Fast, Reliable Chimney Cap & Crown Across Franklin Square
Chimney cap and crown repair in Franklin Square typically runs $340-$1,200 depending on whether you need a coating, a partial rebuild, or full crown replacement with a new cap. Most Franklin Square jobs are completed in a single visit, and our technicians carry the parts to do it that day. Call (855) 950-3861 - a live person answers, 24 hours a day.
We’ve been driving to Franklin Square since 1984, back when the Hempstead Turnpike corridor was still dotted with working farms. We know the post-war Cape Cods along Dogwood Road and the ranches near Rath Park. These homes were built fast and built to last, but their chimneys weren’t designed for today’s heating systems. When a crown cracks on a 1950s chimney in Franklin Square, water gets in fast. And in Nassau County’s freeze-thaw climate, that water does real damage before spring.
Why Hearthstone Chimney Co. of New York City Is Franklin Square’s Preferred Chimney Cap & Crown Company
Franklin Square homeowners call us because we document what we find. Our Level-2 camera inspection ends with photos you can see and a plain-English verdict - no jargon, no scare tactics. We’ve earned a strong local reputation in Nassau County over 42 years, and our Chimney Cap & Crown in Franklin Square customers specifically mention that we show up when we say we will.
Our response time to Franklin Square is typically same-day or next-day. We’re familiar with the local permit requirements through the Town of Hempstead Building Department, and we know which streets have the tight lot lines that make ladder access tricky. Background-checked, uniformed technicians arrive with no-hassle upfront pricing - the number on the estimate is the number on the invoice.
Frank Calucci built this company on the K.E.Y.S. code: Krafted right, Every time, Your home first, Standing behind it. That means our 90-Day Done Right Promise is in writing, with no arguing. If it’s not right, we come back. Period.
Our Chimney Cap & Crown Services in Franklin Square
Crown Repair
Crown repair in Franklin Square usually means addressing concrete that’s cracked from decades of Nassau County freeze-thaw cycles. The original crowns on 1950s chimneys were often poured with weak mortar mixes that weren’t meant to last 70 years. We remove the damaged section, form a new concrete crown with proper slope and overhang, and seal it so water runs off toward your yard - not your neighbor’s foundation. Franklin Square’s tight lots mean chimney crowns often share property lines, so water runoff from a failing crown can damage a neighbor’s foundation, sparking disputes that make crown repair a priority.
Crown Coating
For Franklin Square chimneys where the crown is structurally sound but weathered, crown coating is the right call. We apply a flexible, waterproof membrane - HeatShield or similar professional-grade material - that bridges hairline cracks and stops water penetration. At $340-$580, it’s roughly half the cost of full crown replacement. We recommend it for chimneys on streets like Dogwood Road or near Rath Park where the crown shows surface wear but hasn’t yet spalled through to the brick below. Done right, a coating adds 10-15 years of service life.
Multi-Flue Cap Installation
Franklin Square’s modest ranches and Cape Cods often have single-flue chimneys that served both furnace and water heater. A standard single-flue cap leaves the second opening exposed. Our multi-flue caps cover the entire chimney top, stopping rain and debris from entering either flue. On a recent job on Hempstead Turnpike in Franklin Square, we found a 1950s Cape Cod with a crumbling concrete crown and a heat-damaged DuraFlex liner from an oil-to-gas conversion. We replaced the crown with a sloped, coated design and installed a new multi-flue cap to stop water entry and carbon monoxide backdrafting. Multi-flue caps run $480-$890 installed in Franklin Square.
Cap Replacement
Standard cap replacement in Franklin Square costs $280-$520. We see a lot of rusted galvanized caps from the 1980s and 90s that have finally given out. We install stainless steel or copper caps from Famco and Copperfield - no builder-grade substitutes. If your flue liner was damaged by an oil-to-gas conversion, we’ll spot that during the cap removal and give you a straight assessment.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Franklin Square
We stock parts from DuraFlex, HeatShield, Famco, and Copperfield - brands that hold up in Nassau County’s climate. Our Franklin Square warehouse carries common multi-flue cap sizes for post-war chimneys, so we’re not ordering parts and making you wait. When we inspect your chimney, we measure on-site and can often install the same day. No substitutions without your approval. No surprises on the bill.
Common Chimney Cap & Crown Problems We See in Franklin Square Homes
- Freeze-thaw spalling on patched crowns. Chimneys that received 1980s crown patching are now seeing those repairs fail. The original patch material wasn’t designed to bond with 70-year-old concrete through decades of Nassau County freeze-thaw cycles. We remove the patch and rebuild properly.
- Acidic condensation from oversized flues. Franklin Square’s oil-to-gas conversions left chimneys with flues too large for modern gas appliances. The resulting condensation is acidic, eating clay tile liners and degrading crown mortar from the inside out. Every cap and crown job here should include a liner assessment.
- Single-flue chimneys with dual appliance duty. Many Franklin Square ranches have one flue handling both furnace and water heater. A cap sized for single use leaves the second opening exposed to rain, which accelerates liner failure and stains interior walls.
- Second-generation liner problems on “already fixed” homes. Technicians working Franklin Square regularly find chimneys that were relined or patched in the 1980s-90s when oil-to-gas conversions first spiked. Those patch jobs are now themselves failing. Owners are surprised - they assumed the chimney was taken care of.
Pricing for Chimney Cap & Crown in Franklin Square, NY
Here’s what Franklin Square homeowners actually pay:
- Crown coating: $340-$580
- Standard cap replacement: $280-$520
- Multi-flue cap installation: $480-$890
- Partial crown repair: $620-$940
- Full crown replacement: $890-$1,200
Factors that move the price: accessibility on tight lots, extent of brick damage beneath the crown, whether the flue liner needs attention, and if we’re matching a neighbor’s aesthetic on a shared property line. We give you the full number before we start. Estimates are free. Call (855) 950-3861.
We Also Serve Cities Near Franklin Square
Our Chimney Cap & Crown team covers Lakeview, West Hempstead, Elmont, and Malverne with the same same-day or next-day response. We know the chimney stock in these neighborhoods - similar post-war builds, similar oil-to-gas conversion histories, similar freeze-thaw damage patterns. One call gets you a technician who understands Long Island chimneys.
Serving Franklin Square, NY - Our Local Coverage Area
We’re based in the Franklin Square area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Chimney Cap & Crown in Franklin Square
Yes - the combination of an oversized flue and acidic gas condensation will destroy your crown mortar and clay liner within a few heating seasons. We assess liner condition during every crown and cap inspection in Franklin Square. If you’re planning a conversion, call us first at (855) 950-3861 for a free evaluation - it’s cheaper to do the cap, crown, and liner right than to fix water damage later.
Crown coating is a waterproof membrane applied to a structurally sound crown with surface cracks - $340-$580, good for 10-15 years. Crown repair removes and rebuilds damaged concrete - $620-$940 for partial, up to $1,200 for full replacement. We recommend coating for crowns with minor weathering; repair when there’s spalling, exposed rebar, or water intrusion to the brick below. We’ll show you photos and give you a straight recommendation.
Multi-flue caps cover the entire chimney top, not just one flue opening. Franklin Square ranches often have single-flue chimneys serving both furnace and water heater, leaving a second opening unprotected. A multi-flue cap stops rain and debris from entering either flue, prevents animal nesting, and reduces down-drafting. At $480-$890 installed, it’s the right solution for these dual-duty chimneys.
Replacement is necessary when the crown has through-cracks, missing chunks, or spalling that exposes the brick beneath. Repair works for surface cracking with solid underlying structure. Our Level-2 inspection with camera gives you photos you can see and a plain-English verdict. In Franklin Square’s climate, we err toward replacement when the crown is original to a 1950s home - 70 years is past reasonable service life for that concrete mix. Call (855) 950-3861 for a free assessment.
Almost certainly. The 1980s-90s patch jobs we find in Franklin Square used materials that don’t bond well with original crown concrete, and they’ve now endured 30+ years of freeze-thaw stress. We regularly remove these failing patches and rebuild properly. If your chimney was “fixed” during the first oil-to-gas conversion wave, it’s worth a fresh look - especially if you’re seeing interior water stains or draft problems. Estimates are free: (855) 950-3861.
Ready to protect your Franklin Square chimney? Call (855) 950-3861 - a live person answers 24/7. We’ll schedule your free estimate, show up when we say, and stand behind our work with the 90-Day Done Right Promise in writing. No arguing. No surprises. Done right.
Written by Frank Calucci, Owner at Hearthstone Chimney Co., serving Franklin Square since 1984.