Fast, Reliable Chimney Liner & Rebuild Across Franklin Square
Chimney liner replacement in Franklin Square typically runs $2,800-$5,500 for stainless steel systems, while partial rebuilds start around $4,200 and full chimney rebuilds range from $8,500-$14,000 depending on height and access. Most Franklin Square jobs are completed in a single day, and our crew carries the common liner diameters and DuraFlex fittings needed for the Cape Cods and ranches that dominate this neighborhood. If you’re smelling rotten eggs near your furnace or seeing clay fragments in your firebox, call (855) 950-3861 - a live person answers, and we’ll get a technician to your Franklin Square home fast.
We’ve been working on Franklin Square chimneys since 1984, long enough to have relined some of these same flues twice. The post-war housing stock here - those solid little ranches off Hempstead Turnpike and the Cape Cods near Rath Park - was built with chimneys sized for oil burners, not the gas conversions that swept Nassau County in the ’80s and ’90s. That mismatch is still causing problems today, and it’s why our Chimney Liner & Rebuild team treats every Franklin Square call as a potential liner assessment, not just a sweep.
Why Hearthstone Chimney Co. of New York City Is Franklin Square’s Preferred Chimney Liner & Rebuild Company
Franklin Square homeowners know their chimneys. Many of you have lived in the same house for thirty, forty, fifty years. You’ve seen the oil truck come and go, watched the neighborhood convert to gas, maybe even remember the first relining contractor who knocked on your door in 1992. We don’t pretend that’s simple history - for us, it’s diagnostic context. When we inspect a chimney on Washington Street or near the Franklin Square-North Valley Stream border, we’re looking for the patch jobs of decades past as much as we’re looking at today’s damage.
Our Level-2 camera inspections end with photos you can see and a plain-English verdict. No jargon, no scare tactics. If your 1987 liner patch is holding, we’ll say so. If it’s shedding clay into your flue, we’ll show you the image and explain exactly what it means for your heating system. The 90-Day Done Right Promise covers every job in writing - if it’s not right, we come back, no paperwork, no arguing.
Calls are answered by a live person 24 hours a day, 7 days a week. Not a callback queue. Not an app. A real person who can dispatch a background-checked, uniformed technician to Franklin Square, usually same day. Most jobs are completed in a single visit, with no-hassle upfront pricing - the number on the estimate is the number on the invoice.
Our Chimney Liner & Rebuild Services in Franklin Square
Stainless Steel Liner Installation
Stainless steel liners are our most common recommendation for Franklin Square’s oil-to-gas conversions. The original clay flue tiles in these 1950s Cape Cods were never meant to handle the acidic condensation that gas appliances produce. A properly sized DuraFlex stainless steel liner creates a sealed, corrosion-resistant path from appliance to cap, and we size them precisely for your BTU load - not with a one-size-fits-all approach. In Franklin Square’s freeze-thaw climate, the expansion tolerance of quality stainless matters. We’ve installed these from Dogwood Road to the Malverne border, and they carry a lifetime warranty when properly maintained.
Flexible Liner Systems
Some Franklin Square chimneys have offsets, bends, or tight cleanout locations that make rigid liners impractical. Flexible liners navigate these obstacles without breaking the flue’s continuous seal. For the older ranches near Hempstead Turnpike with single-flue chimneys serving both furnace and water heater, flexibility can mean the difference between a proper installation and a compromised one. We source our flexible systems from Olympia Chimney and Famco - professional-grade, not the builder-grade substitutes that some installers use to cut corners.
Liner Replacement
Replacement is not the same as first-time lining. In Franklin Square, we’re often removing failed patch jobs - the quick fixes from the 1980s and ’90s that homeowners were told would last forever. Clay-tile fragments, corroded connectors, improperly sized transitions: we document it all with camera footage before we touch anything. Then we install a complete replacement system, properly insulated and capped, with a written guarantee. The job on Radnor Road we mentioned earlier? That was a replacement, not a repair. The 1988 patch had concealed a deteriorating original liner that was actively dangerous.
Partial and Full Chimney Rebuild
When freeze-thaw damage has undermined the chimney structure itself, a new liner won’t solve the problem. Franklin Square’s inland position - no salt air, but no wind break either - subjects brick and mortar to repeated expansion-contraction cycles that coastal Long Island towns don’t experience as severely. Spalling brick, eroded joints, and leaning stacks are common on 70-year-old chimneys near Rath Park and throughout the 11010 zip code. Partial rebuilds address the upper sections and crown; full rebuilds start from the roofline up. Either way, we match existing brick where possible and always install a proper crown wash and cap to protect the investment.
What happens when you call
- 1
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 don’t use generic or builder-grade materials. For Franklin Square installations, we specify DuraFlex stainless steel liners, HeatShield cerfractory resurfacing for select clay-tile restorations, and caps and fittings from Gelco, Olympia Chimney, and Famco. These are the brands that professional sweeps specify when they’re doing the job for their own families. We stock common diameters and fittings locally, so most Franklin Square customers aren’t waiting on special orders. When your heat is off in January, that turnaround matters.
Common Chimney Liner & Rebuild Problems We See in Franklin Square Homes
- Oversized flues trapping gas condensation. The original chimneys on Franklin Square’s Cape Cods and ranches were engineered for oil-burner draft, which requires a larger flue diameter. Convert that same chimney to gas, and the flue is too big - exhaust cools too fast, condensation forms, and clay tiles deteriorate from the inside out. We measure flue size against appliance output on every inspection.
- Failed 1980s-’90s patch jobs creating hidden hazards. Homeowners who paid for a relining during the first conversion wave often assume the problem is solved permanently. We’re finding those patches failing now - clay fragments in the firebox, corroded connectors, even partial collapses. A standard sweep won’t catch this; a Level-2 camera inspection will.
- Freeze-thaw spalling undermining liner support. Franklin Square’s inland climate produces harder freeze-thaw cycling than coastal towns. Brick faces spall, mortar joints erode, and the chimney structure that holds your liner in place slowly degrades. We inspect exterior masonry as part of every liner evaluation.
- Single flues serving multiple appliances. Many Franklin Square ranches have one flue handling both furnace and water heater. If that flue is compromised, both appliances are venting into your living space. Liner integrity isn’t optional in these configurations - it’s critical.
Pricing for Chimney Liner & Rebuild in Franklin Square, NY
Here’s what Franklin Square homeowners can expect:
| Service | Typical Range |
|---|---|
| Stainless steel liner (standard single-flue) | $2,800 - $4,200 |
| Stainless steel liner (double-flue or complex) | $4,000 - $5,500 |
| Flexible liner system | $2,400 - $4,500 |
| Liner replacement (removal + new install) | $3,200 - $5,800 |
| Partial chimney rebuild | $4,200 - $7,500 |
| Full chimney rebuild | $8,500 - $14,000 |
| Level-2 camera inspection with report | $289 - $350 |
What moves the number? Height of the chimney, number of flues, accessibility (steep roof pitches cost more), and whether we’re removing a failed existing liner. Oil-to-gas conversions with no prior relining are often straightforward; second-generation replacements where we have to extract corroded hardware take more time. We provide no-hassle upfront pricing before any work begins - the estimate is the invoice. Seniors and veterans receive a permanent 5% discount, and we offer $50 off any repair over $250. Call (855) 950-3861 for a free estimate.
We Also Serve Cities Near Franklin Square
Our Chimney Liner & Rebuild in Franklin Square crew also responds to calls in Lakeview, West Hempstead, Elmont, and Malverne - the same post-war housing stock, the same conversion histories, the same need for careful liner assessment. If you’re in one of these neighboring communities and suspect your chimney has a hidden liner problem, the same live-answer phone line and same-day scheduling applies.
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 Liner & Rebuild in Franklin Square
Probably, if that relining was a patch job rather than a full stainless steel system. The 1980s and ’90s conversion boom in Franklin Square produced a lot of quick fixes - clay-tile repairs, partial sleeves, connectors that were never meant to last 30+ years. We’re finding these failing now, often with hidden clay fragmentation or corrosion that a basic sweep won’t reveal. A Level-2 camera inspection will show you exactly what you have. Call (855) 950-3861 to schedule one - estimates are free, and we document everything with photos you can see.
That smell is hydrogen sulfide and combustion byproducts leaking through a compromised flue, not normal exhaust. Gas appliances produce more moisture and different acids than oil burners, and if your Franklin Square chimney still has its original oversized flue or a failing liner, that exhaust isn’t venting properly. It’s condensing in the flue, corroding whatever’s left, and seeping into your home. This is a safety issue, not a nuisance. Call (855) 950-3861 - we’ll inspect it same day and give you a plain-English verdict on whether you need a liner replacement.
Structure versus function. If the exterior brick is spalling, mortar joints are eroded to finger-depth, or the chimney is leaning, the masonry itself is failing and a liner alone won’t help. Franklin Square’s freeze-thaw cycles accelerate this. We inspect exterior masonry as part of every liner evaluation and show you photos of what we find. A sound structure with a bad liner gets a liner. A compromised structure gets rebuilt, then lined. Call (855) 950-3861 and we’ll tell you which category you’re in - no charge for the assessment.
Rigid stainless steel is our default for straight chimneys because it maintains optimal draft and cleans more thoroughly. Flexible liners are the right choice when your chimney has offsets or tight access that rigid pipe can’t navigate. Both handle Franklin Square’s temperature swings if they’re properly insulated - and we insulate every installation we do. The “better” option depends on your chimney’s geometry, not the weather. We’ll assess yours and recommend accordingly, with no pressure either way. Call (855) 950-3861 for a free evaluation.
It can be, if the flue is properly sized, structurally sound, and lined with an intact system. In Franklin Square’s older ranches, we’re finding single flues that were never relined for gas, or that have failing 1980s patches. With two appliances depending on one vent path, any compromise means both are at risk of backdrafting carbon monoxide into your living space. We treat single-flue configurations as high priority and inspect them with extra care. Call (855) 950-3861 - if your liner hasn’t been camera-inspected in the last two years, it’s time.
Written by Frank Calucci, Owner at Hearthstone Chimney Co., serving Franklin Square and local communities since 1984.