Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterFast, Reliable Duct Sealing Across Woburn
We dispatch to Woburn from our Boston office for Woburn Dryer Vent Cleaning and other services, and crews are usually on-site in Woburn within the same scheduling window we quote. If you’re in the Four Corners neighborhood, near Horn Pond, or in one of the triple-deckers downtown, we’ve worked on your type of ductwork before. Call (361) 326-5060 for a free estimate.
Woburn’s housing stock tells its own story: 19th-century mill-worker tenements with original sheet-metal trunks, 1950s ranches in the Horn Pond area with their first round of flex-duct retrofits, and newer builds along the I-95 corridor with tight envelopes but sloppy sealing at the boots. Each needs a different approach. Our Duct Sealing team doesn’t run the same protocol on every house. We inspect first, price in writing, then seal what actually needs sealing.
Why Hollis Air Duct Cleaning Is Woburn’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our reputation in Woburn is built on showing up when we said we would and leaving the price where we wrote it. No estimates that balloon once the technician is inside your home.
Woburn customers call us back because our 365-Day Done Right Promise is backed in writing on every job. If the work fails within a year, we return and make it right at no charge, including a free second visit. That’s not a slogan; it’s a clause on your invoice.
Our technicians are background-checked and uniformed, and our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues. When you schedule Duct Sealing in Woburn, you know who is walking into your home before they arrive.
We know the local conditions: the black, sooty buildup in return ducts near the I-93/I-95 interchange that homeowners mistake for mold. The original gravity-furnace ducts in downtown tenements that leak at every seam under modern blower pressure. The flex duct in Four Corners capes that sags after thirty years of summer humidity. This knowledge changes what we recommend and how we price it.
Air Duct Sealing in Woburn
Air Duct Sealing in Woburn is most often a repair job, not a luxury upgrade. In the Four Corners and Horn Pond neighborhoods, original sheet-metal supply and return ducts from the 19th-century tenement and triple-decker era were sized and assembled for gravity furnaces, so their joints leak at nearly every seam once a modern blower motor pressurizes the system. Sealing here is a per-joint retrofit, not a one-pass aerosol job. We clean each seam to bare metal, apply mastic or foil tape rated for the temperature range, and test with a manometer before we leave.
A typical Air Duct Sealing job in Woburn runs $450 – $1,200 depending on how many seams need attention, whether we need to reconstruct crushed runs, and whether the air handler cabinet itself needs gasket work. We give you a written price before any work starts.
What We Find in Older Woburn Homes
Foil tape or mastic failing at the original sheet-metal seams of mill-era tenements near downtown, where decades of heating-oil residue keep new sealant from bonding unless the joint is cleaned to bare metal first. We don’t seal over grime. We prep the surface, then seal.
Highway Particulate and Pressure Loss
Highway particulate from the I-93/I-95 corridors loads the return side until the air handler cabinet and blower motor are fouled. Homeowners sometimes ask us to “seal the ducts” when the real pressure loss sits at a filter grille with too low a MERV rating. We check the whole system, not just the trunk lines.
Duct Sealing Services in Woburn
Duct Sealing Services in Woburn cover everything from spot repairs at accessible joints to full-system sealing after a camera inspection. We use professional-grade equipment from Rotobrush and Nikro, and we carry mastic, foil tape, and collar hardware sized for both vintage sheet-metal and modern flex duct. Every job receives a written price before work begins and is covered by our 365-Day Done Right Promise.
We pulled up to a 1920s triple-decker near Four Corners where the second-floor registers were barely moving air and the return grille in the hall was coated in black soot the homeowner was sure was mold. Camera inspection showed a crushed flex run a previous remodeler had buried behind a knee wall plus two disconnected sheet-metal trunk sections, so we reconnected the runs, sealed the seams, and dialed the blower back to its rated static pressure. The soot was highway particulate and old heating oil residue, not mold, and airflow at the registers came back within an hour.
Flex Duct Reconstruction
Flex duct runs in Four Corners and Horn Pond capes sag, kink, or pull loose from collars after a remodel, leaving a crushed run that sealing alone can’t fix without reconstruction. We replace the damaged section, support it properly, then seal the connections.
System Balancing After Sealing
Sealing changes static pressure. We measure before and after with a digital manometer, then adjust dampers or blower speed so rooms that were starved get their design airflow. A sealed duct system with unbalanced dampers can create new problems.
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 Woburn
We stock parts and materials from Rotobrush, Nikro, and Guardsman for Woburn jobs, which means most repairs don’t wait on a parts run. Rotobrush rotary brush systems handle the mechanical cleaning we do before sealing; Nikro negative-air machines keep debris contained during the work; Guardsman filtration products let us upgrade your filter grille while we’re sealing the return plenum. If your system uses Honeywell or Aprilaire filtration, we carry those components too. Fast turnaround matters in Woburn, where heating season runs long and a day without heat is a real problem.
Common Duct Sealing Problems We See in Woburn Homes
- Failed sealant at oil-heated tenement seams. Downtown Woburn’s mill-era homes burned heating oil for decades, and that residue saturates the original sheet-metal joints. New mastic won’t bond until we clean to bare metal with a wire brush and solvent prep.
- Crushed flex runs behind knee walls. Four Corners and Horn Pond capes from the 1950s and 60s often got flex-duct additions during 1990s renovations. Remodelers buried runs with no support, and now they’re flattened or disconnected. Sealing the collar does nothing if the duct itself is collapsed.
- Return-side loading from I-93/I-95 particulate. Homes near the interchange pull tire dust, brake dust, and diesel soot into the return grille. The buildup looks like mold, tests as particulate, and reduces airflow until the blower motor labors. Sealing helps, but the filter upgrade and cabinet cleaning are usually the bigger fix.
- Disconnected trunk sections in triple-deckers. Stack effect and vibration in multi-family housing work joints loose over decades. We find supply trunks dropping 20% of their air into the wall cavity before it reaches the second floor. Camera inspection locates the gap; reconstruction and sealing fix it.
Pricing for Duct Sealing in Woburn, MA
A typical duct sealing job in Woburn runs $450 – $1,200 for residential work. Spot repairs at accessible joints start around $450. Full-system sealing with multiple access cuts, crushed-run reconstruction, and air-handler cabinet gasket work can reach $1,200. Commercial systems or multi-family properties run higher based on access and square footage.
What moves the price: how many seams need attention, whether we need to open walls or ceilings to reach failed joints, whether flex duct needs replacement before sealing, and whether the air handler itself needs cleaning and gasket work. We don’t quote per-vent or per-linear-foot teaser prices that jump at the door. We inspect, write the price down, and that’s the price.
Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Woburn
Our crews work throughout the northern Boston metro, including Woburn and neighboring Winchester, Burlington, Stoneham, and Lexington. Same standards, same written pricing, same 365-Day Done Right Promise in every town.
Serving Woburn, MA - Our Local Coverage Area
We’re based in the Woburn 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 About Duct Sealing in Woburn
It’s usually not mold. In Woburn homes near the I-93/I-95 interchange, that black coating is typically highway particulate mixed with old heating oil residue. Sealing the return duct helps, but the real fix is upgrading the filter to a higher MERV rating, cleaning the air handler cabinet, and sealing any leaks that let unfiltered air bypass the filter. Call (361) 326-5060 and we’ll inspect with a camera to confirm what you’re seeing.
Most original sheet-metal ducts in Woburn’s mill-era homes can be sealed if the metal itself is intact. The challenge is that decades of heating-oil residue prevent new sealant from bonding, so we clean each joint to bare metal first. Replacement is only necessary if the trunk is rusted through or structurally damaged. We give you a written price for both options after inspection.
Cleaning removes debris; sealing fixes leaks. If your Woburn home has rooms that never get warm, high utility bills, or visible gaps at duct joints, you need sealing. If the airflow is strong but the air smells musty or the registers are dirty, you need cleaning first. Many Woburn homes need both, and we price them separately so you choose what fits.
Yes, if the flex duct is intact and properly supported. In Four Corners, we often find 1990s flex runs that have sagged, kinked, or pulled loose from collars after thirty years of seasonal humidity changes. Sealing the collar won’t fix a crushed duct. We inspect with a camera, replace damaged sections with proper support, then seal the connections. Written price before any work starts.
Cold winters make leaky ducts more expensive. When your heating system runs nonstop for months, every cubic foot of heated air lost to the attic or wall cavity is air you paid to heat. Woburn’s heating season is long enough that sealing pays back faster than in milder climates. The work itself is done year-round, but January utility bills usually motivate the call.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Woburn since 2004.