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 Fort Lewis
Duct sealing in Fort Lewis typically runs $450 – $1,200 for a whole-home system, with most jobs completed in a single visit after a written quote. Our crews serve Fort Lewis from our Seattle dispatch office, carrying the tools and materials needed for the base-adjacent rural properties and on-base housing that define this market. Call (361) 326-5060 for a free estimate.
We know Fort Lewis well. We’ve worked the 1920s-era duplexes near the old post, the 1960s ranches off DuPont, and the newer townhomes in Lakewood. Each has its own duct problems: original galvanized steel with corroded seams, flex duct in crawlspaces that’s cracked from Pacific Northwest moisture, or systems pulling dust from gravel driveways and unpaved roads. Our Duct Sealing team doesn’t guess. We inspect with a camera, write the price down, and seal only after source removal is complete.
Why Hollis Air Duct Cleaning Is Fort Lewis’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family. That track record matters in Fort Lewis, where military families need a company that shows up on time, documents the work, and won’t disappear before a move-out inspection dispute is resolved.
Our technicians are background-checked and uniformed. You know who’s arriving before they knock. Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops when you’re trying to schedule around a PCS move.
Every job gets a written price before work starts. The number doesn’t move at the door. Every repair is covered by our 365-Day Done Right Promise: if the work fails within a year, we return and make it right at no charge, including a free second visit.
We understand the Fort Lewis inspection cycle. On-base housing at Joint Base Lewis-McChord often requires HVAC and duct cleanliness verification for move-out checklists. We provide before-and-after photos and written documentation on request.
Duct Sealing Services in Fort Lewis
Duct Sealing Services in Fort Lewis start with finding where your conditioned air is escaping. In this market, that usually means corroded joints in original galvanized ducts, gaps where flex meets rigid pipe in crawlspaces, or seams that have opened from decades of thermal expansion and Pacific Northwest moisture cycling. A typical duct sealing job in Fort Lewis runs $450 – $950 for a single system, depending on duct length, accessibility, and whether we need to remove debris first.
We don’t seal over dirty ducts. That’s a common shortcut here, and it fails. Dust and pollen from unpaved roads and open land around JBLM will stay trapped behind sealant, then re-contaminate your supply air every time the blower cycles. Our process: camera inspection, source removal with rotary brush agitation and negative-air containment, then sealing with mastic or metal-backed tape rated for HVAC use.
Move-Out Inspection Sealing
Military tenants near Fort Lewis often need ducts sealed and documented before a JBLM move-out inspection. We photograph the before condition, complete the work, and provide written verification of duct integrity and cleanliness. The price is fixed before we start.
Rural Property Systems
Properties on gravel roads or with outbuilding duct runs need special attention. We inspect detached garage and shop connections, seal longer flex runs that pull dust back into the main system, and verify that wood-stove return air isn’t drawing combustion byproducts through leaky joints.
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 Fort Lewis
Duct Insulation in Fort Lewis addresses the condensation and energy loss that come with damp, cool crawlspaces. From October through May, unconditioned crawlspaces here stay wet. Bare metal ducts sweat. Insulation gets heavy with moisture, compresses, and quits working. A typical duct insulation job in Fort Lewis runs $600 – $1,200, depending on linear feet and whether we’re replacing water-damaged material.
We use insulation products rated for Pacific Northwest humidity, installed after sealing is complete. Sealing first, insulating second. Reversing that order traps moist air inside the duct cavity, which is how mold starts behind new wrap.
Crawlspace Moisture Barriers
Where crawlspace ducts show chronic condensation, we often recommend combining duct insulation with a vapor-barrier upgrade on the ground itself. This isn’t always necessary, but in Fort Lewis’s long wet season, it can be the difference between insulation that lasts and insulation that sags within two years.
Wood-Heat Return Air Protection
Homes heating with wood stoves need return ducts that don’t pull cold, dusty crawlspace air through leaky seams. Insulated, sealed returns maintain more stable temperatures and don’t compete with the stove’s draft. We’ve seen this specifically in the older ranch stock near DuPont and the rural properties off the old Fort Lewis area.
Trusted Brands We Service in Fort Lewis
Our Fort Lewis crews carry professional-grade equipment from Rotobrush and Nikro: rotary brush systems for mechanical agitation inside ductwork, and negative-air machines that contain debris during cleaning. For filtration and sealing products, we stock Honeywell and Aprilaire media, plus mastic and metal-backed tapes rated for the temperature swings and humidity levels common in Pacific Northwest crawlspaces. We don’t use hardware-store duct tape. It fails. We keep the right materials on the van so Fort Lewis jobs aren’t delayed waiting for parts.
Common Duct Sealing Problems We See in Fort Lewis Homes
- Sealing over joints that were never cleaned first. Dust and pollen from unpaved roads and open land around JBLM stay trapped behind new sealant, then re-contaminate supply and return ducts every time the blower runs. We remove the debris, then we seal.
- Ignoring condensation in unconditioned crawlspaces during the October-through-May wet season. New sealant applied over damp metal traps moisture. Mold and musty odors return within months. We dry, seal, then insulate.
- Skipping outbuilding or detached-garage duct runs on rural properties. A longer, unsealed flex pathway pulls dust and garage fumes back into the main system. We trace the full duct map, including additions and outbuildings.
- Original galvanized ducts with corroded seams in pre-1970s housing. The old Fort Lewis area and nearby DuPont have plenty of these. Corrosion opens gaps that mastic alone won’t bridge. We assess whether spot sealing or section replacement is the honest call.
Pricing for Duct Sealing in Fort Lewis, WA
A typical duct sealing job in Fort Lewis runs $450 – $950 for a single residential system. Duct insulation adds $600 – $1,200 depending on linear footage and crawlspace accessibility. Combined sealing and insulation for a whole home usually falls between $900 – $1,800.
What moves the number: how much duct we can reach without cutting access panels, whether the ducts need cleaning first, and whether we’re working with rigid metal, flex, or a mix. Homes with outbuilding runs or multiple air handlers cost more. We write the price down before touching anything. No per-vent pricing. No coupon that balloons once the van is in your driveway.
Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Fort Lewis
Our Duct Sealing in Fort Lewis crews also work in Seattle, Spokane, Tacoma, and Vancouver. Scheduling is coordinated from our Seattle office, with local technicians dispatched to each market.
Serving Fort Lewis, WA - Our Local Coverage Area
We’re based in the Fort Lewis 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 Fort Lewis
Every 3 – 4 years for rural properties with unpaved-road dust, wood heat, or outbuilding duct runs. That’s more frequent than the typical 5 – 7 year city interval because gravel-driveway dust and pollen load filters and duct surfaces faster. Call (361) 326-5060 and we’ll assess your specific system.
Yes, when combined with source removal and documentation. We provide before-and-after photos and written verification of duct cleanliness and seal integrity that military tenants can submit with their move-out paperwork. The inspection checklist often includes HVAC condition; sealed, clean ducts satisfy that requirement.
Because cleaning without sealing leaves gaps where damp crawlspace air re-enters the system. Fort Lewis’s October-through-May wet season keeps unconditioned crawlspaces humid. We seal first, then insulate, so moist air stays outside the duct envelope. Musty odors usually stop after that two-step correction.
Yes. Wood stoves create strong negative pressure that pulls return air through any leak. We pay special attention to return duct sealing in wood-heated homes, and we verify that combustion air isn’t being drawn through crawlspace gaps. We sealed a 1960s ranch off the old Fort Lewis area near DuPont where the homeowner heated with a wood stove and the return ducts pulled in dust from a gravel driveway. Our tech ran a camera inspection from the air handler through the original galvanized supply and return ducts and found open joints and a cracked flex run in the crawlspace. After source removal with agitation tools under negative pressure and HEPA filtration, we sealed the seams, insulated the crawlspace runs, and the homeowner reported the wood-smoke and musty odor gone on the next burn.
Rotobrush rotary systems, Nikro negative-air machines, Honeywell filtration media, and Aprilaire products. We stock these on our Fort Lewis vans for same-visit completion. Call (361) 326-5060 for specifics on your system.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Fort Lewis since 2004.