Masonry repair
Sweep & inspection
Caps & crowns
Flue relining
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 Repair in Dallas: What to Know First
We repair Gelco chimney systems in Dallas as an independent Gelco service provider, and most jobs are completed in one visit, with a written price in your hand before any work starts. You’ll typically pay between $375 and $2,800 depending on whether we’re repointing mortar, replacing a Gelco anchor plate, or rebuilding sections of a chimney that have spalled. We are not affiliated with or authorized by Gelco, but we work on their systems every season and we know exactly where they fail in Dallas homes. If you own a Gelco chimney and something looks wrong, call (361) 492-4099 and we’ll schedule an inspection, then give you the straight answer in writing.
How Gelco Products Fail – and How We Fix Them
- Gelco Terra-Cotta Flue Liners cracking at the mortar joints. Gelco’s terra-cotta liners are common in Dallas homes built from the 1970s through the 1990s. The clay sections themselves hold up, but the mortar between them shrinks and cracks after decades of North Texas temperature swings. We see it most in chimneys on north-facing walls where freeze-thaw cycles hit hardest. The fix is a HeatShield or DuraFlex resurfacing system applied inside the existing liner, which seals the joints without a full teardown.
- Gelco chimney caps rusting through at the weld seams. Gelco caps are solid when installed, but the standard steel versions don’t love Dallas humidity and the salt-tinged air near White Rock Lake. Once the weld seams start rusting, water gets into the flue and starts eating at the mortar below. We replace Gelco caps with stainless or copper options from Gelco’s lineup or a comparable Olympia Chimney cap, and we seal the chase lip while we’re up there.
- Spalling brick on Gelco chase surrounds. When a Gelco chimney is built with a brick chase rather than a framed one, the real problem is usually water, not the brick itself. Dallas gets about 37 inches of rain a year, and a failed cap or cracked crown lets that water soak into the brick. Over time the brick faces pop off, a condition called spalling. We repair the damaged brick, then apply a vapor-permeable chimney waterproofing treatment so moisture doesn’t get trapped inside the masonry. Sealing with the wrong product is a common mistake we fix on a regular basis.
- Gelco anchor plates loosening where the liner connects at the top. The anchor plate is the metal plate at the top of the flue that holds the liner in place. On Gelco systems, the plate can shift during high winds, which we get plenty of in the spring. A loose anchor plate lets exhaust leak into the chimney cavity instead of venting outside. We reset the plate, replace the fasteners, and re-seal the connection. If the plate itself is warped, we’ll replace it with an OEM-equivalent part that matches the Gelco dimensions.
- Mortar wash and crown deterioration on Gelco chimney tops. The concrete cap on a Gelco chimney, called the mortar wash or crown, takes a beating from Dallas hail storms. Once hairline cracks open up, water seeps in and the whole top of the chimney starts to crumble. We rebuild the crown with a proper overhang and a flexible sealant joint where it meets the flue. That detail is the difference between a crown that lasts five years and one that lasts twenty.
Styles & brands we work with





Our Gelco Chimney Repair Process
- 1
You call and talk to a live person. No voicemail maze. We answer the phone around the clock, ask what you’re seeing, and schedule a time that fits your week. You get a two-hour arrival window and we hit it.
- 2
We start with a Level 2 inspection. The technician runs a camera through the flue and gets eyes on every Gelco component: liner, cap, crown, flashing, and brick. You see the photos. The camera doesn’t lie, and neither do we.
- 3
You get a written price before anything is touched. The quote is itemized, it’s in writing, and the number on the invoice matches the number you approved. No surcharge surprises, no “we found something else” upcharges mid-job.
- 4
We decide on OEM versus aftermarket parts together. Some Gelco parts are still available new. For others, a quality aftermarket equivalent from DuraFlex or Famco does the job without a performance hit. We lay out both options and what each one costs, then you choose.
- 5
The repair happens, and we test before we leave. We don’t pack up a ladder until a smoke test confirms the draw is correct and the system is sealed. Your roof gets cleaned, and any debris is hauled off.
- 6
You walk away with the 365-Day Done Right Promise in writing. Every Gelco repair we do in Dallas carries a one-year written guarantee. If a covered repair fails within that year, we return and fix it at no charge. No argument, no fine print gymnastics.
See the difference
Before
After
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After
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AfterWhat Gelco Chimney Repair Costs in Dallas
| Repair Scenario | Typical Range |
|---|---|
| Mortar repointing (tuckpointing) on a Gelco brick chimney | $375 – $900 |
| Crown rebuild with proper overhang and sealing | $650 – $1,400 |
| Spalling brick repair and waterproofing | $800 – $2,200 |
| Flashing replacement around a Gelco chimney base | $450 – $1,100 |
| Flue liner resurfacing (HeatShield or DuraFlex system) | $1,800 – $4,500 |
| Partial chimney rebuild (top 3-5 courses of brick) | $1,600 – $3,800 |
The two things that move the price most are access and liner condition. A chimney that’s three stories up with a steep roof pitch costs more to work on than a single-story ranch. And if the Gelco liner is cracked in multiple places, resurfacing costs more than a single-joint seal. We’ll give you a free estimate that spells out exactly which side of each range your job lands on. Call (361) 492-4099 and we’ll put it in writing.
Why Dallas Homeowners Call Flint Chimney Co Dallas for Gelco Work
We’ve been doing this since 2002 as part of the Garrison Partners family, and the standard hasn’t changed. Every Gelco chimney repair in Dallas comes with a written price before the job starts and the 365-Day Done Right Promise after it’s finished. If a covered repair fails within a year, you get a free return visit. That’s it. That’s the deal.
Our technicians are background-checked and wear a uniform with their name on it. You know exactly who’s on your roof. And because we work with multiple chimney product lines, including DuraFlex and HeatShield alongside Gelco, we’re not forced into one fix that happens to be the only thing we sell. If your Gelco cap needs a stainless replacement, we’ll use the right part. If your flue needs a resurfacing system, we’ll use the one that fits your chimney, not the one that fits our margin. Hank Delano runs the crew, and he’ll tell you the same thing: if the flue’s clear, we’ll tell you. If it’s not, we’ll show you exactly why.
FAQs
In most cases, no. Gelco warranties primarily cover manufacturing defects in the original components, and normal wear or weather damage to surrounding masonry is outside that scope. Since we’re an independent Gelco service provider and not an authorized dealer, we can’t make warranty claims on Gelco’s behalf, but we’ll document everything with photos and notes so you have a clear record for your own claim if one applies.
Some Gelco components are still in production and available through our supply channels in the Dallas area. For parts that have been discontinued, we match the dimensions and material specifications with high-quality equivalents from brands like DuraFlex, Famco, and Olympia Chimney. You’ll always know whether we’re installing an OEM Gelco part or a quality aftermarket equivalent before the work begins. If you want a specific answer about a specific part, call (361) 492-4099 and we’ll check availability. The estimate is free.
It depends on what the camera inspection shows, but the honest answer is that repair is the better call about 80% of the time. If the brick is mostly sound and the liner isn’t fully failed, repointing, crown work, and waterproofing will get you another decade or more. A full rebuild is only necessary when structural cracking is severe or the chimney has shifted off its footing. We’ll show you the photos and tell you straight which side of that line your Gelco chimney is on.
Inspection visits are typically scheduled within 3 to 5 business days, and most Gelco repairs we do in Dallas are completed the same day the work starts. Larger jobs like a liner resurfacing or a partial rebuild may require a second visit for materials and curing time, but you’ll always have a written schedule before we begin. Call (361) 492-4099 and we’ll get you on the calendar.
Water keeps getting in, and water is what turns a $600 repointing job into a $3,800 rebuild. Beyond the masonry damage, a cracked flue liner or a failed anchor plate can also cause exhaust to vent into the chimney chase or the living space instead of outdoors, and that carbon monoxide risk is not something to gamble on. If you’re seeing crumbling mortar, water stains on the ceiling near the chimney, or a musty smell from the firebox, get it inspected. The inspection is free, the quote is in writing, and you’ll know exactly what you’re dealing with.
For a free estimate on your Gelco chimney repair in Dallas, call (361) 492-4099. A live person answers, every time.
Written by Hank Delano, Owner, Flint Chimney Co Dallas at Flint Chimney Co Dallas, serving Dallas and nearby areas.