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 Arlington
Duct sealing in Arlington typically costs $450 – $1,200 for a whole-home seal, and most jobs are scheduled within a few days of your call. If you’re tired of rooms that never heat evenly, dust that keeps coming back, or utility bills that climb every summer, the problem is often leaks in your ductwork, not your HVAC unit itself.
We serve Arlington from our Boston office, and our crews know the local housing stock. We’ve sealed ducts in ranches off Park Avenue, in the subdivisions near Arlington Center, and in the older homes along Massachusetts Avenue. Arlington’s mix of 1960s – 1980s ranch homes with attic flex duct presents a specific set of problems that generic duct sealing doesn’t address. Call us at (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Arlington’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. We operate under The Garrison Standard, which means we arrive inside the quoted window, price the job in writing before we touch anything, and leave the site clean. Our Duct Sealing in Arlington work is backed by the 365-Day Done Right Promise: if the seal fails within a year, we come back and make it right at no charge, including a free second visit.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. We use professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, and our crews carry Guardsman-class insulation for Arlington’s extreme attic conditions. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
We don’t compete on the lowest teaser price. We compete on discipline: show up when we said, price it before we touch it, do it by the book. That’s The Garrison Code.
Duct Sealing Services in Arlington
Duct Sealing Services in Arlington address a problem most homeowners don’t know they have: conditioned air leaking into attics, crawl spaces, and wall cavities before it ever reaches your rooms. In Arlington’s 1960s – 1980s ranch homes, we regularly find original duct runs that were sealed with failing foil tape or nothing at all. Air leaks at every joint and boot into the attic, pulling in insulation fibers and attic allergen load instead of delivering conditioned air. A typical whole-home duct sealing in Arlington runs $450 – $1,200, depending on accessibility and how many runs need attention.
Leak Detection and Pressure Testing
We start every job with a pressure test. Our crew seals the registers and pressurizes the duct system to measure total leakage. If your ducts leak more than 10% of total airflow, you’re heating and cooling your attic. In Arlington’s humid subtropical climate, that also means pulling moisture and mold spores into the system. We show you the number before we quote the fix.
Mastic and Mesh Sealing at Joints and Boots
We seal accessible joints with water-based mastic and fiberglass mesh, not foil tape. Mastic remains flexible, doesn’t dry out, and holds up to Arlington’s attic temperature swings. We apply it to the plenum, trunk lines, and branch connections. Every seal is checked under pressure before we close the access.
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.
Duct Insulation in Arlington
Duct Insulation in Arlington is often the missing piece after sealing. Even sealed ducts lose efficiency if the insulation is compressed, moisture-damaged, or missing entirely. In Arlington, the combination of intense attic heat, often exceeding 140°F in summer, and high humidity causes flex duct inner liners to deteriorate and release fibers into the air supply. A typical duct insulation job in Arlington runs $600 – $1,800 for a full replacement wrap, or $200 – $500 for spot repairs on accessible runs.
Guardsman-Class Wrap for Attic Runs
We wrap new and repaired runs in Guardsman-class insulation with a vapor barrier. This isn’t hardware-store wrap. It’s rated for the temperature extremes Arlington attics see, and it prevents the condensation that leads to mold growth in our humid summers.
Crushed Run Replacement Before Sealing
Insulation can’t fix a crushed or disconnected duct. We replace the damaged section first, then seal and wrap. On a ranch off Park Avenue, our tech ran a camera inspection and found the original attic flex trunk disconnected at the plenum, with a crushed 6-inch run behind it and rodent-nibbled liner shedding fibers into the supply and return ducts. We cut out the failed flex, sealed the plenum and boot connections under negative pressure with HEPA filtration running, then wrapped the new run in Guardsman-class insulation so the Arlington attic heat couldn’t cook it the same way. The homeowner had been vacuuming fiberglass off every register for two summers; after the seal-and-replace, the supply air came through clean.
Trusted Brands We Service in Arlington
We stock parts and materials from Aprilaire, Abatement Technologies, and Guardsman for Arlington customers. That means faster turnaround and no waiting for special orders on standard repairs. Our equipment roster includes Rotobrush rotary brush systems for mechanical cleaning, Nikro negative-air machines for containment during duct work, and filtration products from Honeywell and Aprilaire. When we seal your ducts, we use professional-grade mastic and mesh, not hardware-store tape. The right materials for Arlington’s conditions, installed by crews who know what this climate does to ductwork.
Common Duct Sealing Problems We See in Arlington Homes
- Heat-cooked flex duct liners. Arlington’s 1960s – 1980s ranch homes commonly have flex duct in attics that sees summer temperatures above 140°F, which cooks the inner liner until it sheds fibers into the supply air. Sealing alone won’t hold on that liner; the run often has to be re-joined or replaced before mastic and mesh will stay put.
- Rodent-damaged runs at plenums and boots. Rodent activity in Arlington ranches crushes and disconnects runs at the plenum and boots, leaving gaps that mastic can’t bridge. The run has to be reconnected or replaced before sealing will hold.
- Original foil tape failure. Original 1960s – 80s duct runs were often sealed with failing foil tape or nothing at all, so air leaks at every joint and boot into the attic. We remove the old tape, clean the surface, and apply mastic and mesh for a permanent seal.
- Disconnected trunks pulling in attic air. We regularly find the main trunk line separated from the plenum by several inches, pulling 140°F attic air and insulation fibers directly into the system. This takes more than tape; we rejoin the connection, support the weight properly, then seal and wrap.
Pricing for Duct Sealing in Arlington, MA
Whole-home duct sealing in Arlington typically runs $450 – $1,200. Duct insulation replacement or wrapping adds $600 – $1,800 for a full job, or $200 – $500 for spot work. What moves the price: how many runs need access, whether we’re working in a finished basement or open attic, and whether we find damaged flex that needs replacement before sealing can hold.
We give you one flat price per system, agreed in writing before work starts. No per-vent pricing. No add-ons at the door. We show you before-and-after photos of your own ducts. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Arlington
Our crews work throughout the metro area. We also provide Duct Sealing in Belmont, Winchester, Medford, and Cambridge. Scheduling and dispatch are coordinated from our Boston office, with local crews serving each community.
Serving Arlington, MA - Our Local Coverage Area
We’re based in the Arlington 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 Arlington
It depends on the condition of the inner liner. If the liner is intact, we can seal joints and boots with mastic and mesh. If the liner has been cooked by attic heat above 140°F and is shedding fibers, the run needs replacement before sealing will hold. We determine this with a camera inspection, show you the footage, and quote both options. Call (361) 326-5060 for a free inspection.
1970s Arlington ranches were built with minimal sealing standards, often just foil tape that fails after decades. Newer homes use sealed duct board or properly sealed metal. In older homes, we typically measure 20 – 30% leakage, which means you’re conditioning your attic, not your rooms. The energy loss and allergen pull are both significant. We can quantify this with a pressure test.
We pressurize the system and use a smoke pencil or thermal camera to locate leaks. Plenum leaks show at the furnace connection; run leaks show at joints, boots, or crushed sections. In Arlington’s ranch homes, we find both: disconnected plenums from rodent activity, and crushed runs from storage or pests. We mark every leak, show you the map, and seal in priority order.
Yes, if the dust is coming from deteriorating duct liner or pulled-in attic insulation. Sealing stops the pressure differential that pulls attic air and fibers into the system. If your flex duct liner is shedding, sealing alone won’t stop it; we need to replace the damaged run first. We verify the source with a camera before quoting. Call (361) 326-5060 to schedule an inspection.
We use water-based mastic and fiberglass mesh on all accessible joints, plenum connections, and boots. We do not use foil tape as a primary sealant; it dries and fails. For larger gaps or disconnected sections, we reconnect the ductwork first, then seal and wrap with Guardsman-class insulation. Every seal is pressure-tested before we finish. The price covers all materials and labor; nothing is added at the door.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Arlington and the surrounding communities since 2004.