Gelco Chimney Cap Installation Nationwide

Gelco Chimney Cap Installation: The Queens Owner’s Guide

A Gelco chimney cap installed by Hearthstone Chimney Co. in Queens typically runs $380-$720 depending on flue size and whether your crown needs repair before mounting. We stock Gelco caps in 8″, 9″, 10″, and 13″ round and standard rectangular sizes on our trucks, and most Queens replacements are completed in a single visit. Most homeowners discover their cap has failed after finding rust flakes in the firebox, water stains on the ceiling near the chimney breast, or a family of squirrels that moved in through a bent or missing screen.

Call (516) 531-6315

Which Gelco Models This Applies To

Gelco caps break down into three main series you’ll see on Queens homes: the original Gelco Stainless (pre-2010, often marked with an embossed “G” on the skirt), the Gelco Ultra (heavier 24-gauge 304 stainless with the cross-break top design), and the Gelco Multi-Flue models common on side-by-side flues in Bayside and Forest Hills two-families. The critical measurement is the outside diameter of your flue tile, not the chimney crown, and we see a lot of homeowners order the wrong size because they measured the crown instead. Gelco’s 8″ cap fits a 7.5″-8.25″ flue; 9″ fits 8.5″-9.25″; 10″ fits 9.5″-10.25″. The Multi-Flue units require center-to-center spacing between flues, and in Queens that spacing was rarely standardized before 1965.

We are an independent service provider, not affiliated with Gelco. For caps still under a decade old, we can often source OEM Gelco hardware. On older units where Gelco has discontinued the exact model, we match with equivalent-grade stainless from our inventory, and we’ll tell you before we order which route we’re taking. Russell Haines checks every spec against the actual flue before anything gets unboxed.

Signs Your Gelco Chimney Cap Is Failing

• Rust staining down the chimney breast or on the roof below the cap. Gelco’s stainless holds up well, but the spot-welded seams on pre-2012 units collect salt and exhaust condensation, especially in Queens where nor’easters drive moisture sideways. Once the seam opens, water tracks behind the cap and runs down the flue.
• Mesh screen pulled away from the frame or gaping at the corners. Squirrels and raccoons in Queens neighborhoods like Flushing and Jamaica Estates test every weak point. Gelco’s mesh is 5/8″ stainless, but the crimped attachment to the skirt can fatigue after 15-18 winters of freeze-thaw.
• Cap sitting crooked or visibly lifted from the flue. High winds off the Long Island Sound, common in Whitestone and Breezy Point, can deform the mounting skirt or loosen the tension screws. A tilted cap funnels water into the flue instead of shedding it.
• Draft problems or smoke backing up into the room. The Gelco Ultra’s internal baffle can clog with creosote if the screen mesh has collapsed inward, restricting airflow. We see this most in homes that burn unseasoned wood through Queens winters.
• Missing cap entirely after a storm. If your crown was never properly pitched or the cap was secured with generic screws instead of Gelco’s expansion bolts, a March wind event can send it into the neighbor’s yard. We document the crown condition before remounting so it does not happen twice.

Replacement Cost & What’s Included

What drives the range: flue accessibility (steep roofs in Douglaston add time), whether the existing cap left corrosion that needs cleaning before the new one seats, and if the crown has settled or cracked. Our estimate includes the cap, stainless hardware, sealant, and disposal of the old unit. No surprises on the bill. Every Gelco installation carries our 90-Day Done Right Promise in writing, no arguing. If it’s wrong, we’ll say so. If we fix it, it stays fixed.

DIY or Call Us?

There is a safe middle ground here. A homeowner can check the flue diameter with a tape measure, photograph the existing cap from the ground with binoculars, and confirm whether the screen is intact. Do not climb the roof. Queens roofs are steep, often slate or tile, and the fall risk outweighs any savings. The actual installation requires proper fall protection, knowledge of crown sealants (silicone fails in our freeze-thaw cycles; we use polyurethane), and the right tension on mounting bolts, overtightening cracks the flue tile. We complete most Gelco replacements in under 90 minutes, and you’ll have the inspection photos and a written warranty. Call (516) 531-6315 for a free estimate.

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