Gelco Chimney Cap Installation Nationwide

Gelco Chimney Cap Installation: The Plano Owner’s Guide

A Gelco chimney cap installed in Plano typically runs $340-$680 depending on flue size, cap style, and whether the flue needs crown repair before mounting. We stock Gelco single-flue and multi-flue caps for common Plano flue dimensions, and most installations finish in under two hours. Corrine Halstead and our crew have fitted Gelco caps on everything from 1980s ranch flues in Old Towne Plano to new construction near Legacy West.

Call (469) 240-3101

Most Plano homeowners discover their chimney cap has failed during a routine sweep or after spotting rust streaks on the brickwork during spring storms. The cap sits exposed to North Texas hail, 100-degree summer metal expansion, and the occasional freeze-thaw cycle that loosens fasteners. When it goes, water enters the flue, the damper rusts, and the repair bill multiplies fast.

Which Gelco Models This Applies To

Gelco caps fall into two main lines we handle regularly: the single-flue series (models 100-400 range) and the multi-flue/crown-mount series (500-800 range). The single-flue caps clamp or bolt directly to the tile flue liner; the multi-flue versions mount to the concrete crown and cover multiple flues or a large chimney top. To identify yours, check the stamped model number on the underside of the mesh screen or the cross-bar frame, usually visible from the roof edge with binoculars.

Here’s where Plano owners get tripped up: Gelco single-flue caps are sized by flue outside dimension, not the flue tile’s inner opening. A 13×13 inch flue tile often measures 15×15 on the outside, and ordering by the wrong number means a cap that won’t seat or seal. We measure on-site with a sliding caliper before ordering.

We source Gelco caps through Haven’s buying network alongside DuraFlex and HeatShield materials. For most Plano homes, the OEM Gelco cap is the right choice; the mesh gauge and stainless grade match the original spec. Aftermarket equivalents exist, but we’ve seen lower-grade 430 stainless surface-rust within three North Texas summers where Gelco’s 304 or 316-grade caps hold steady. We keep the common Plano sizes on the truck: 8×8, 8×13, 13×13, and 13×18 single-flue; plus adjustable multi-flue frames for chimneys between 30 and 48 inches wide.

Signs Your Gelco Chimney Cap Is Failing

• Rust streaks down the chimney face. Gelco caps use stainless mesh and a powder-coated or stainless top, but the cross-bar frame and bolt hardware are failure points. Once water breaches the frame, it tracks down the flue tile and stains brick below. We see this most on north-facing chimneys in Plano’s older neighborhoods where the cap never fully dries.
• Mesh screen pulling away from the frame or sagging. The spot-welds between mesh and frame fatigue after a decade of thermal cycling. A gap larger than a quarter inch lets squirrels and roof rats enter; we’ve pulled nests from flues in Plano’s creek-adjacent lots where this gap went unnoticed.
• Cap tilted or shifted after wind or hail. Gelco single-flue caps use set-screws or a clamp band. If the flue tile top is chipped or the clamp loosened, a March hailstorm or straight-line wind can knock the cap askew. A tilted cap channels water into the flue instead of away.
• Water in the firebox or rust on the damper. This means the cap has already failed completely or the crown beneath it is cracked. The cap is your first defense; the crown is your second. Both need inspection before replacing one without the other.
• Visible creosote buildup on the cap mesh itself. Heavy glazing means restricted airflow through the screen, which means incomplete combustion gases are backing up. The cap isn’t broken, but it’s clogged and functioning like a blocked flue. This is a fire hazard and a carbon monoxide risk.

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After

Replacement Cost & What’s Included

What drives the range: flue dimensions above 13×18 require custom-order caps with longer lead times; crown-mount caps need more labor and flashing work; and some Plano homes built 1985-2005 have flue tiles that were never properly capped, so we find spalling or freeze-thaw damage once the old cap comes off. We photograph everything before quoting. Clause 1 of the Haven Standard requires a written price, written scope, and written warranty before any work starts. The 365-Day Done Right Promise covers the installation and hardware.

DIY or Call Us?

What you can safely check from the ground: confirm the cap is still seated square, look for obvious rust streaks, and note any animal activity. Use binoculars. Do not climb the roof.

Where DIY goes wrong: Gelco caps require proper torque on set-screws or clamp bands, over-tightening cracks flue tile, and under-tightening loses the cap in the next storm. Crown-mount caps need a bead of high-temp sealant and proper counter-flashing that most homeowners don’t stock. More critically, a failed cap often reveals a failed crown or damaged flue liner that a ground inspection misses. We’ve revisited Plano homes where a homeowner installed a new cap over a cracked crown, and the water intrusion continued silently for two more years.

The camera doesn’t guess. Neither do we. Call (469) 240-3101 and we’ll scope it, price it in writing, and install when you’re ready.

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