points in San Antonio: cap mesh corrosion, damper cable fatigue, and liner-to-cap transition gaps. More on each below.
- Every inspection includes a written price for any repair before work starts and a 365-Day Done Right Promise on completed repairs.
- You’ll know your technician’s name and see their photo before they pull into your driveway.
Styles & brands we work with





How Gelco Products Fail – and How We Fix Them
Gelco makes solid, mid-to-premium chimney components, but San Antonio’s climate exposes specific weak points we see repeatedly. Here are the five failure modes we encounter most often on Gelco installations in this area.
- Gelco multi-flue cap mesh deterioration. The stainless steel mesh on Gelco’s larger multi-flue caps takes a beating from Texas sun and the near-constant spring winds. We routinely find the mesh separating from the frame at the corners on caps that are only five or six years old. The fix is usually mesh replacement rather than a full cap swap, and we’ll show you the damage on camera before quoting it.
- Damper cable fatigue in the Gelco top-seal damper line. Gelco’s top-seal dampers use a braided cable that runs down the flue to the firebox handle. In San Antonio homes, we see cable fraying at the pulley or at the handle crimp far more often than at the seal itself. It’s an easy miss on a quick visual inspection, which is why we run the damper through its full range of motion on every Gelco inspection, camera in the flue watching the seal seat.
- Liner-to-cap transition gaps. On Gelco installations where the cap mounts directly over a stainless liner, the transition is often sealed with a bead of silicone that hardens and cracks within a few Texas summers. We find small gaps there that let water track down the outside of the liner, which is exactly where corrosion starts. We reseal with high-temp, UV-rated sealant and verify with a water test on the spot.
- Cast aluminum base corrosion on the Gelco standard cap line. Gelco’s cast aluminum caps hold up well, but on homes near Loop 1604 or in the Hill Country’s higher humidity pockets, we see white oxidation at the bolt heads where the cap anchors to the crown. It’s cosmetic until it isn’t; once those anchors loosen, wind vibration starts cracking the crown concrete. We clean and re-anchor before that happens.
- Flue tile separation behind Gelco inserts. When a Gelco insert or stove was installed as a retrofit, the original clay flue tiles behind it were sometimes already in rough shape. San Antonio’s freeze-thaw cycles, mild as they are, still find those cracks. A camera inspection behind the Gelco unit tells us whether the old flue is still doing its job or whether it’s worth sleeving with a DuraFlex liner instead.
Our Gelco Chimney Inspection Process
- 1
Call and schedule. A live person answers, 24/7. We send you the technician’s name and photo before the visit, and that person shows you their photo ID badge at the door.
- 2
Arrival and setup. Drop cloths go down around the firebox, and we walk the roof access and flue path before anything else so you know what we’re checking and why.
- 3
Visual inspection, Gelco components first. We look at the cap, damper, and visible liner from both the roof and the firebox. Ruben Castellano and his crew have looked at enough Gelco products in San Antonio to spot mesh separation or cable wear before they become real problems.
- 4
Camera run. We send a camera down the flue and record the footage. You see stills from the video in your report; nothing gets recommended on our say-so alone.
- 5
Parts decision. If something needs repair, we tell you whether the correct fix is Gelco OEM, a professional aftermarket equivalent, or a different trade brand like DuraFlex or HeatShield, and we explain why in plain English. You get a written price before any work starts.
- 6
Report and guarantee. Written report with photos, same day. If you approved a repair, it carries our 365-Day Done Right Promise. If it fails within that year, the second visit is free.
See the difference
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After
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AfterWhat Gelco Chimney Inspection Costs in San Antonio
A straight Level 1 Gelco inspection without a camera runs $149 to $279. Level 2, which includes the camera run and is what we recommend for anyone buying or selling a home with a Gelco unit, runs $299 to $449. A Level 3, which involves partial demolition to access concealed chase areas, starts at $500 and only happens when the first two levels reveal a reason for it.
| Inspection Type | Typical Cost | What It Includes |
|---|---|---|
| Level 1 | $149 – $279 | Visual check of cap, damper, firebox, and accessible flue |
| Level 2 | $299 – $449 | Everything in Level 1 plus camera footage and condition report |
| Level 3 | $500+ | Access to concealed areas when prior levels flag a concern |
What moves the price: flue height, roof pitch and access, whether a Gelco insert is in place (which adds setup time), and whether you have a single flue or a multi-flue cap to inspect. Repairs are quoted separately, in writing, before we touch a wrench. Call (903) 515-5079 for an exact quote; estimates are free.
Why San Antonio Homeowners Call Alcott Chimney San Antonio for Gelco Work
Most chimney companies in San Antonio will inspect a Gelco product the same way they inspect anything else. We don’t. We know which Gelco caps fail at the mesh corners, which damper cables fray at the crimp, and which liner transitions leak in this climate. That’s the difference between a checkbox inspection and one that actually tells you what’s next.
We’ve been serving San Antonio homeowners since 2002 as part of the Threshold Group family. Every technician you meet has passed a background check and identity verification. You see their name and photo before they arrive, and they wear a photo ID badge at your door. Every repair comes with a written price before work begins and a written guarantee, free of charge, backed by our 365-Day Done Right Promise. We carry Gelco, DuraFlex, and HeatShield trade materials on the truck because sometimes the best fix isn’t the brand that’s already up there. When Ruben Castellano tells you a part can wait another season, you can take that to the bank – he would rather give you a straight answer today than a vague promise you have to call us back about tomorrow.
FAQs
Yes. Every repair we perform, including repairs to existing Gelco components, carries our 365-Day Done Right Promise in writing. If the repair fails within a year, we return and make it right at no charge. We also explain what remains covered under Gelco’s own warranty and what does not, since we’re an independent service provider rather than a factory-authorized shop.
We reliably schedule inspections within a few days in most San Antonio neighborhoods, and we’ll give you a time window when you call, not an open-ended “sometime Thursday.” Cameras inside the flue take 45 to 90 minutes for a standard job. Call (903) 515-5079 for current scheduling.
Both, and we tell you which is which before you pay. For caps and dampers, genuine Gelco parts usually make sense and are what we quote first. For liners and certain transition components, a professional aftermarket product like DuraFlex or HeatShield can be the better long-term value, and we’ll show you the cost and warranty difference before you decide.
Yes, and the buyer’s agent usually asks for a Level 2. A camera run catches exactly the failures we listed above: mesh separation, damper cable wear, transition gaps. Real estate inspections in San Antonio should always include at least a Level 2 camera pass, and we can schedule flexibly around escrow timelines.
The most common consequence in San Antonio is water entry at the cap-to-crown transition, which slowly cracks the crown and works its way into the masonry. It’s a multi-year process, but it’s always more expensive to fix once the crown cracks than it is to replace worn mesh or reseal a transition when we first spot it. We’ll show you the condition on camera either way, and we’ll tell you plainly if it can wait.
Written by Ruben Castellano, Owner, Alcott Chimney San Antonio at Alcott Chimney San Antonio, serving San Antonio and nearby areas.