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 Everett
Duct sealing in Everett typically runs $800 – $2,400 for a whole-home system, with most single-family jobs falling between $1,200 and $1,800 depending on access and the condition of the original ductwork. We dispatch crews from our Boston office to Everett daily, and we’re familiar with the parking constraints around dense neighborhoods like Bayside and the Glendale section, where narrow streets and shared driveways mean we plan equipment staging before we arrive. If you’re noticing musty air from registers, uneven heating between floors, or energy bills that climb without explanation, unsealed duct seams are often the culprit in Everett’s older housing stock. Call (361) 326-5060 for a free written estimate.
Why Hollis Air Duct Cleaning Is Everett’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our Duct Sealing in Everett work is built on the same standard: show up inside the window, price it in writing before we touch anything, and leave the site clean. Everett homeowners aren’t looking for the lowest teaser quote; they’re looking for a crew that won’t disappear after the invoice is paid. Our 365-Day Done Right Promise covers every duct sealing job in writing, if a seam we sealed fails within a year, we return and make it right at no charge, including a free second visit.
Our technicians are background-checked, uniformed, and accountable. You know who’s walking into your home before they arrive. We answer calls with a live person 24 hours a day, 7 days a week, no voicemail loops, no callback queues. And we use professional-grade equipment from Rotobrush, Abatement Technologies, and Guardsman, the same tools commercial crews use, explained in plain terms on every job.
We know Everett’s housing. The original sheet-metal duct systems in homes built between 1900 and 1950 have riveted seams that were never factory-sealed. In Bayside, we’ve found ductwork that hasn’t been touched in decades, coated with black grime mixed with evergreen pollen and moss spores. That combination doesn’t appear in drier cities, and it changes how we approach the work.
Air Duct Sealing in Everett
Air Duct Sealing in Everett is less about patching a single visible leak and more about systematically gasketing decades-old joints in original riveted sheet-metal duct systems that pull in damp Pacific Northwest air carrying evergreen pollen and moss spores. Everett sits in the heart of the moss belt, where roughly 160 rainy days per year and persistently high humidity create ideal conditions for biological growth inside ductwork. Unsealed seams let that humid outdoor air condense inside the ducts, feeding the mold, mildew, and moss that our technicians routinely find coating supply and return lines in older neighborhoods.
We were called to a 1920s two-story in Bayside where the upstairs registers were blowing musty air and the air handler closet smelled like wet leaves. A camera inspection showed black grime and moss spores along the original riveted supply and return ducts, with visible gaps at the seams and a torn connection near the blower motor. We set up negative pressure with HEPA filtration, used agitation tools to knock loose the biological growth, and sealed the seams and joints with mastic and mesh. The homeowner reported the musty odor gone and better airflow to the second floor within a day.
Sealing Shared Building Systems
In Everett’s denser apartment and condo buildings, we often find that previous work sealed only the visible trunk lines while ignoring shared return chases and dryer vent stacks. That leaves cross-contamination between units, mold and mildew cycling through the system indefinitely. Our crews map the full duct network before sealing anything.
The Air Handler Connection
Sealing duct seams without addressing the air handler and blower motor compartment defeats the purpose. Negative pressure and bypass leaks at the cabinet pull humid outdoor air directly into the supply and return ducts, bypassing all the seam work. We seal the cabinet and plenum connections as part of every job.
Duct Sealing Services in Everett
Duct Sealing Services in Everett require a different playbook than in drier climates because the enemy isn’t just conditioned air escaping, it’s unconditioned, biologically active air getting in. Our Duct Sealing team uses mastic and fiberglass mesh on riveted seams, not tape or cheap caulk, because Everett’s damp, mild winters cause metal expansion and contraction that peels inferior materials within a season. The same seams reopen, and moss spores and evergreen pollen flow back in.
We price every job in writing before work begins. No estimates that balloon once the technician is inside. For a typical single-family home in Everett, whole-system duct sealing runs $1,200 – $1,800. Larger homes or systems with extensive access issues can reach $2,400. Apartment and condo buildings with shared systems require custom quotes based on the number of units and the complexity of the chase network.
Material Selection for Local Conditions
We specify mastic rated for damp environments and reinforced mesh that flexes with thermal cycling. Tape fails here. Caulk cracks. The right material costs more upfront and eliminates the callback.
Post-Sealing Verification
After sealing, we run a pressure test to confirm the system holds. We show the homeowner before-and-after photos of their own ducts, not stock images. You see what we saw, and what we did about it.
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 Everett
We stock parts and materials from Abatement Technologies, Guardsman, and Aprilaire for Everett customers, which means faster turnaround on jobs that need filtration upgrades or specialized sealing compounds. Our equipment roster includes Rotobrush rotary brush systems for agitation cleaning before sealing, and Nikro negative-air machines for containment during the work. When a Bayside or Glendale job calls for HEPA filtration or damp-rated mastic, we don’t wait on a parts run to Boston. The truck arrives stocked. That matters in a city where parking is tight and returning for materials burns an hour you didn’t plan to lose.
Common Duct Sealing Problems We See in Everett Homes
- Tape and caulk failures on riveted seams. Previous contractors used hardware-store tape or all-purpose caulk on original sheet-metal ducts. Everett’s damp winters cause expansion and contraction; the adhesive fails within months, reopening seams that pull in humid air and biological contaminants.
- Ignored shared return chases in multi-unit buildings. Sealing only the visible trunk lines in an Everett apartment or condo leaves cross-contamination pathways active. Mold and mildew cycle between units indefinitely, and no amount of trunk-line sealing fixes it.
- Neglected air handler cabinets. Technicians seal the ducts but skip the blower motor compartment and plenum connections. Negative pressure at the cabinet bypasses all seam work, pulling unfiltered, humid outdoor air directly into the supply stream.
- Biological growth treated as ordinary dust. Everett’s moss-belt climate means ducts often contain living material, not just debris. Sealing over active mold or moss without decontamination first traps moisture and accelerates growth behind the seal.
Pricing for Duct Sealing in Everett, MA
Whole-system duct sealing in Everett typically costs $800 – $2,400. Most single-family homes fall in the $1,200 – $1,800 range. What moves the number: the linear feet of ductwork, access (crawl space vs. basement vs. finished ceiling), whether we need to clean biological growth before sealing, and whether the job includes shared chases in a multi-unit building.
We do not quote per-vent prices. That structure invites bait-and-switch tactics we don’t use. We give one flat price per system, agreed in writing before work starts. The price does not move at the door. Free estimates. Call (361) 326-5060.
We Also Serve Cities Near Everett
Our crews work throughout the metro, including Everett and neighboring Malden, Chelsea, Revere, and Medford. Scheduling and dispatch run from our Boston office, with local crews serving each city. Same standard, same written pricing, same 365-Day Done Right Promise.
Serving Everett, MA - Our Local Coverage Area
We’re based in the Everett 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 Everett
Everett’s location in the moss belt means persistently damp air and dense evergreen canopy create conditions for algae, lichen, and moss to grow inside ductwork far more aggressively than in drier cities. Unsealed seams pull that humid, biologically active air directly into your HVAC system, feeding growth that drier climates simply don’t produce. Call (361) 326-5060 for a free estimate on sealing your system against it.
Yes, and it’s often more critical than in single-family homes because shared return chases and our Dryer Vent Cleaning in Everett stacks allow cross-contamination between units. We map the full duct network, seal all accessible points including common chases, and coordinate with building management to minimize disruption. Call (361) 326-5060 to discuss your building’s specific layout.
Duct sealing stops the infiltration of new humid air that feeds the growth, but active biological material must be removed first. We clean with HEPA-contained negative pressure and agitation tools, then seal the seams to prevent recurrence. The combination is what breaks the cycle in moss-belt conditions. Call (361) 326-5060 for an inspection.
We plan staging before we arrive, especially in Bayside and the Glendale section where narrow streets and shared driveways limit space. Our trucks carry all necessary equipment and materials to complete the job without return trips. We confirm access details when we schedule. Call (361) 326-5060 to arrange a time that works.
Yes. Sealed, properly flowing dryer vent stacks prevent lint accumulation and back-pressure that increase fire risk in multi-unit buildings. We inspect and seal stack connections as part of comprehensive duct sealing in shared-system buildings. Call (361) 326-5060 to include your dryer vent stack in the scope.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Everett since 2004 as part of the Garrison Partners family.