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.
Fast, Reliable Duct Sealing Across Hockinson
Homes in Hockinson lose an average of 20-30% of conditioned air through leaky ductwork before it ever reaches the rooms where you live. In our market, a typical whole-home duct sealing job runs $1,200-$2,800 depending on system size and accessibility, and most Hockinson properties need it done once every 10-15 years if the original installation was sloppy or the home has settled. We’re the Hockinson crew that shows up when we said we would, prices it in writing before touching anything, and covers the work under our 365-Day Done Right Promise.
We’ve been driving the rural roads off Northeast 182nd Avenue and 192nd Avenue long enough to know the pattern: custom homes from the 1990s with flex duct sagging in damp crawlspaces, manufactured homes on acreage with rodent-chewed trunk lines, and older ranches near Hockinson Meadows where the original fiberglass duct board is crumbling at every joint. Dispatch and scheduling run through our Seattle office, but our technicians live and work this territory. You won’t get a crew that’s never seen a well-water pressure tank or a septic drain field. Call (361) 326-5060 and we’ll put a real appointment on the calendar.
Why Hollis Air Duct Cleaning Is Hockinson’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning, founded in 2004 as part of the Garrison Partners family, has built its name in Clark County by doing what competitors write into slogans but skip in practice. Our technicians arrive inside the quoted window, in uniform, with background checks you can verify. The price we write down before any work starts is the price you pay. No one at your door renegotiates because they “found more problems than expected.”
Hockinson homeowners specifically mention the rural difference in their feedback. They appreciate that we don’t treat a 2,400-square-foot home on five acres of pasture the same as a Vancouver townhouse. We know to check exterior intakes for fir needles, to look for rodent trails along crawlspace stem walls, and to account for the extra load that heat pumps carry when ducts leak in our cool, wet winters. Our 365-Day Done Right Promise covers every sealing job in writing: if the mastic fails, a joint opens, or your energy bills don’t improve, we come back and make it right at no charge, including a free second visit.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to get on the schedule.
Air Duct Sealing in Hockinson
Air Duct Sealing in Hockinson means closing the gaps, cracks, and disconnected joints in your forced-air system so the heat or cooling you pay for actually arrives in your living spaces instead of dissipating into your crawlspace, attic, or wall cavities. Most Hockinson homes we see were built between 1980 and 2005, an era when duct sealing standards were looser and mastic application was often skipped at the joints. A typical whole-system seal runs $1,200-$2,800 here, with smaller manufactured homes or partial repairs sometimes falling in the $800-$1,500 range.
What We Seal and How
Our crews use professional-grade duct sealing mastic, metal-backed tape rated for temperature cycling, and mechanical fasteners at every joint. We don’t use standard cloth duct tape, which fails within months in our damp Pacific Northwest climate. For inaccessible runs, we pressurize the system and use aerosolized sealant technology that finds leaks from the inside out. Every seam gets documented with before-and-after photos you can review.
When Sealing Beats Replacement
Not every leaky duct needs tearing out. If your trunk lines are structurally sound and the leaks are at joints, boots, or plenum connections, sealing restores efficiency at a fraction of replacement cost. We evaluate each Hockinson system individually and tell you honestly which path makes sense. If replacement is the better call, we’ll say so and explain why.
Duct Sealing Services in Hockinson
Duct Sealing Services in Hockinson cover the full range of forced-air systems found in this rural community, from primary heat pump ductwork to secondary systems serving detached shops and outbuildings. Because many properties here sit on 1-5 acre parcels with multiple structures, we regularly seal main house systems, accessory dwelling unit ducts, and shop heaters that share the same well and septic infrastructure. Pricing scales with system complexity: a single-zone home typically falls in that $1,200-$2,200 band, while multi-structure properties with extended trunk lines can run $2,000-$2,800.
Crawlspace and Attic Work
Hockinson’s rural homes often have ductwork in vented crawlspaces where winter humidity and spring groundwater keep everything damp. Our technicians are equipped for confined-space work and carry the same negative-air equipment and rotary brush systems we use for Air Duct Cleaning in Hockinson. We seal first, then verify with a pressure test so you know the job held.

Outbuilding and Shop Systems
Detached shops with their own furnaces or heat pumps are common along 192nd Avenue and the timbered lots northeast of Hockinson Meadows. These systems get ignored for years, develop severe leaks, and waste fuel all winter. We seal them to the same standard as your main house, with written pricing and the same 365-day coverage.

What happens when you call
- 1
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 Hockinson
Our equipment roster includes Rotobrush rotary brush systems for pre-sealing cleaning, Nikro negative-air machines for containment, and filtration and sealing products from Aprilaire, Abatement Technologies, and Guardsman. We stock mastic, metal tape, and replacement boots for common Hockinson system configurations so most jobs finish in one visit without waiting on parts. For homeowners who also need Dryer Vent Cleaning in Hockinson, we can often bundle the service call and handle both systems while we’re on site. Every product we install carries the manufacturer’s warranty, backed by our own 365-Day Done Right Promise on the labor.
Common Duct Sealing Problems We See in Hockinson Homes
- Crumbled fiberglass duct board at plenum connections. Homes built in the 1970s and early 1980s, common near the original Hockinson town center, used rigid fiberglass duct board that degrades where it meets the air handler. We cut out the damaged section and seal in new connections with mastic and mechanical fasteners.
- Sagging flex duct in damp crawlspaces. The 1990s custom homes along Northeast 182nd Avenue often have flex duct that was strapped too loosely and has sagged into standing water or insulation. The sag creates kinks and tears at the joints. We re-support the runs and seal every connection.
- Rodent damage at exterior intakes and crawlspace penetrations. Rural Hockinson properties surrounded by pasture and Douglas fir timber see more rodent intrusion than city lots. We find chewed holes in return plenums, nesting material blocking airflow, and gaps where ducts pass through stem walls. We seal with rodent-resistant materials and document the repair.
- Disconnected boots in manufactured homes on acreage. Manufactured homes moved onto rural parcels in the 1990s and 2000s often have supply boots that separated from the floor due to settling or poor original support. We reconnect, seal, and reinforce so the boot stays put.
Pricing for Duct Sealing in Hockinson, WA
Here’s what duct sealing actually costs in the Hockinson market, based on the systems we measure and seal:
| System Type | Typical Range |
|---|---|
| Single-zone home, partial seal (joints, boots, plenum) | $800 – $1,500 |
| Single-zone home, whole-system seal | $1,200 – $2,200 |
| Multi-zone or multi-structure property | $2,000 – $2,800 |
| Aerosolized internal sealant (inaccessible ductwork) | $1,800 – $2,800 |
What moves you within these ranges: system size, crawlspace accessibility, whether we need to remove and replace degraded flex duct versus simply sealing intact material, and whether multiple structures are involved. We do not quote per-vent pricing. We do not bait with a low teaser and inflate at the door. One flat price per system, agreed in writing, before any work starts. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Hockinson
Our crews work throughout Clark County and the broader metro area. If you’re outside Hockinson proper, we also handle Duct Sealing calls in Vancouver, Battle Ground, and the rural fringe communities, plus scheduled runs to Seattle, Spokane, and Tacoma for larger commercial or multi-property accounts.
Serving Hockinson, WA - Our Local Coverage Area
We’re based in the Hockinson 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 Hockinson
Duct sealing in Hockinson typically runs $1,200-$2,800 for a whole home, which is comparable to Vancouver pricing but can run slightly higher for multi-acre properties with outbuilding systems or extended trunk lines. The rural access, crawlspace conditions, and extra time to seal shop systems account for the difference. Call (361) 326-5060 for an exact quote on your property.
We schedule Hockinson appointments within a few business days of your call, with dispatch coordinated from our Seattle office and technicians already working Clark County routes. We do not promise same-day dispatch for duct sealing, it’s a scheduled job that requires proper evaluation and material prep, but we do arrive inside the quoted window and call ahead.
Yes. We work the full Hockinson area, from the homes near Hockinson Meadows and along Northeast 182nd Avenue to the timbered acreage off 192nd Avenue and the rural lots toward Brush Prairie. Our trucks carry the equipment for crawlspace, attic, and outbuilding work, and our technicians are trained for the conditions we find on private wells and septic systems.
We do not classify duct sealing as an emergency service, it is a scheduled maintenance and efficiency repair. However, our phones are answered by a live person 24/7, and if a leaking duct has caused a system shutdown or indoor air quality issue that can’t wait, we’ll get you on the next available schedule and advise on immediate steps. For true HVAC emergencies, we recommend contacting your heating and cooling contractor first.
Every duct sealing job is covered by our 365-Day Done Right Promise in writing. If the seal fails, a joint opens, or you’re not seeing the efficiency improvement we projected, Hollis returns and makes it right at no charge, including a free second visit. This applies to all Hockinson properties and is backed by the Garrison Standard, not a verbal assurance.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Hockinson and Clark County since 2004.




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