Gelco Chimney Cap & Crown Nationwide

Gelco Chimney Cap & Crown in Allentown: What to Know First

As an independent Gelco service provider, we install, replace, and repair Gelco chimney caps and crowns across Allentown, with most jobs completed in a single visit and upfront pricing agreed before we start. A standard Gelco cap replacement runs $280-$520, while crown repair or coating typically falls between $340-$780 depending on accessibility and masonry condition. We do not sell you a part you do not need, and we do not book a repair without showing you photos of what we found.

Call (610) 632-1394

This page is for Gelco owners in Allentown, from the older brick colonials near West Park to the split-levels off Cedar Crest Boulevard, who want a cap that fits correctly or a crown that sheds water the way it was designed to. If you are unsure which Gelco series you have, we figure that out during inspection. Call (610) 632-1394 - a live person answers, even at 10 p.m. on a Sunday.

How Gelco Products Fail - and How We Fix Them

• Gelco Multi-Flue caps with the welded-seam lid. The lid seam on older Gelco Multi-Flue units, common on Allentown twins and rowhomes with multiple flues, separates after 8-12 years of freeze-thaw cycling. Water wicks into the seam, rusts the interior frame from the inside out, and the cap starts to rattle or lift in wind. We pull the cap, assess the flue wall condition, and fit either a new Gelco OEM lid or a heavier-gauge aftermarket equivalent if the flue spacing allows.
• Gelco Single-Flue caps with the mesh screen base. The 3/4-inch mesh on Gelco Single-Flue caps clogs with cottonwood seed in late spring and maple samaras in early summer, especially in Allentown’s tree-heavy neighborhoods like the West End. Homeowners smell smoke backup on the first cold day because the cap suffocated over summer. We clean or replace the screen, and if the cap is galvanized rather than stainless, we flag the rust timeline before it becomes a flue obstruction.
• Gelco Crown Seal coating on poured concrete crowns. Gelco’s Crown Seal is a brushable elastomeric, but it fails prematurely when applied over active cracks or spalling concrete without proper prep. We see this on Allentown homes from the 1960s and 70s with soft aggregate crowns that were coated instead of repaired. We grind back to sound concrete, repair with proper crown mix, then coat - or we skip the coating entirely if the crown geometry is wrong and rebuild instead.
• Gelco chimney caps on oil-vented flues. Gelco caps installed on oil furnace flues in Allentown’s older housing stock collect sulfur-laden condensation on the underside. The stainless holds up, but the attachment points and slip-in collar corrode where the cap meets the flue tile. We upgrade to a Gelco cap with a 316-grade collar or fabricate a custom adapter if the flue tile is oversized or irregular from decades of oil service.
• Gelco caps with the factory screw-tension band. The tension-band mounting on Gelco’s standard single-flue caps loosens as flue tile expands and contracts through Allentown’s 90-degree summer-to-winter temperature swings. The cap tilts, gaps open, and squirrels or starlings nest before the homeowner notices. We reseat with a proper Gelco replacement band or switch to a flue-top mount with masonry anchors if the tile lip is too degraded for friction mounting.

Our Gelco Chimney Cap & Crown Process

1. 1
   Call and schedule. A live person answers, 24 hours a day. We book a window that works for you, not a four-hour guessing game.
2. 2
   Level-2 camera inspection. Our technician arrives uniformed and background-checked. We run a camera up the flue, photograph the flue top, crown condition, and cap fit, then show you the images on a tablet with a plain-English verdict.
3. 3
   Parts decision. If your Gelco cap is repairable, we say so. If it needs replacement, we source Gelco OEM or a compatible professional-grade equivalent from our inventory, depending on lead time and your flue configuration. We also carry DuraFlex and HeatShield materials if the project expands to liner or masonry work.
4. 4
   The repair or install. Most Gelco cap and crown jobs finish in one visit. Crown repairs get proper cure time if we pour new concrete; coatings get a weather-check window we explain before we start.
5. 5
   Post-job test and documentation. We run a final visual, verify cap stability and mesh clearance, and email you photos with notes. The 90-Day Done Right Promise applies in writing before we leave.
6. 6
   Cleanup and close. We haul old material, sweep the roof and ground area, and review the invoice line by line. The number we quoted is the number you pay.

What Gelco Chimney Cap & Crown Costs in Allentown

These are real Allentown numbers, not national averages padded for your zip code. A steep roof on a West Park Victorian costs more in labor than a ranch walk-out near Trexler Park. We give you the exact price after inspection, not after we start cutting. Estimates are free. Call (610) 632-1394.

Why Allentown Homeowners Call Hearthstone Chimney Co. for Gelco Work

We have been working chimneys in Allentown for over 42 years. The chimney doesn’t care what it looks like from the street. We check what’s inside.

Our 90-Day Done Right Promise means if the cap leaks or the coating cracks, we come back. No paperwork to find, no argument to win. Our technicians are background-checked, uniformed, and trained on Gelco’s product line specifically, not just generic cap installation. When a Gelco part is backordered, we have professional-grade alternatives from DuraFlex, HeatShield, and other brands we trust, and we explain the trade-off before you decide. A live person answers the phone at every hour. Most jobs finish in one visit. And the estimate we give is the invoice you get.

FAQs