Gelco Crown Repair Nationwide

Gelco Crown Repair: The Kennesaw Owner’s Guide

Gelco crown repair in Kennesaw typically runs $340-$620 installed, depending on whether we’re sealing hairline cracks or rebuilding the full concrete wash. We stock Gelco-compatible crown sealants and reinforcement mesh on every truck, and most repairs are completed in a single visit. Most Kennesaw homeowners discover the problem during a routine sweep or when they spot water stains on the ceiling below the firebox after spring storms roll off Kennesaw Mountain.

Call (678) 535-2204

Which Gelco Models This Applies To

Gelco crowns are found on factory-built metal chimney systems, not masonry stacks, and they’re most common on the Gelco Model 1000 and 2000 series venting installed throughout Cobb County from the late 1990s through the mid-2010s. The crown on these units is a formed metal or composite cap that seals the chase top, not the poured concrete crown you’d see on a brick chimney. To identify yours, check the metal data plate on the chase cover or the original installation manual - the series number is stamped there. If the plate’s rusted off (common on west-facing chases in Kennesaw after five years of afternoon sun exposure), measure the chase opening: Model 1000 series takes a 13″ x 13″ crown assembly; Model 2000 series takes 13″ x 18″.

We source Gelco-spec crowns through our Haven buying network, and we also carry aftermarket equivalents from Olympia Chimney that match Gelco’s galvanized steel spec and drip-edge geometry. The aftermarket units fit the same chase rails and use identical fasteners, so you’re not locked into OEM pricing. One compatibility gotcha: early Model 1000 units shipped with a ¾” drip lip, while later production and all current aftermarket equivalents use a 1″ lip. The 1″ fits the older chase, but the reverse doesn’t work - water will run behind the chase siding.

Signs Your Gelco Crown Repair Is Failing

• Water stains on the ceiling near the chimney chase. The crown’s seal has breached, and runoff is tracking down the flue pipe or chase framing. In Kennesaw’s March-May storm season, this accelerates fast once the galvanized coating starts pinholing.
• Rust streaks down the chase siding. The crown’s drip edge isn’t shedding water past the siding anymore. We see this most on north-facing chases in neighborhoods like Legacy Park, where mildew holds moisture against the metal longer.
• Visible cracks or separation at the crown-to-flue joint. Gelco crowns use a high-temp silicone seal that cures rigid; thermal cycling between winter fires and summer attic heat fatigues it in 8-12 years.
• The firebox smells like wet ash even when dry. Water is entering the flue and mixing with residual creosote. This isn’t just unpleasant - it accelerates liner corrosion and can trigger musty odors that travel through the HVAC return.
• The crown is visibly sagging or the chase cover is dented inward. Structural failure, usually from someone walking on it or from ice loading during Kennesaw’s occasional January freeze events. The crown can’t be sealed until the underlying support is rebuilt.

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Replacement Cost & What’s Included

What drives the range: accessibility (steep roof pitch or two-story height adds setup time), whether the chase framing beneath is sound, and whether we’re matching an obsolete Gelco part number or fitting a current aftermarket equivalent. Every price is written before we start - Clause 1 of the Haven Standard, no exceptions. The work carries our 365-Day Done Right Promise, and you’ll receive camera stills of the finished crown and the chase interior.

DIY or Call Us?

Here’s what you can safely check yourself: from the ground with binoculars, look for cracks, rust streaks, or obvious sagging. From inside, shine a flashlight up the firebox - water marks on the flue walls mean water’s getting past the crown. That’s the limit of what we’d advise.

What goes wrong with DIY: Gelco crowns sit at chase-top height, often 15-25 feet up, on a structure not designed to bear your weight. The sealant requires a clean, dry, 50°F+ surface to cure - Kennesaw’s spring humidity and pop-up afternoon storms make timing tricky. And matching the drip-edge spec wrong (that ¾” vs. 1″ gotcha) means you’ll be doing it again in two years when the siding rots. We write it down before we ask you to decide anything. If you want a second opinion on another company’s quote, bring it - we’ll review it free.

Call (678) 535-2204 to schedule. Corrine Halstead and our crew cover Kennesaw and the surrounding area, including the older colonials near Kennesaw Mountain where we’ve learned to expect surprises in the flue almost every season.

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