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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Mukilteo
We seal ducts in Mukilteo homes where the Puget Sound air has already started its work on the metal. Our crews run out of the Seattle office and carry the full Rotobrush and Nikro rig to jobs from the waterfront up to Harbour Pointe and along the Mukilteo Speedway corridor. Most Mukilteo appointments book within a few days, not weeks. Call (361) 326-5060 and you’ll reach a live person who can pull up availability and give you a written price range before we dispatch.
Mukilteo’s housing tells its own story. The mid-century ranches near the ferry terminal, the 1980s tracts tucked behind Olympic View Middle School, the hillside homes above Picnic Point – each carries ductwork shaped by decades of marine moisture. We’ve worked in enough of them to know where the failures hide.
Why Hollis Air Duct Cleaning Is Mukilteo’s Preferred Duct Sealing Company
Hollis has been part of the Garrison Partners family since 2004, and our Mukilteo customers know the difference that track record makes. We’re not chasing the lowest teaser coupon; we’re pricing the job in writing before any tool comes out of the van, then standing behind it for 365 days.
Our technicians arrive uniformed and background-checked, per The Garrison Code. The price we write down is the price you pay. If the seal fails within a year, we come back and make it right at no charge, including a free second visit. That’s the 365-Day Done Right Promise, and it’s on every job.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues. In Mukilteo, where winter humidity stays high and duct problems don’t wait for business hours, that matters.
Air Duct Sealing in Mukilteo
Air Duct Sealing in Mukilteo means closing the gaps where your conditioned air escapes and where unconditioned air gets pulled in. We use mastic compound and foil tape rated for HVAC applications, applied to clean, dry metal or flex duct surfaces. The goal is simple: stop the leaks that waste energy and introduce contaminants.
Most Mukilteo homeowners call us after noticing uneven heating, musty odors when the system runs, or utility bills that climb without explanation. A typical whole-house duct sealing job in Mukilteo runs $850 – $1,800, depending on accessibility, the extent of corrosion damage, and whether we need to replace crushed or disconnected runs rather than simply seal intact joints.
When Sealing Becomes Replacement
Some ducts in Mukilteo are too far gone to seal. Original 1960s flex duct with disintegrated collars, or galvanized metal pitted through from salt air near the waterfront, won’t hold a seal. We flag this during inspection and price the repair before cutting anything.
What the Process Looks Like
We pressurize the system to locate leaks, then access each joint through crawl spaces, attics, or basement runs. Mastic goes on with a brush; foil tape reinforces high-stress joints. The work takes four to eight hours for most Mukilteo homes.
Duct Sealing Services in Mukilteo
Duct Sealing Services in Mukilteo cover more than the obvious gaps. We inspect the full distribution system, from the air handler to each supply and return register, because leaks in one section create pressure imbalances that stress the entire network.
Our Duct Sealing team carries equipment from Nikro for negative-air containment and sources filtration products from Honeywell, Aprilaire, and Abatement Technologies when indoor air quality is part of the problem. A standard sealing service for a Mukilteo home with 10 – 15 runs typically falls in the $850 – $1,400 range. Homes with extensive crawl-space work, corroded waterfront ductwork, or multiple disconnected runs can reach $1,400 – $1,800.
Why Mukilteo Homes Leak Differently
The marine layer here keeps duct surfaces damp for months. Sealant applied wet fails to bond. We dry joints with forced air before application, and we use mastic rated for high-humidity environments. Standard hardware-store tape won’t survive a Mukilteo winter in a crawl space.
The Post-Seal Verification
We test after we seal. Pressure differential measurements confirm the leaks are closed. In homes near Paine Field, where fine particulate load is higher, a tight duct system matters more because every infiltration point draws that material indoors.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Mukilteo
We stock parts and filtration products from Honeywell, Aprilaire, and Abatement Technologies for Mukilteo jobs, which means most repairs don’t wait on shipping. Our Nikro negative-air machines contain dust during access work, and our Rotobrush rotary systems clean before we seal, because sealing over contamination traps the problem inside. For homeowners in Harbour Pointe or along Chennault Beach Road, that local parts availability translates to faster turnaround and fewer return trips.
Common Duct Sealing Problems We See in Mukilteo Homes
- Salt-air corrosion at waterfront joints. Homes near the Mukilteo ferry terminal and along the shoreline get galvanized duct seams that pit and weep. Foil tape lifts within a season on corroded metal. We grind to clean metal and apply mastic for a bond that holds.
- Disintegrated flex duct collars in crawl spaces. The original 1960s flex connections in mid-century ranches have turned brittle from decades of damp. They separate completely, pulling mold spores and crawl-space air straight into supply ducts. We replace the collar and seal with mastic and mechanical fasteners.
- Condensation destroying fresh sealant. Ducts routed through unheated Mukilteo crawl spaces and basements sweat all winter. Sealant applied to a damp surface never cures. We dry the joint, warm the metal if needed, and use products formulated for wet-application tolerance.
- Crushed runs behind knee walls. The compact framing in mid-century ranches often squeezes flex duct at turns. Air pressure collapses the weakened material over time. We reroute or replace the run, then seal the new connection properly.
Pricing for Duct Sealing in Mukilteo, WA
Whole-house duct sealing in Mukilteo typically runs $850 – $1,800. Most homes fall in the $1,000 – $1,400 band. What pushes a job toward the higher end: extensive crawl-space access, multiple disconnected runs requiring reconnection, corroded metal needing section replacement, or homes larger than 3,000 square feet with complex duct layouts.
We don’t price per vent or per linear foot. We price per system, agreed in writing before work starts. That number doesn’t move at the door. Every estimate is free, and we explain what we found before you decide. Call (361) 326-5060 for an exact quote on your Mukilteo home.
We Also Serve Cities Near Mukilteo
Our crews work throughout south Snohomish County, including Mill Creek, Everett, Lynnwood, and Edmonds. Scheduling runs from our Seattle office, with local dispatch to each area. If you’re in one of these neighboring communities and found this page, the same pricing structure and 365-Day Done Right Promise apply.
Serving Mukilteo, WA - Our Local Coverage Area
We’re based in the Mukilteo 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 Mukilteo
Mukilteo’s wet marine climate keeps crawl spaces and basements humid year-round, and any duct leak pulls that damp air into your supply system. The musty odor is mold and mildew growing on dust inside the duct, fed by continuous moisture. Sealing the leaks stops the moisture source, and we clean contaminated sections before we seal. Call (361) 326-5060 for a free inspection.
Yes. The salt-laden air near the waterfront corrodes galvanized metal duct seams and flex duct collars faster than inland Snohomish County homes. We often find pitting and metal fatigue rather than simple loose joints, which requires more extensive surface prep and sometimes section replacement before sealing. If you’re in the 98275 zip near the terminal, mention it when you call and we’ll plan extra inspection time.
Uneven temperatures between rooms, sudden spikes in your heating bill, or debris blowing from registers are common signs. Many Mukilteo ranches built in the 1950s – 60s have original flex duct collars that have simply disintegrated in crawl-space damp. We verify with camera inspection before quoting any work. The estimate is free.
We clean first, then seal. Sealing over active mold traps the contamination and can worsen air quality. Our process includes HEPA filtration cleanup and, if needed, antimicrobial treatment from Abatement Technologies products before we apply mastic. The 365-Day Done Right Promise covers the seal; if moisture returns because we missed a leak, we come back at no charge.
Aviation exhaust and industrial fine particulate from the Boeing plant and Paine Field operations add to the dust load in local homes. Leaky return ducts pull this material from attics and crawl spaces, while leaky supply ducts waste the filtered air you’re paying to condition. A sealed system keeps the particulate out and the conditioned air in. Call (361) 326-5060 to schedule pressure testing.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Mukilteo under The Garrison Standard since 2004.