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.
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AfterFast, Reliable Chimney Liner & Rebuild Across Smithtown
A chimney liner replacement or partial rebuild in Smithtown, NY typically runs $2,800 to $6,500 depending on whether we’re relining one flue or rebuilding the top section of the stack. Most calls we get from Smithtown homeowners are for oil-to-gas conversion relines on 1950s and 1960s homes, and we can usually get a crew to your street within two to three business days. If you’re in Kings Park, Nesconset, or central Smithtown and your home still has its original unlined brick chase, call (516) 968-5380 and we’ll walk you through what you’re likely looking at before we even schedule the visit.
Top Hat Chimney has been working these neighborhoods long enough to know which subdivisions have the problem chases and which ones just need a crown patch. Wendell Pike and his crew live with this work, not just visit it. That matters when you’re trying to figure out whether a $3,000 liner quote is honest or whether a full rebuild is actually necessary.
Why Top Hat Chimney Is Smithtown’s Preferred Chimney Liner & Rebuild Company
Smithtown’s housing stock is dense with mid-century builder-grade chimneys, and we’ve been inside enough of them to know exactly what fails first. The homes built between 1955 and 1978 through hamlets like Kings Park, Nesconset, and central Smithtown commonly use the same common-brick chimney with lime-based mortar. After five decades of Long Island Sound salt air and roughly 100 freeze-thaw cycles per year, those mortar joints erode from the outside while acidic oil-exhaust soot eats the parging from the inside.
Smithtown homeowners call us because we give them the camera footage and a plain-English verdict every time, no exceptions. When we tell you a flue needs a stainless liner, we show you the video of the failed mortar and the cross-contamination gap. If a partial rebuild can wait a season, we say so. That’s why people in Smithtown keep our number on the fridge and pass it to the neighbor whose boiler was just flagged during a home inspection.
Response time to Smithtown is straightforward: we answer the phone with a live person, schedule you a real arrival window, and if the crew slips, we call you. If you’re inside the county, there’s no trip charge. And every completed job comes with the 90-Day Done Right Promise in writing, so if something isn’t right after we leave, one call brings Wendell back.
Our Chimney Liner & Rebuild Services in Smithtown
Stainless Steel Liner
Most oil-to-gas conversions in Smithtown homes require a 6-inch stainless liner run from the boiler connection up through the existing chase. We typically install DuraFlex or Gelco stainless systems because they hold up to the acidic condensation that gas combustion produces, which is a different chemistry than what the original oil flue was built to handle. In a Kings Park split-level, this is often the difference between a safe, efficient gas boiler and a flue that fails a Level 2 inspection at closing.
Flexible Liner
For Smithtown homes where the existing chase has offsets or the original builder ran flues at odd angles, a flexible stainless liner often avoids a full tear-out. We use it when we can heat-shield and insulate the existing masonry rather than demolish it, which keeps the price down and the work moving faster. In Nesconset subdivisions where two flues share one chimney, flex liner lets us reline one channel without disturbing the neighbor’s side.
Liner Replacement
If your oil boiler is being converted to gas and the original flue is unlined or has failed tile, a liner replacement in Smithtown is not a luxury. It’s the only way the new appliance passes inspection and vents safely. We remove the failing liner material, assess the chase, and install a new stainless liner sized for the BTU load of your specific boiler. The price difference between just replacing a liner and also rebuilding the crown above it is worth knowing about before you sign anything.
Partial Rebuild
Salt air near Long Island Sound has a habit of spalling the top courses of brick on Smithtown chimneys while the lower section stays sound. In those cases we do a partial rebuild from the roofline up: new brick, fresh mortar, a poured concrete crown, and a proper multi-flue cap. This runs less than a full rebuild and usually solves the water intrusion that’s been slowly ruining your liner from above.
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 Smithtown
We stock and install liner systems from DuraFlex and Gelco, and we regularly work with Olympia Chimney and Copperfield components including caps, dampers, and flashing. For Smithtown homes undergoing oil-to-gas conversion, we keep common 6-inch and 7-inch stainless kits on the truck so we don’t have to reschedule for parts after the inspection. That means less time with your heat down and no second trip charge while we wait on a distributor.
Common Chimney Liner & Rebuild Problems We See in Smithtown Homes
- Shared flue cross-contamination in Kings Park subdivisions: The original builder ran the oil-boiler exhaust and the fireplace flue through one unlined brick chase with minimal wythe separation. Decades later, a neighbor’s oil exhaust bleeds through a hairline gap into your flue, and the fix is a full stainless reline of the second channel.
- Salt-air accelerated spalling on older common brick chimneys: Living within a few miles of Long Island Sound means salt-laden air works into lime-based mortar joints long before inland Suffolk chimneys show the same wear. We see this most in mid-century ranches where the original crown was never properly overhung or tooled.
- The original builder’s unlined brick chase in Nesconset: No tile liner in either channel. It went uninspected for decades, and it’s discovered during a pre-purchase Level 2 inspection when the home is under contract. The seller is then looking at a full stainless reline before closing, which drives a lot of emergency calls we get from that area.
- Failed parging from oil exhaust: Oil-fired boilers produce sulfur-laden soot that eats lime-based parging from the inside out. In Smithtown’s 1955-1980 housing stock, we routinely find parging that looks like sandpaper and has fallen away from the flue walls, leaving raw brick exposed to hot exhaust.
Pricing for Chimney Liner & Rebuild in Smithtown, NY
A stainless liner replacement for a single oil-to-gas boiler flue in Smithtown typically runs $2,800 to $4,200, including the liner, insulation, connector fitting, and cap. A partial rebuild from the roofline up adds roughly $1,800 to $3,200 depending on the number of brick courses and whether we need custom flashing. A full chimney rebuild in Smithtown, where salt air has left the structure unsafe, generally falls between $7,000 and $14,000 depending on height, access, and whether we’re rebuilding from the roofline or from the foundation.
What moves the number: roof pitch and access, whether the chase is shared, the number of flues, and whether scaffolding is needed for a steep pitch on a split-level. Before any work begins, you get a written, upfront price. The number you hear on the phone is the number on the invoice. We offer a free second opinion on any competing written estimate, and if you’re a senior or veteran in Smithtown, you get 10% off, always.
Key Takeaways:
- Smithtown’s oil-to-gas conversions are driving most liner replacements, not fireplace creosote.
- Shared unlined chases in Kings Park and Nesconset commonly need full stainless relining before a home sale can close.
- Salt air and 100 freeze-thaw cycles per year mean crowns and top courses fail faster here than inland.
- Upfront pricing before any tool comes off the truck, plus a 90-Day Done Right Promise in writing.
We Also Serve Cities Near Smithtown
If you’re in Commack, Brentwood, or Huntington Station, the same crew that works Smithtown handles those calls. We also get plenty of liners and rebuilds from Huntington proper. Much of our Chimney Liner & Rebuild work starts with a home inspection in one of these towns and ends with a reline before closing. Wherever you are in the area, the person who shows up is the person who gave you the quote.
Serving Smithtown, NY - Our Local Coverage Area
We’re based in the Smithtown 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 Smithtown
Because the original mid-century builder ran oil-boiler exhaust and fireplace flues through a single unlined brick chase with no tile liner, and gas combustion produces different condensation chemistry that those old chases were never designed to handle. The flue must be fully relined in stainless before the home can pass its real-estate transaction inspection. Call (516) 968-5380 if your Smithtown home is mid-conversion and you’re not sure what you’re looking at, the estimate is free.
Salt-laden air from Long Island Sound settles into lime-based mortar joints and accelerates erosion, spalling brick and cracking crowns much faster than what inland Suffolk homes experience. The same salt air corrodes dampers, caps, and liner connectors. A compromised crown lets water into the flue, which then damages the liner from the inside, so the two problems compound each other over a single season.
If your Kings Park home was built between roughly 1955 and 1978 and still has its original chimney, there’s a real chance the builder ran the boiler exhaust and a dormant fireplace flue through one unlined brick chase with no tile liner. The only way to know for sure is a camera inspection, which we include with every liner assessment. If you’re under contract on a home, this is exactly what a Level 2 inspection is designed to catch.
Yes, in most cases a flexible stainless liner can be run through one channel without disturbing the other side of a shared chimney. In Nesconset and Kings Park subdivisions, we regularly isolate one flue while preserving the neighbor’s channel, though if cross-contamination is already happening, both sides usually need attention. We’ll show you the camera footage and tell you plainly whether you need one side or both.
A Level 2 chimney inspection is commonly required by the buyer’s home inspector or mortgage lender when a Smithtown home changes hands, especially if the house has an oil boiler or a shared chase. If the inspection finds an unlined flue or failed parging, the seller is typically on the hook for a full stainless reline before closing. We do these inspections regularly and provide the camera footage and a written report the agent and attorneys need to close.
If you’re in Smithtown and you’ve been told you need a liner, a rebuild, or both, call us at (516) 968-5380. We’ll tell you what’s actually wrong, what can wait, and what it will cost, in plain English, before you commit to anything.
Written by Wendell Pike, Owner at Top Hat Chimney, serving Smithtown and surrounding communities since 1999.