Fast, Reliable Duct Repair & Sealing Across Brooklyn
Brooklyn duct repair and sealing typically costs $180-$650 depending on the scope, and most jobs are completed in a single visit. If your home has leaky, corroded, or poorly sealed ductwork, you’re paying to heat and cool spaces that were never meant to be conditioned.
We know Brooklyn’s housing stock inside and out. From the 1880s brownstones of Bed-Stuy and Crown Heights to the 1960s semi-detached brick homes in Flatbush and Borough Park, we’ve repaired ductwork in every building type this borough throws at us. Our Duct Repair & Sealing crews work out of our Cleveland office and dispatch daily to Brooklyn neighborhoods, usually arriving within 2-3 hours of your call. We understand the parking constraints on narrow streets, the tight access through basement bulkheads in row houses, and the non-standard duct runs that retrofitted systems demand. Call (844) 685-6342 for a free estimate - we’ll give you one honest price before we lift a single tool.
Why Bellows Air Duct & Vent Co. Is Brooklyn’s Preferred Duct Repair & Sealing Company
Brooklyn homeowners have called Bellows for over 42 years because we do what we say we’ll do, and we stand behind it. Ray Castillo has led this company since 1984 with a simple standard: the job isn’t finished until the homeowner sees the before-and-after camera footage and the work is backed by our 90-Day Done Right Promise in writing.
Our technicians are background-checked, uniformed, and trained on the specific duct configurations found in Brooklyn’s pre-war and post-war housing. They carry mastic sealant, foil tape, and fiberglass duct insulation sized for the cramped bays and irregular joist spaces that define this borough’s retrofitted systems. Calls are answered by a live person 24 hours a day - not a voicemail tree, not an app. Most Brooklyn repairs are completed in one visit.
We serve Brooklyn with the understanding that your home wasn’t built for forced air. The ductwork was squeezed in later, often poorly, and it’s our job to make that retrofit perform as if it were original.
Our Duct Repair & Sealing Services in Brooklyn
Duct Sealing
Leaky ducts are the single biggest efficiency killer in Brooklyn’s older housing. In brownstones and row houses where supply runs share wall cavities with century-old plaster and lath, unsealed joints pull in dust, debris, and moisture from spaces that were never meant to connect to your air stream. Our crew seals every accessible joint with mastic sealant and foil tape - not hardware-store duct tape, which fails within weeks in Brooklyn’s humid maritime air. We pressure-test the system after sealing to verify the fix.
Metal Duct Repair
Brooklyn’s 1950s-1960s semi-detached brick homes in East Flatbush, Flatbush, and Borough Park have original sheet-metal ductwork that is now 60-plus years old, corroding at seams and coated with decades of cooking grease from adjacent kitchen exhaust chases. This combination is unique to the dense row-building style where supply-air and kitchen chases share walls. We replace corroded sections, re-seal joints with professional-grade mastic, and wrap vulnerable trunks in fiberglass insulation to prevent condensation and further degradation.
Flex Duct Repair
Flex duct is common in Brooklyn attic retrofits and basement conversions, but it’s easily crushed during renovations or degraded by the temperature swings in unconditioned spaces. We replace kinked or torn flex runs with properly sized, insulated flex duct supported at code-required intervals. In Crown Heights and Clinton Hill brownstones where attic clearances are minimal, we route flex through the tightest spaces without compressing the diameter.
Duct Insulation
Uninsulated metal ducts in Brooklyn’s damp basements and crawl spaces sweat, breed mold, and waste energy. We wrap supply trunks and exposed runs with fiberglass duct insulation, sealed at all seams with mastic. This is especially critical in brownstone basements along the East River and Jamaica Bay, where groundwater and tidal humidity keep relative humidity persistently high.
Mastic Sealant Application
Mastic is the only sealant that lasts on old sheet-metal joints in Brooklyn’s climate. We brush or spray a thick coat at every joint, seam, and penetration, then reinforce with foil tape where code requires. Our crew recently re-sealed the original duct seams in a 1962 semi-detached on Avenue J in Flatbush. The 60-year-old sheet-metal ducts had gaps at every joint, sucking in dust from plaster-and-lath walls, and were thick with grease from the shared kitchen chase. We applied mastic sealant at all leak points and wrapped the main trunk in fiberglass duct insulation, quieting the system and cutting the homeowner’s energy waste.
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 Brooklyn
We stock parts and materials from Abatement Technologies, Rotobrush, and Aprilaire - the same brands serious HVAC contractors specify for commercial and residential work. For Brooklyn customers, this means faster turnaround on repairs that require specific fittings, insulation wraps, or sealant formulations. We don’t order parts from a catalog while you wait. Our trucks carry the inventory to handle most metal duct repairs, flex duct replacements, and full sealing jobs on the first trip, whether we’re working on a 1920s brownstone near Prospect Park or a 1960s semi-detached in Borough Park.
Common Duct Repair & Sealing Problems We See in Brooklyn Homes
- DIY duct tape failures on old sheet-metal joints. Homeowners in Brooklyn try sealing corroded seams with hardware-store duct tape, but it degrades within weeks in the borough’s humid maritime air. Without mastic and foil tape, seams reopen and pull in dust from century-old wall cavities.
- Mold spores entering through gaps in row-house duct runs. Ignoring gaps along the duct run in brownstones allows mold from damp basements to enter the air stream, causing allergy flare-ups that cleaning alone can’t fix. Sealing is the only permanent solution.
- Missed joints after duct cleaning. Technicians often clean ducts without sealing the joints where retrofitted mini-ducts meet original plaster-and-lath. The system stays as leaky as before, and allergens return within months. We seal what others skip.
- Grease-corroded seams in Flatbush and Borough Park semi-detached homes. The shared wall between kitchen exhaust and supply-air chases deposits cooking particulate on 60-year-old metal ducts, accelerating corrosion at seams. This building type is specific to Brooklyn’s 1950s-1960s developments.
Pricing for Duct Repair & Sealing in Brooklyn, OH
We show you one honest price before we start. No bait coupons, no changes at the door.
| Service | Typical Range in Brooklyn |
|---|---|
| Duct sealing (mastic, single system) | $180-$340 |
| Metal duct repair (section replacement) | $250-$480 |
| Flex duct repair/replacement (per run) | $150-$290 |
| Duct insulation (wrap, per trunk line) | $200-$380 |
| Full system sealing + insulation | $450-$650 |
Costs vary with accessibility - brownstone basements with 6-foot ceilings take longer than open crawl spaces - and with the condition of existing ductwork. A 1960s semi-detached with grease-corroded seams throughout requires more material and labor than a single leaky joint in a newer retrofit. We offer $50 off any repair over $250, a free second opinion on any written estimate, and a permanent 5% senior and veteran discount. Call (844) 685-6342 for your exact quote - estimates are free, and you’ll know the full price before we begin.
We Also Serve Cities Near Brooklyn
Our crews work throughout the west side of Cleveland and surrounding communities. If you’re in Detroit-Shoreway, Parma, Parma Heights, or Clark-Fulton, the same technicians, same equipment, and same 90-Day Done Right Promise apply. Dispatch is coordinated from our Cleveland office, and we schedule to minimize your wait.
Serving Brooklyn, OH - Our Local Coverage Area
We’re based in the Brooklyn 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 - Duct Repair & Sealing in Brooklyn
Your original sheet-metal ductwork was installed in the 1950s or 1960s with simple snap-lock seams and no sealant. Sixty years of thermal expansion, corrosion from Brooklyn’s humid air, and grease infiltration from shared kitchen chases have opened every joint. The fix is mastic sealing at all seams, not duct tape. Call (844) 685-6342 for a free inspection - we’ll show you the gaps on camera.
Yes, if the smell is coming from your duct system. In Crown Heights brownstones, unsealed duct joints pull in basement air that carries mold spores and damp odors from century-old wall cavities. Sealing those joints with mastic stops the infiltration. If the source is a water intrusion problem, we’ll tell you that too - we don’t sell sealing for a job that needs waterproofing. Call for an honest assessment.
Mastic sealant applied with a brush or spray nozzle, reinforced with foil tape at high-stress joints. The tight bays in Brooklyn row houses make conventional wrapping impossible, but mastic flows into gaps that tape can’t reach. We verify the seal with a pressure test after application. This is standard procedure on our Brooklyn jobs - we do it on every row-house sealing.
Yes. Crushed flex duct or dented metal sections are replaced, not patched - a partial collapse permanently restricts airflow and creates turbulence that deposits debris. In Clinton Hill’s tight spaces, we often route replacement duct through alternate bays to avoid the damaged pathway. Most repairs are completed in one visit. Call (844) 685-6342 to schedule.
Every 3-5 years for homes with original 1960s metal ductwork, or sooner if you notice uneven heating, rising energy bills, or allergy symptoms that worsen when the system runs. Borough Park’s shared kitchen chases accelerate grease buildup and corrosion, so proactive inspection catches seam failures before they pull in significant debris from wall cavities. We offer $89 seasonal tune-ups that include a camera inspection and leak check. Call to book.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Brooklyn and surrounding communities since 1984.