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 Quincy
Duct sealing in Quincy typically costs $800 – $2,400 for a whole-home system, depending on accessibility and whether we’re working with original galvanized steel or modern flex duct. Our crews are dispatched from our Boston office and are usually on-site in Quincy within 24 – 48 hours of your call for duct sealing or Quincy Dryer Vent Cleaning. We’ve been sealing ducts in Wollaston, Quincy Point, and North Quincy long enough to know that a two-decker on Hancock Street presents a different job than a split-level near Furnace Brook Parkway. Call (361) 326-5060 for a free estimate.
Quincy’s housing stock is old, dense, and built for a different era of heating. The same gravity furnaces and riveted galvanized trunks that moved coal-warmed air in the 1930s are still running in hundreds of homes, and their joints were never meant to be accessed for modern sealing. We know where to cut, how to reseal, and when to stop and document damage for your insurer instead.
Why Hollis Air Duct Cleaning Is Quincy’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our Quincy customers know the difference between a crew that quotes low and vanishes and one that puts the price in writing before touching anything. Our Duct Sealing team follows The Garrison Standard on every job: arrive inside the window, price it before we start, finish by the book, leave the site clean.
Our technicians are background-checked and uniformed, and you’ll know who’s arriving before they knock. Phones are answered by a live person 24 hours a day, seven days a week. No voicemail loops, no callback queues, no waiting until Monday morning to schedule.
The 365-Day Done Right Promise covers every duct sealing job we do in Quincy. If the seal fails, the mold returns, or a joint we sealed opens up within a year, we come back and make it right at no charge. That’s not a handshake deal. It’s written on every invoice.
We serve Quincy from our Boston dispatch office, which means we’re familiar with the local permit environment, the quirks of Norfolk County inspections, and the specific challenges of post-storm work that insurance adjusters in this market expect to see documented.
Air Duct Sealing in Quincy
Air Duct Sealing in Quincy means closing the gaps, seams, and access cuts in your forced-air or gravity-furnace system so heated and cooled air reaches the rooms it was meant for instead of leaking into your basement, walls, or attic. In a typical Quincy home, we find 20 – 35% conditioned air loss through duct leaks before we start. After proper sealing with mastic and mechanical fasteners, that drops below 5%. A full-system seal in Quincy’s market runs $800 – $2,400, with most two- and three-decker homes falling in the $1,200 – $1,800 range.
When Sealing Makes Sense
Sealing is the right call when your ducts are structurally sound but leaking at joints, seams, or old access cuts. In Quincy’s post-war capes and ranches, that’s often the case. In the pre-1950 stock around Wollaston and Quincy Point, we first verify the galvanized steel hasn’t corroded through from decades of humid basement air.
When We Document Instead
After a nor’easter floods your basement, some duct runs can be dried and sealed. Others are too far gone. We don’t guess. We run a camera, take moisture readings, and photograph every run so you and your insurer know exactly what was saved and what was replaced.
Duct Sealing Services in Quincy
Duct Sealing Services in Quincy cover everything from spot-sealing a single disconnected flex run to full-system mastic sealing of original galvanized trunk-and-branch systems. Most Quincy jobs fall between those extremes: cutting access panels into 1920s-era ductwork, sealing the joints, then resealing the panels with gasketed covers so the system can be serviced again. Because Quincy’s older homes often lack modern access points, this cutting and resealing is standard, not extra.
Post-Flood Assessment and Sealing
After water intrusion, we run a full camera inspection before any sealant touches the duct. Standing water inside a return trunk means we dry first, treat for mold if needed, then seal. Sealing over moisture traps it, and mold returns within the season. We document every step for your insurer.
Asbestos-Aware Sealing
Many Quincy homes, especially pre-1970 properties near the Fore River Shipyard, have asbestos tape at duct joints. We manage this material; we don’t tear it. Disturbing it without proper containment fails inspection and can void an insurance claim. Our crews know the difference between sealing around intact tape and cutting into friable material.
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 Quincy
Our equipment roster includes Nikro negative-air machines for containment during cutting and sealing, plus Honeywell and Aprilaire filtration products we install when sealing reveals your system needs better particle control. We stock sealing mastics, gasketed access panels, and mechanical fasteners sized for Quincy’s mix of old galvanized and newer flex duct, which means most jobs are completed in one visit without waiting on parts. For post-flood work, our Abatement Technologies HEPA filtration runs parallel to the sealing process so we’re not blowing mold spores through your house while we work.
Common Duct Sealing Problems We See in Quincy Homes
- Sealing over flooded runs that still hold moisture. After a nor’easter pushes water into a Wollaston basement, some homeowners want the ducts sealed fast so heat returns. We dry first. Sealing damp galvanized steel traps moisture against the metal, and mold blooms inside the trunk within weeks.
- Asbestos tape at joints near the Fore River Shipyard. Pre-1970 homes in this area often have original asbestos wrapping on duct joints. Taping or coating over it without proper management fails inspection and can void your insurance claim. We identify it, document it, and work around it safely.
- Cutting access panels without re-balancing the system. In 1920s gravity-furnace homes, the ductwork was sized for natural convection, not forced air. Cut a panel, seal the leaks, but fail to rebalance supply and return, and the back bedroom on the third floor goes cold while the first floor overheats.
- Internal corrosion in riveted galvanized trunks. Quincy’s humid Atlantic air and decades of basement flooding have eaten the interior of many original ducts from the inside out. The outside looks intact. The inside is flaking rust. We camera every system before we quote sealing.
Pricing for Duct Sealing in Quincy, MA
A typical whole-home duct sealing in Quincy runs $800 – $2,400. Most two- and three-decker homes in Wollaston or Quincy Point fall in the $1,200 – $1,800 range. What moves the price: how many access panels we need to cut and reseal, whether we’re working around asbestos tape that requires additional containment, and whether post-flood drying and mold treatment precede the sealing work.
We give one flat price per system, agreed in writing before any work starts. No per-vent pricing. No add-ons at the door. You’ll see the number on paper before we pick up a tool. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Quincy
Our crews work throughout the South Shore, including Duct Sealing in Quincy and neighboring Milton, Hingham, Hull, and Holbrook. The same written pricing, background-checked technicians, and 365-Day Done Right Promise apply in every town we serve.
Serving Quincy, MA - Our Local Coverage Area
We’re based in the Quincy 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 Quincy
Sometimes they can be dried and sealed; sometimes they must be replaced. We run a camera inspection, take moisture readings, and photograph every run. If the galvanized steel is corroded through or mold has penetrated the seams, we document that for your insurer and recommend replacement. If the water was caught early and the metal is sound, we dry under negative pressure with HEPA filtration, then seal. Call (361) 326-5060 for an assessment.
Yes, if the tape is intact and non-friable. We manage it in place rather than disturbing it, sealing adjacent joints with mastic and mechanical fasteners. If the tape is damaged or airborne, we stop and recommend proper abatement before proceeding. Tearing into it without containment fails inspection and can void your insurance claim. Call (361) 326-5060 and we’ll inspect first.
We deliver a photo set and moisture log that shows, run by run, what was dried, what was sealed, and what was condemned. After a nor’easter flooded a Wollaston basement, our crew documented standing water in a 1920s return trunk, pulled the saturated run under negative pressure, resealed the sound ductwork, and flagged one branch for replacement. The insurer accepted the documentation because it was specific, dated, and showed the decision path. We do this on every post-flood job in Quincy. Call (361) 326-5060 for an estimate.
Quincy’s pre-1950 housing stock used riveted galvanized steel ductwork, not the aluminum or flex duct common after 1970. That galvanized steel is prone to internal corrosion from decades of humid Atlantic air, especially in basements and crawl spaces that flood during nor’easters. The joints were sealed with asbestos tape that degrades, and without modern access panels, moisture sits inside the trunk instead of being detected early. Call (361) 326-5060 and we’ll camera your system to see what you’re working with.
Yes, if the allergens are entering through leaks in your return ducts. In Quincy’s older homes, return trunks often run through unfinished basements, pulling in mold spores, dust, and rodent debris through gaps in the metal. Sealing those returns with mastic stops that infiltration. Sealing supply ducts won’t directly reduce allergens, but it will push more of your filtered air to the rooms that need it. We test both sides of your system and tell you which leaks matter for air quality. Call (361) 326-5060 for an exact quote.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Quincy since 2004.