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.
Gelco Chimney Repair in Sherman Oaks: What to Know First
We provide independent Gelco chimney repair in Sherman Oaks with a written price before any work starts and a camera-scan photo record of every flue. Most Gelco repairs run $340-$1,800 depending on whether we’re repointing mortar joints, rebuilding a spalling crown, or replacing compromised flashing, and we typically schedule within a week during peak season. This page is for Gelco owners in Sherman Oaks who want to know what’s actually wrong, what it’ll cost, and whether the repair can wait until next season. Call (424) 414-6048 for a free estimate with no dispatch fee.
How Gelco Products Fail - and How We Fix Them
- Gelco Multi-Flue Caps (Model M-8 and M-12 series): The 304 stainless mesh on these caps fatigues faster than the 316-grade shell in Sherman Oaks’ Santa Ana wind cycles, especially on homes south of Ventura Boulevard where gusts funnel through the pass. We see the mesh tear at the tack welds first, then debris nests in the flue. We replace with matching Gelco spec or upgrade to 316 mesh if the homeowner burns regularly, and we photograph the flue interior before the cap goes back on.
- Gelco Single-Flue Caps with Overhang (S-series): The drip edge on S-series caps can back-pitch when the original installer uses standard masonry screws instead of Gelco’s longer Tapcons into the crown. Water runs behind the cap, freezes in our rare but sharp January cold snaps, and spalls the crown face below. We remove the cap, assess crown integrity with a hammer test, repoint or rebuild the crown as needed, and reinstall with proper embedment depth - usually 1.5 inches into sound concrete.
- Gelco Lyemance and Lock-Top dampers: The silicone rubber gasket on these top-sealing dampers hardens after 8-12 years in Southern California UV, especially on south-facing chimneys in the hills above Mulholland. The damper still opens but won’t seal fully, so conditioned air escapes and minor down-drafts carry fireplace odor into the room. We stock the Gelco rebuild kit with new gasket, pivot pins, and chain assembly, or we can retrofit a HeatShield cast-in-place smoke chamber seal if the firebox configuration allows.
- Gelco chimney pots and decorative shrouds: The terra cotta-style gelcoat finish on Gelco’s decorative line chalks and crazes after prolonged sun exposure, which is nearly every installation in Sherman Oaks. It’s cosmetic until the gelcoat cracks through to the fiberglass substrate, at which point water wicks in and delaminates the pot from the inside. We repair minor crazing with a UV-stable marine epoxy, or we source a replacement through our Haven buying network and match the existing roofline profile.
- Gelco chase covers on prefab fireplaces: The factory break on Gelco chase covers sits at the wrong pitch for some local roof geometries, particularly the shallow-slope additions common in 1960s Sherman Oaks ranch remodels. Water pools at the low corner, rusts the pan from underneath, and stains the siding below. We fabricate a replacement chase cover with a custom cricket or raised diverter, measured on-site, or we transition to a DuraFlex chase cover if the flue collar configuration allows.
Our Gelco Chimney Repair Process

- 1
Call and scheduling: A live person answers, checks our Sherman Oaks route, and books a window. We text the assigned tech’s name and photo the morning of.
- 2
NFPA 211 Level 2 inspection: Camera down the flue, documented photo record, hammer test on mortar, moisture meter on accessible framing. Clause 4 of the Haven Standard requires this record on every job - we’ve done it since 2009.
- 3
Written price and scope: Corrine Halstead or the on-site tech delivers a written price, written scope, and written warranty before any tool comes off the truck. The camera doesn’t lie, and neither does the written quote.
- 4
Parts decision: OEM Gelco when the warranty or fit demands it; quality aftermarket from our Haven network when it doesn’t. We explain the trade-off in writing.
- 5
Repair and test: The work, a smoke or water test as appropriate, and a second camera run to document the finished condition.
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Documentation and follow-up: Photo record uploaded, 365-Day Done Right Promise stamped, and a check-in call at 30 days.
Before
AfterWhat Gelco Chimney Repair Costs in Sherman Oaks
| Repair Type | Typical Range | What Moves the Price |
|---|---|---|
| Mortar repointing (tuckpointing), up to 20 sq ft | $340-$620 | Scaffold need, joint depth, accessibility |
| Crown repair or rebuild, Gelco cap reinstall | $580-$1,100 | Full rebuild vs. pour-over; stainless vs. copper flashing |
| Flashing repair or replacement | $420-$780 | Roof pitch, shingle type, step vs. counter flashing |
| Chimney pot or shroud replacement | $680-$1,400 | Custom fabrication, crane access for tall stacks |
| Partial chimney rebuild (spalling brick, compromised structure) | $1,200-$1,800+ | Height, brick match, permit requirements |
These are Sherman Oaks market ranges based on our 38,000+ jobs since 2009. We don’t quote over the phone without seeing the chimney - but we don’t charge to look, either. Call (424) 414-6048 for a free estimate with exact pricing before any work begins.
Why Sherman Oaks Homeowners Call Emberly Chimney Cleaners Sherman Oaks for Gelco Work

We’re an independent Gelco service provider - not affiliated with the manufacturer - which means we source parts from Gelco, DuraFlex, HeatShield, Olympia Chimney, Famco, and Copperfield through our Haven buying network specifically to keep customer prices honest. Corrine Halstead and her crew have been working chimneys across Sherman Oaks for years, including the older wood-framed homes along Ventura Boulevard where the fireboxes get heavy use during the cooler months. Every job carries the 365-Day Done Right Promise, a written warranty, and Clause 4’s documented photo record. If another company has already given you a written estimate, we’ll provide a free second opinion with our camera findings.
FAQs
No - Gelco’s warranty covers manufacturing defects, not installation or repair work performed by independent technicians. We use OEM Gelco parts when the original warranty claim is active or when fit tolerances require it, and we document part serial numbers for your records. Call (424) 414-6048 if you need help determining whether your component is still under Gelco’s defect coverage.
If the Lyemance or Lock-Top damper opens and closes but won’t seal completely, the silicone gasket has likely hardened - a rebuild kit fixes this for roughly half the cost of full replacement. If the frame is warped or the pivot pins are seized, replacement is the only sound option. We camera-scan the flue to confirm which condition exists before quoting either path. Call (424) 414-6048 for a free inspection.
We stock common Gelco gaskets, mesh, and hardware at our local depot, and our Haven network routes specialty items within 3-5 business days. For chase covers or custom chimney pots, we often fabricate faster than OEM lead times. We’ll tell you exactly which path applies before you book.
Spalling limited to the top 2-3 courses and sound mortar below typically qualifies for repointing and partial rebuild. If the spalling extends below the roofline or the wythes have separated, a full rebuild is the only code-compliant option. We determine this with a hammer test and camera assessment, show you the footage, and quote both scenarios when they’re close calls. Call (424) 414-6048 for an exact scope and price.
NFPA 211 recommends annual inspection for all chimney systems, and the Santa Ana winds plus occasional heavy rain cycles in Sherman Oaks make this a practical minimum rather than a conservative one. If you burn more than 30 fires per season, or if your Gelco cap or damper is past 10 years, we’d rather find a $300 gasket issue than a $1,500 crown rebuild. Estimates are free - call (424) 414-6048 to schedule.
Written by Corrine Halstead, Owner, Emberly Chimney Cleaners Sherman Oaks at Emberly Chimney Cleaners Sherman Oaks, serving Sherman Oaks and nearby areas.





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