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 Marysville
Duct sealing in Marysville typically runs $1,200 – $2,800 for a whole-home system, and most jobs are scheduled within a week of your call. Our crews are already working Marysville neighborhoods from Sunnyside to Kellogg Marsh, so we know the local housing stock and the specific problems this marine climate creates in duct runs.
We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and we’ve been sending uniformed, background-checked technicians to Marysville homes since 2004. Dispatch and scheduling are coordinated from our Seattle office, but the crew that arrives at your door lives and works in this area. They know what cottonwood fluff mixed with sawmill dust does to a return duct in June, and they know why sealing tape fails on damp galvanized metal near the waterfront. Call (361) 326-5060 for a free written estimate before any work starts.
Why Hollis Air Duct Cleaning Is Marysville’s Preferred Duct Sealing Company
Our reputation in Marysville is built on showing up inside the window and pricing the job in writing before we touch anything. That discipline matters here because too many homeowners have watched a low teaser quote double once the technician is inside the crawlspace.
We answer our phones with a live person, 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule.
Every repair we make is backed by our 365-Day Done Right Promise in writing. If the seal fails within a year, we come back and make it right at no charge, including a free second visit. That guarantee is rare in this trade, and we put it on paper on every Marysville job.
Our technicians follow The Garrison Code on every site: arrive squared away, explain what you’re paying for in plain terms, leave the space clean. You’ll know who’s walking into your home before they arrive.
Duct Sealing Services in Marysville
Duct Sealing Services in Marysville address a problem most homeowners don’t know they have until their energy bill spikes or a room stays cold no matter how high they run the furnace. The job involves finding every leak, gap, and disconnected joint in your duct network, then sealing them with mastic compound and reinforced tape rated for your system’s temperature and pressure. In Marysville’s climate, this work has to account for moisture inside the duct wall, not just surface dust, because sealing over damp galvanized metal or mold-affected plastic core is a repair that fails within a season.
A typical whole-home duct sealing in Marysville runs $1,200 – $2,800 depending on system size, duct material, and how accessible the runs are. Homes with crawlspace ductwork, which is common in Marysville’s slab-on-grade and raised-foundation construction, usually fall at the higher end because the technician is working in tight, damp conditions.
Leak Detection and Static Pressure Testing
We pressurize your duct system and measure airflow loss at the air handler and each register. In Marysville, we often find that 20 – 30% of conditioned air is escaping into crawlspaces or attics before it reaches the rooms you’re paying to heat. That number is usually higher in 1990s tract homes with flexible plastic-core ductwork, which sags and separates at the collars over time.
Mastic Sealing of Joints and Boots
We apply duct sealing mastic, a thick, flexible compound that bonds to metal, plastic, and fiberglass, at every joint, seam, and boot connection. Unlike foil tape alone, mastic remains flexible through temperature swings and won’t let go when the duct surface is slightly damp, which matters in Marysville’s humid crawlspaces.
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 Marysville
Duct Insulation in Marysville is often the companion job to sealing, because uninsulated or poorly insulated ducts lose heat through the wall of the duct itself, even when the joints are tight. In this climate, condensation on cold duct surfaces in summer and heat loss in winter both drive up energy bills and create conditions for mold growth inside the run. The work involves wrapping sealed ducts with foil-faced fiberglass insulation, typically R-6 or R-8 depending on whether the runs pass through conditioned or unconditioned space.
Duct insulation in Marysville typically adds $800 – $1,800 to a sealing job, or $1,500 – $3,200 as a standalone service for accessible crawlspace runs. Homes near the waterfront with original galvanized metal ducts often need both services together, because the corroded metal has lost its thermal integrity and is sweating into the surrounding insulation.
Condensation Control in Crawlspace Runs
We see this problem constantly in Marysville: cold air moving through uninsulated metal ducts in a warm, humid crawlspace causes condensation that drips onto the vapor barrier below. Proper insulation with a sealed vapor barrier facing stops the sweating and protects the structural components beneath your home.
Insulation Replacement After Water Damage
When existing duct insulation has been saturated by crawlspace moisture or past leaks, we remove the damaged material, inspect the duct beneath for corrosion or mold, then reinstall fresh insulation after sealing. This is common in older mill-town bungalows near Marysville’s waterfront where decades of marine air have degraded the original wrapping.
Trusted Brands We Service in Marysville
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation inside duct walls, Nikro negative-air machines that maintain suction during source removal, and filtration and sealing products from Abatement Technologies and Guardsman. We stock mastic, reinforced tape, and insulation materials sized for the duct types common in Marysville, from flexible plastic-core in 1990s tract homes to rigid galvanized in older construction. That local parts inventory means we don’t leave your job to order materials, and most Marysville homes are completed in a single scheduled visit.
Common Duct Sealing Problems We See in Marysville Homes
- Sealing over damp galvanized metal near the waterfront. The marine air keeps crawlspace ducts sweating year-round, and mastic or tape laid on a wet surface lets go within a season. We dry the run, treat any corrosion, then seal.
- Flexible duct sagging at low points in 1990s tract homes. Marysville’s plastic-core ductwork collects dust and moisture where it dips, creating a breach in both airflow and seal integrity. We support the sag and seal the collar joints.
- Resinous sawmill and smokehouse soot treated as ordinary dust. Standard residential cleaning doesn’t touch this sticky layer. We use heavy-duty degreasing and HEPA filtration before sealing, or the sealant traps active microbial food underneath.
- Fogging “sanitiser” sold as a substitute for source removal. The fog does nothing about the cottonwood-fluff-and-sawdust mat clogging returns in Sunnyside and Kellogg Marsh. Your ducts stay loaded, and the seal fails because the surface was never clean.
Pricing for Duct Sealing in Marysville, WA
Whole-home duct sealing in Marysville runs $1,200 – $2,800. Duct insulation adds $800 – $1,800 when combined with sealing, or $1,500 – $3,200 standalone. What moves you within those ranges: system size (number of registers and returns), duct material and accessibility, whether we need to remove degraded insulation first, and how many repairs are needed beyond sealing (corroded sections, disconnected boots, sagging supports).
We give you 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, you’ll know what’s included, and it does not move. Call (361) 326-5060 for a free written estimate.
We Also Serve Cities Near Marysville
Our crews work throughout Snohomish County, including Duct Sealing in Marysville proper plus Lake Stevens, Everett, Arlington, and Granite Falls. If you’re in one of these communities and dealing with the same damp-crawlspace, coastal-humidity duct problems, we cover those areas on the same schedule and with the same written pricing guarantee.
Serving Marysville, WA - Our Local Coverage Area
We’re based in the Marysville 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 Marysville
Whole-home duct sealing in Marysville typically costs $1,200 – $2,800, with most residential jobs falling between $1,600 and $2,200. The price depends on system size, duct accessibility, and whether we need to remove water-damaged insulation or repair corroded sections first. Call (361) 326-5060 for a free written estimate that won’t change at the door.
Low quotes often skip critical steps: they don’t clean the duct interior before sealing, they use tape alone instead of mastic, or they ignore moisture inside the run. In Marysville’s humid crawlspaces, that shortcut means the seal fails within months. We price for source removal, proper drying, and mastic application that holds through the wet season.
We test static pressure before and after the work, show you the numbers, and provide before-and-after photos of the sealed joints. In Marysville, we also check that crawlspace runs hold their seal through at least one humidity cycle, because tape on damp metal looks fine day one and fails by fall.
MERV 11 is the practical ceiling for most residential systems in Marysville, and it’s what we recommend given the local particulate load. Higher ratings restrict airflow in older furnaces, and MERV 11 captures cottonwood fluff, sawmill dust, and the pollen load this area sees each spring without overworking the blower. Change it every 60 – 90 days during peak season.
Yes. Every duct sealing job in Marysville is covered in writing for a full year. If the seal fails, if a joint separates, or if you lose the static pressure improvement we documented, we return and make it right at no charge, including a free second visit. That promise is on paper before we start, not offered verbally after the fact.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Marysville since 2004.