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 Vancouver
Duct sealing in Vancouver, WA typically runs $400 – $900 for a whole-home system and is usually scheduled within a few business days. We seal supply and return joints, plenum connections, and compromised flex runs so your heated and cooled air actually reaches the rooms you pay to condition.
We’ve worked in Vancouver homes long enough to know the local problems by sight. The 1950s – 1980s tract houses in Bagley Downs and North Image with their original galvanized or flex ductwork. The 1920s – 1940s bungalows on the west side with short retrofit runs slapped in decades ago. The newer builds in Fisher’s Landing that still pull fine volcanic ash and glacial silt through return-air systems. Our crews serve Vancouver from our Seattle-area dispatch office, and we know the difference between a mold problem from our wet winters and an ash problem from the Columbia River corridor. Call us at (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Vancouver’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Duct Sealing in Vancouver crew operates under The Garrison Standard: written prices, written guarantees, and a 365-Day Done Right Promise on every job. That means if our seal fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround.
Vancouver homeowners tell us the same thing repeatedly: other companies quoted a low number over the phone, then the invoice jumped once the technician was inside. We don’t work that way. The price is written down before any work starts, and it does not move at the door. Our technicians are background-checked and uniformed, and our phones are answered by a live person 24 hours a day, 7 days a week.
We know Vancouver’s housing stock because we’ve crawled through it. The unsealed galvanized trunks in Bagley Downs ranches. The damp flex runs in east-side crawlspaces that grow black mold colonies after wet winters. The fine gray Mount St. Helens ash still settling in return plenums. This isn’t generic ductwork. It’s Vancouver ductwork, and we treat it accordingly.
Duct Repair in Vancouver
Duct Repair in Vancouver means fixing the physical damage that makes sealing impossible: disconnected joints, crushed flex runs, corroded galvanized sections, and plenums compromised by years of moisture and ash abrasion. We see this most often in the pre-1980 tract homes around Bagley Downs and North Image, where original ductwork has simply reached the end of its service life.
Typical duct repair in Vancouver runs $300 – $700 for section replacement or plenum rebuilding, with whole-system replacement reaching $1,200 – $2,500 when galvanized trunk lines are too far gone to salvage. We always inspect first with a camera so you know exactly what needs fixing before we quote.
Disconnected and Crushed Flex Runs
Flexible duct sags over time, especially in Vancouver’s damp crawlspaces where support straps corrode. A sagging low spot traps condensation, feeds mold, and eventually collapses. We replace the compromised section with properly supported flex or rigid duct, then seal all joints with mastic and mesh.
Corroded Galvanized Trunk Lines
The galvanized steel ducts in Vancouver’s mid-century ranches rust from the inside out, accelerated by decades of humid marine air. Once the metal is perforated, no amount of sealing tape helps. We cut out the damaged section and fabricate a replacement that matches the original dimensions.
Air Duct Sealing in Vancouver
Air Duct Sealing in Vancouver is the process of closing leaks in your supply and return ductwork using professional-grade mastic sealant, fiberglass mesh, and mechanical fasteners where appropriate. In a typical Vancouver home, 20 – 30% of conditioned air escapes through these leaks before reaching your rooms, which means you’re paying to heat your crawlspace or attic.
Whole-home air duct sealing in Vancouver generally costs $400 – $900, with smaller bungalow systems at the lower end and larger homes with complex trunk-and-branch layouts toward the upper end. The price is written before we start, and it covers the complete system, not a per-vent upcharge.
Source Removal Before Sealing
Here’s what separates our Duct Sealing work in Vancouver from a generic job: we don’t seal over contaminants. In a 1968 ranch off Falk Road in Bagley Downs, our tech ran a camera inspection and found black mold colonies coating a sagging flex run above the air handler plus a layer of fine gray ash grit in the return plenum. We pulled negative pressure with HEPA filtration, worked the run with agitation tools to break the mold and ash loose, then sealed the joints and the compromised flex with duct sealant and mesh. The customer’s musty smell dropped off and the blower motor stopped short-cycling on the now-tighter supply and return ducts.
Mastic vs. Tape: What We Use and Why
Duct tape fails. The adhesive degrades in Vancouver’s temperature swings and humidity cycles. We use water-based duct mastic, reinforced with fiberglass mesh at joints and plenum connections. It remains flexible, it bonds to metal and flex surfaces, and it lasts. For high-pressure joints, we add mechanical fasteners so the seal holds under load.
Trusted Brands We Service in Vancouver
We carry filtration and sealing products from Aprilaire, Abatement Technologies, and Guardsman, plus we run Rotobrush rotary brush systems and Nikro negative-air machines for source removal before any sealing work begins. For Vancouver homeowners, this means we don’t need to order parts from out of state and wait a week. We stock the mastics, meshes, and replacement flex appropriate for the duct sizes common in local 1950s – 1980s tract homes. If your system needs a specific filtration upgrade after sealing, we can source Aprilaire media cleaners or Guardsman UV treatments without extended lead times. Our equipment is professional-grade, not hardware-store gear, and we explain what each tool does before we bring it into your home.
Common Duct Sealing Problems We See in Vancouver Homes
- Sealing over wet flex duct in damp-season Vancouver traps moisture and feeds the black mold colonies that already grow inside east-side ranch runs. We see this where previous owners or less careful contractors slapped tape on damp ductwork. The mold keeps growing behind the seal, and the homeowner smells it every time the blower kicks on. We dry, clean, then seal.
- Ignoring residual Mount St. Helens ash and glacial silt in return-air plenums means grit keeps abrading the new sealant and clogging the air handler. That fine gray dust isn’t ordinary household dirt. It’s abrasive volcanic glass and silicate particles that scour metal surfaces and work into every joint. We remove it with HEPA-contained negative air before we seal.
- Sealing only the registers on older bungalow retrofit runs leaves the big leaks at the plenum and trunk joints, so the system still pulls damp crawlspace air. The visible registers are rarely the worst leaks. We pressure-test the entire system and seal from the air handler outward.
- Vancouver’s pre-1980 tract homes in areas like Bagley Downs and North Image often have original unsealed galvanized or flex duct runs that still hold fine gray Mount St. Helens ash and glacial silt in the return-air plenums, so sealing has to start with source removal of that grit before any mastic or tape will hold. This is the job we do differently because we’ve seen what happens when it’s skipped: the sealant fails within two seasons, and the homeowner is back to square one with a lighter wallet.
Pricing for Duct Sealing in Vancouver, WA
Whole-home duct sealing in Vancouver typically costs $400 – $900. Smaller homes with simple trunk-and-branch systems, like the 1940s west-side bungalows with short retrofit runs, fall at the lower end. Larger homes in Fisher’s Landing or east Vancouver with complex layouts, multiple zones, or extensive flex replacement needs run higher. Duct repair, when needed before sealing, adds $300 – $700 for section replacement.
What moves the price: the amount of accessible ductwork versus duct buried in walls, the condition of existing flex or galvanized sections, whether source removal of mold or ash is required before sealing, and whether plenum rebuilding is necessary. We inspect with a camera, write the full price on paper, and get your approval before any work begins. No per-vent pricing, no teaser coupons, no invoice that balloons once the van is in your driveway. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Vancouver
Our crews work throughout Clark County and into neighboring communities. We regularly schedule duct sealing in Ridgefield, Battle Ground, Camas, and Washougal, with the same written pricing and 365-Day Done Right Promise that Vancouver homeowners receive. If you’re in a nearby city and found this page searching for Vancouver duct sealing, we can likely serve your home on the same routing.
Serving Vancouver, WA - Our Local Coverage Area
We’re based in the Vancouver 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 Vancouver
Your ducts smell musty because Vancouver’s wet marine climate creates condensation inside unsealed or poorly ventilated duct runs, especially flexible duct in crawlspaces, and that moisture feeds black mold colonies that release spores when the blower runs. We see this most in east-side ranches where attic and crawlspace ventilation was never adequate. The fix is source removal of the mold with HEPA-contained negative air, drying the duct system, then sealing all joints so humid crawlspace air stops entering. Call (361) 326-5060 for an inspection and written quote.
Yes, but only if the source of that dust is addressed first. That fine gray grit in Vancouver return vents is often residual Mount St. Helens ash and glacial silt from the Columbia River corridor, not ordinary household dust. Sealing alone won’t stop it if the return plenum is still loaded with abrasive particles. We remove the grit with professional rotary brush and negative-air systems, then seal the plenum and trunk connections so new infiltration can’t enter. Call (361) 326-5060 and we’ll inspect your return system with a camera.
Yes, sealing is often especially worthwhile in 1940s Vancouver bungalows because the short retrofit runs installed decades ago were rarely sealed properly at the plenum and trunk joints, meaning you’re losing conditioned air into wall cavities and the crawlspace. These smaller systems also respond dramatically to sealing because there’s less total duct volume to pressurize. We typically see 15 – 25% efficiency improvement in these homes. Call (361) 326-5060 for a camera inspection and written price.
After sealing, we generally recommend MERV 11 – 13 for Vancouver homes, which captures mold spores, fine ash particles, and pollen without overloading residential blower motors. Higher MERV ratings restrict airflow and can cause the short-cycling we just eliminated by sealing your ducts. We match the filter to your system’s capacity and verify static pressure after installation. If you need enhanced filtration for allergy or asthma concerns, we can discuss Aprilaire media cleaners or Guardsman UV systems that work with your sealed ductwork. Call (361) 326-5060 to review options.
We verify every Vancouver duct sealing job with before-and-after pressure testing, and we show you the camera footage of your ducts before and after source removal and sealing. You’ll see the leaks we found, the grit we removed, and the sealed joints. The written invoice lists every plenum, trunk, and branch connection we addressed. If anything fails within 365 days, our Done Right Promise covers a free return visit to make it right. No guessing, no trust-me assertions. Call (361) 326-5060 to schedule.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Vancouver since 2004.