Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Before
After
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AfterGelco Chimney Repair in Leesburg: What to Know First
We provide independent Gelco chimney repair in Leesburg, with most jobs completed in a single visit and upfront pricing agreed before we start. Typical Gelco repairs run from $340 for targeted mortar repointing up to $4,200 for partial chimney rebuilding, and we do not recommend work without camera evidence you can see for yourself. This page is for homeowners who already know they have Gelco components in their chimney system, or aren’t sure, and want a technician who can tell the difference between a Gelco UltraPro liner failure and a generic rust problem. Call (571) 701-7519 any time - a live person answers, even at midnight on Sunday.
How Gelco Products Fail - and How We Fix Them
- Gelco UltraPro stainless steel liners in Leesburg’s older colonials near Morven Park often show seam separation at the flex points after 15-20 years of heating cycles. The joints work harder here because temperature swings from near-freezing nights to 40-degree days stress the metal more than in steady-climate regions. We cut back to sound metal and splice in new Gelco-compatible sections rather than pushing a full liner replacement when only the lower run is compromised.
- Gelco ProFormance chimney caps with the built-in damper mechanism collect creosote in the hinge channel, especially on fireplaces burning unseasoned oak from Loudoun County lots. The damper hangs open a quarter inch, and that gap pulls conditioned air out of the house all winter. We disassemble the cap, machine-clean the channel, and replace the stainless pivot pin with a Gelco OEM part - aftermarket pins are slightly undersized and seize again within two seasons.
- Gelco All-Flame refractory panels in prefab fireplaces crack at the corner notches, not from impact but from thermal shock when homeowners let fires die overnight and relight them cold. The panels are discontinued, but we source NOS inventory through our Copperfield supply chain and can fabricate corner reinforcements from HeatShield refractory foam as a field solution when original panels are exhausted.
- Gelco chimney crowns poured with their proprietary slurry mix sometimes spall vertically rather than horizontally, which fools less experienced sweeps into thinking the damage is superficial. Vertical cracking means water has reached the rebar or wire mesh and expansion is pushing from within. We grind to sound concrete, treat the steel, and recast with a modified Gelco-compatible mix that adds microfiber for the freeze-thaw cycles Leesburg sees every February.
- Gelco flashing kits with the step-flash and counterflash combination separate at the silicone bead where the vertical leg meets the masonry. The silicone Gelco specified in the 1998-2006 production run hardens in direct UV, and Leesburg’s south-facing exposures get more sun hours than the northern slopes around Lovettsville. We remove the old bead, prime the metal, and bed the joint in polyurethane sealant rated for 50-year elastomeric recovery - not another bead of hardware-store silicone.
Our Gelco Chimney Repair Process
- 1
Call intake. A live person answers, asks what you’re burning and how often, and schedules a Level-2 camera inspection. Russell Haines has a standing offer: tell me what you are burning and how often, and I can tell you what your chimney looks like before I even climb up.
- 2
On-site diagnostics. Our technician runs a camera the full flue length, photographs every Gelco component, and identifies the series and production era from stamp marks and weld patterns.
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Parts decision. We source Gelco OEM when the part is available and the warranty position is clear. When Gelco has discontinued a line, we specify professional-grade aftermarket from DuraFlex, HeatShield, or Olympia Chimney, and we tell you which we’re using and why before we order.
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Repair execution. Background-checked, uniformed technicians complete most Gelco repairs in a single visit. Mortar repointing, cap rebuilds, and flashing replacement rarely need a return trip.
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Post-repair verification. We camera the repair, run a draft test, and show you the before-and-after images on the spot.
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Documentation and guarantee. You get photos, a plain-English verdict, and the 90-Day Done Right Promise in writing - if it’s not right, we make it right, no paperwork and no arguing.
What Gelco Chimney Repair Costs in Leesburg
| Repair Type | Typical Range in Leesburg | What Moves the Price |
|---|---|---|
| Targeted mortar repointing (Gelco crown or firebox) | $340 - $780 | Height of work, scaffolding needed, degree of grind-out |
| Gelco cap rebuild or damper mechanism repair | $420 - $950 | OEM vs. available NOS parts, stainless vs. galvanized hardware |
| Flashing repair or replacement (Gelco kit integration) | $580 - $1,400 | Roof pitch, number of chimney penetrations, siding type |
| Partial chimney rebuild with Gelco liner salvage | $2,800 - $4,200 | Courses to be rebuilt, footing condition, liner extraction complexity |
These are real numbers for the Leesburg market, not teaser rates. We agree on the price before we book the work, and the number on the estimate is the number on the invoice. Call (571) 701-7519 for an exact quote - estimates are free.
Why Leesburg Homeowners Call Hearthstone Chimney Co. for Gelco Work
We’ve been answering the phone with a live person for over 42 years, and we plan to be in Leesburg in thirty more. That changes how you treat a customer. The 90-Day Done Right Promise is backed in writing with no arguing - Krafted right, Every time, Your home first, Standing behind it. Our technicians know Gelco weld patterns, production date codes, and which parts Gelco discontinued and when. When a Gelco component is obsolete, we pivot to DuraFlex, HeatShield, or Olympia Chimney without treating your chimney like a learning opportunity. Photos you can see, a plain-English verdict, and a square deal with no surprises on the bill.
FAQs
No, if the original warranty period has expired, which it has on nearly all residential Gelco installations in Leesburg. Gelco’s limited lifetime warranty on stainless liners transferred to subsequent owners only with documented registration, and most registrations lapsed years ago. As an independent Gelco service provider, we document our repairs so any remaining warranty position is preserved, and we use OEM parts when that matters for coverage. Call (571) 701-7519 if you have your original paperwork - we can tell you in five minutes whether warranty is still in play.
Yes, for most lines, though availability varies by production year. Gelco UltraPro liners and current-generation caps are actively distributed. Discontinued lines like the All-Flame refractory panels require us to source through secondary channels - we maintain relationships with Copperfield and other professional suppliers for exactly this situation. We never promise a part until we’ve confirmed stock, and we always present alternatives if OEM is unavailable.
The camera inspection tells the story. We have rebuilt chimneys where the Gelco liner was sound enough to salvage, and we have recommended full replacement when the liner was compromised but the masonry was fine. No recommendation without photo evidence you can see yourself. Some conditions can safely wait a season; others, like a separated liner seam above the smoke chamber, need attention before the next fire. We’ll tell you which yours is.
Most Gelco repairs are completed in a single visit once scheduled. Parts availability for older or discontinued lines can add a few days to the timeline. We do not promise same-day dispatch - we promise we’ll be there when we say, with the right parts and the right technician. Seasonal demand peaks before burning season, so scheduling earlier is practical, but we do not pressure-book.
Spalled mortar lets water into the wythe, and freeze-thaw cycles in a typical Leesburg winter will open cracks wider. A separated liner seam can leak combustion gases, including carbon monoxide, into wall cavities. These are real risks, not scare tactics, and they worsen on a timeline measured in seasons, not days. The inspection costs nothing, and we’ll tell you plainly whether your condition is urgent, watchable, or somewhere between. Call (571) 701-7519 for an exact quote - estimates are free.
Written by Russell Haines, Owner, Hearthstone Chimney Co. at Hearthstone Chimney Co., serving Leesburg and nearby areas.