Gelco Crown Repair Nationwide

Gelco Crown Repair: The Plano Owner’s Guide

Gelco crown repair in Plano typically runs $340-$780 installed, depending on whether we’re sealing minor cracks or rebuilding the full concrete crown on a Gelco-equipped system. We stock Gelco-compatible crown sealants and custom-formed crown forms on every truck, and most repairs are completed in a single visit. Homeowners usually notice the problem after a hard North Texas rain, when water starts staining the ceiling near the fireplace or they spot crumbling concrete on the chimney top from the driveway.

Call (469) 240-3101

Which Gelco Models This Applies To

Gelco manufactured chimney caps, dampers, and accessory components from the 1980s through the mid-2010s, and their crown-mounted damper assemblies are still common across Plano’s 1990s and 2000s housing stock. The critical identifier is the damper frame stamped into the concrete crown itself, not a throat damper down inside the firebox. Look for a rectangular cast-aluminum frame set flush with the crown surface, usually with a Gelco logo cast into the handle mechanism or a small tag riveted to the frame edge.

Model lines include the Gelco Top-Sealing Damper (TSD) series in 13″ x 13″ through 17″ x 17″ flue openings, and the older Gelco Lyemance-compatible units with the rectangular chain-pull housing. The compatibility gotcha: Gelco used two different frame depths depending on whether the original crown was poured 4-inch or 6-inch thick. A shallow-frame damper forced into a deep crown cracks the concrete inside two seasons. We measure frame depth with a simple gauge before quoting, because guessing wrong means a second trip and a second pour.

OEM Gelco crowns and dampers are no longer manufactured, but we source exact-fit aftermarket equivalents through our Haven buying network from Gelco’s original casting supplier, plus HeatShield crown resurfacing systems when the underlying concrete is sound. The aftermarket frames carry the same 10-year warranty as the original equipment ever did. We don’t push full rebuilds when a quality resurfacing will last another decade in Plano’s climate.

Signs Your Gelco Crown Repair Is Failing

• Water stains on the ceiling near the chimney breast. A cracked Gelco crown lets rainwater run straight down the flue tile joints. In Plano’s spring storm season, a single quarter-inch crack can funnel gallons into the attic space over a weekend. The stain pattern usually follows the chimney chase framing, not the roofline.
• Spalling or flaking concrete visible from the ground. The crown’s top surface is deteriorating because freeze-thaw cycles have pushed water through the Gelco frame seal. North Texas doesn’t freeze often, but when we drop into the 20s after a rain, the trapped moisture expands and pops off concrete chips. Once spalling starts, the crown loses its slope and water pools instead of shedding.
• Damper handle stuck or grinding. The Gelco mechanism depends on a clean frame track. When crown cracks let water into the track, rust forms on the stainless cable and aluminum frame. The handle gets harder to turn each season until it seizes entirely. A stuck damper in the closed position traps smoke; stuck open bleeds conditioned air year-round.
• Efflorescence (white powder) on the exterior brick below the crown. This is dissolved salts from the mortar being carried out by water that entered through crown cracks. It’s not cosmetic. In Plano’s alkaline clay soil environment, the same water movement accelerates mortar joint failure and can destabilize the chimney stack over time.
• Birds or squirrels nesting on top of the chimney. A Gelco crown with significant spalling loses its smooth, sloped profile and creates ledges where debris collects. Once there’s a flat spot, animals treat it like a building site. The crown repair then includes clearing the nest and installing proper mesh screening, which we fabricate on-site to match the flue count.

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Replacement Cost & What’s Included

What drives the range: crown thickness measurement, number of flues, accessibility (steep roof pitch or two-story stack), and whether the Gelco frame is salvageable. Every quote is written before work starts, with the scope itemized and the warranty stated. The 365-Day Done Right Promise applies to all three tiers. Materials come through our Haven buying network from Gelco’s original supply chain and HeatShield, which keeps the price honest without middleman markup.

DIY or Call Us?

Here’s what you can safely check yourself: from the ground with binoculars, look for visible cracks, spalling, or animal activity on the crown. Inside, work the Gelco damper handle through its full range. If it binds or grinds, the frame is compromised. That’s the limit of safe homeowner inspection.

What goes wrong with DIY crown repair: the sealants sold at hardware stores are formulated for horizontal concrete, not chimney crowns that see 300°F temperature swings and direct UV. They fail within 18 months in Texas sun. Worse, working on a chimney crown requires proper fall protection on a roof pitch, and the concrete pour demands a formed slope of at least 1/4 inch per foot to shed water. A flat or reverse-sloped DIY crown traps water and accelerates the damage it was meant to fix. The camera doesn’t guess. Neither do we. Call (469) 240-3101 and we’ll measure, quote in writing, and handle the roof work with our crew.

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