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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AfterDuraFlex Chimney Cleaning in Franklin Square, NY | Top Hat Chimney
We clean and service DuraFlex chimney liners across Franklin Square, and we do it as an independent shop. That means we’re not tied to any manufacturer’s sales targets, so when we tell you a liner needs work, it’s because the camera footage says so. What makes our DuraFlex work here different comes down to one thing: we know what happens to a stainless liner when an old oil flue gets abandoned after a gas conversion and nobody caps it. Call (516) 963-1068 for a straight answer and a free estimate.
Why Franklin Square Residents Choose Us for DuraFlex Service
We’ve been pulling DuraFlex liners out of Franklin Square chimneys long enough to recognize the exact failure patterns these houses produce. Wendell Pike and his crew have worked this part of Nassau County since 1999, and the chimneys here tell a very specific story. Cape Cods and ranches built between 1945 and 1965 with original terra-cotta liners, decades of heating-oil use, then a wave of gas conversions. That sequence leaves behind a particular set of liner problems you won’t find in newer developments. If it doesn’t need doing, we’ll tell you.
We stock DuraFlex sales & service parts for the model lines common in Franklin Square, so a coupler, top plate, or rain cap often goes on same week. Every job gets the 90-Day Done Right Promise in writing, and the price we quote before work starts is the price on the invoice. Seniors and veterans always get 10% off, and any repair over $200 takes $40 off. That’s just how we’ve run it for over 29 years.
Common DuraFlex Chimney Cleaning Problems We Solve in Franklin Square
- 316L pitting from sulfuric acid condensation. When a Franklin Square homeowner switched from oil to gas but left the old oil exhaust path open, the abandoned flue becomes a condensation chamber. Sulfur residue mixes with moisture and eats at the liner walls. We see this mostly in the shared chimneys of postwar ranches where the gas furnace vented out the side wall and nobody capped the terra-cotta oil flue.
- Tear-drop deformation from freeze-thaw movement. Long Island winters put Franklin Square chimneys through more freeze-thaw cycles than inland towns. Salt-laden air works its way into mortar joints, and when the masonry shifts, a flex liner can kink or flatten into a tear-drop cross-section. Restricted draft is the first sign. We’ve found this pattern on more Capes here than anywhere else we work.
- Disconnected sections at the clay tile transition. Older Franklin Square chimneys with original terra-cotta tiles expand and contract with every heating season. Over 60 to 80 years of thermal cycling, the transition point where flex liner meets clay tile loosens, and sections can separate. The furnace keeps running, but exhaust leaks into the chimney cavity instead of venting out.
- Pooling acidic soot at the liner base. Oil-fired flues with improper pitch collect soot at the bottom bend. In Franklin Square homes that still burn oil, the sulfur-heavy condensate sits against the 316L welds and accelerates corrosion. A proper cleaning catches it early. Ignored, it turns a brush job into a replacement.
- Rain cap and top plate failures after nor’easters. Horizontal rain driven by coastal storms finds its way past worn top plates and caps. Once water gets inside a DuraFlex liner in Franklin Square, it runs down and pools, corroding from the inside out. We replace more top plates and rain caps in the spring than any other season.
DuraFlex Service in Franklin Square: What Local Conditions Mean for Your Equipment
Franklin Square’s oil-to-gas conversion rate was especially high in the 1990s and 2000s. Drive down Fenimore Street or any of the side roads off Hempstead Turnpike, and you’ll pass house after house where the furnace once burned oil and now runs on gas. Here’s the part most people don’t know: many of those homes kept the old oil flue inside the shared masonry chimney, uncapped, while the new gas furnace vented sideways through the wall. That abandoned oil liner becomes a hidden moisture chimney. It pulls salt-laden Nassau County air up through it, condenses on the cool terra-cotta, and drips down onto whatever else shares that chimney. If you have a DuraFlex liner serving your fireplace flue in the same stack, the runoff from that abandoned oil flue rots it from the outside. The liner wasn’t designed to sit in brine. In Franklin Square, this is the defining DuraFlex problem. The fix isn’t just cleaning the liner. It’s capping the abandoned flue with a proper top plate and sealing the top of the chimney so storm water stops funneling down.
We pulled a 316L liner out of a ranch on Fenimore Street that had ballooned at a bulge where a corroded oil flue tile pressed against it. The homeowner had converted to gas years earlier but never capped the old flue. Every nor’easter drove rain straight down onto the DuraFlex. We sleeved the damaged section with an OEM coupler, sealed the abandoned flue with a new top plate, and confirmed draft with a Level 2 inspection.
DuraFlex Models & Products We Service in Franklin Square
Our Franklin Square service covers the full DuraFlex lineup: 316L flexible stainless, the workhorse for wood, oil, and gas flues; 304 alloy for high-temperature wood-burning setups; DuraFlex Pro, the heavier gauge built for high-efficiency gas appliances; and DuraFlex Smooth Wall for installations where draft is critical. We install OEM DuraFlex components, including liners, top plates, and rain caps, because mixing aftermarket parts with a DuraFlex system invites fit and warranty problems. When a liner is sound and only a section is damaged, we’ll say so. Sometimes an $80 coupler beats a $1,200 re-line, and we’ll show you the camera footage to prove it.
DuraFlex Service Pricing in Franklin Square
Here’s what you can expect to pay in Franklin Square, straight from the invoice of a local independent shop.
- Chimney sweep with camera inspection: $189-$249
- Level 2 inspection (after a liner repair, storm, or home sale): $250-$375
- DuraFlex liner section repair (coupler or sleeve): $200-$500
- Full DuraFlex liner replacement: $1,800-$3,500 depending on flue height and access
- Top plate or rain cap replacement: $150-$400
Several things drive the final number for Franklin Square work: roof pitch and chimney height on these older Capes, whether the liner runs a single flue or shares a masonry stack, and how much the existing liner has degraded. Every estimate includes a camera inspection and a plain-English report of what we found. No trip charge inside our service county, and we’ll honor a free second opinion on any written estimate you’ve received. Call (516) 963-1068 and we’ll give you an exact number before any tool leaves the truck.
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 - DuraFlex Chimney Cleaning in Franklin Square
Sometimes, but not as-is. Oil exhaust leaves sulfur deposits that are acidic and corrosive to 316L. Before a liner is reused for gas, it needs a full inspection for pitting and weld corrosion, plus a professional cleaning to remove the sulfur residue. If the liner is sound, it can work. If we see pinholes or thinning at the welds, reuse is a gamble we won’t recommend. Call (516) 963-1068 and we’ll inspect it before you spend money either way.
Usually the water isn’t coming through the liner. It’s coming around it. A failed top plate, cracked crown, or open mortar joints let rain into the chimney cavity, and that water runs down the outside of the liner into your firebox. In Franklin Square, nor’easters drive rain horizontally, which makes worn crowns and missing caps worse. The fix is a top-end sealing job, not a new liner. We’ll confirm it with the camera before recommending anything.
Once a year, burn or no burn. Oil flue chimneys accumulate sulfurous soot that corrodes liners faster than wood creosote does. In Franklin Square homes that still run oil, an annual Franklin Square Chimney Cleaning & Sweep is the cheapest insurance against a liner replacement. Three hundred dollars of cleaning beats three thousand dollars of re-lining. Call (516) 963-1068 to get on the schedule before the next heating season.
Yes, and in Franklin Square this is one of the most common requests we get. When the furnace went gas and side-walled, the old oil liner became a moisture chimney. We cap the abandoned flue with a sealed top plate and, where useful, run a Level 2 inspection to confirm no cross-flue leakage into the active liner. It’s a permanent fix and costs far less than replacing a second liner you no longer use. Give us a call at (516) 963-1068 and we’ll walk you through it.
Our Chimney Repair in Franklin Square team fixes what we can and replaces what we must. A small damaged section in an otherwise sound liner often takes an OEM coupler or sleeve. A liner with widespread pitting, separated sections, or tear-drop deformation gets replaced. The decision comes down to camera evidence and Wendell’s read on how much life is actually left. If the repair won’t hold, we’ll tell you before we quote it. Call (516) 963-1068 for a free estimate either way.
Service Areas Near Franklin Square
We handle DuraFlex service across the neighboring towns around Franklin Square. That includes DuraFlex service in Hempstead, DuraFlex service in Garden City, West Hempstead, Westbury, and Uniondale. If you’re within our Nassau County service area, there’s no trip charge.
Book Your DuraFlex Service in Franklin Square Today
If your DuraFlex liner hasn’t been inspected since last winter, or you converted from oil to gas and never dealt with the old flue, now is the time. Call (516) 963-1068 for a free estimate and a live person. We serve Franklin Square service area chimneys year-round, and the camera doesn’t lie.
Written by Wendell Pike, Owner at Top Hat Chimney, serving Franklin Square since 1999.