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 Parkwood
Duct sealing in Parkwood typically costs $350 – $850 for a whole-home system, and most jobs are completed in a single visit. If your utility bills have climbed without explanation, or certain rooms stay stubbornly cold while others overheat, you’re probably losing conditioned air through gaps in your ductwork.
We’ve been driving to Parkwood since Hollis Air Duct Cleaning opened in 2004. Our crews know the difference between the original ranch homes off South 240th Street and the newer infill near the Parkwood neighborhood greenbelt. Scheduling runs through our Seattle office, but the technicians who show up at your door live and work in this area. They understand that Parkwood’s damp winters and Douglas fir pollen season don’t just dirty your ducts, they slowly degrade the seals that keep your heated and cooled air moving where it belongs. Call us at (361) 326-5060 for a free written estimate.
Why Hollis Air Duct Cleaning Is Parkwood’s Preferred Duct Sealing Company
Parkwood homeowners call us back because we price in writing before touching anything, and we stand behind the work for a full year. Our 365-Day Done Right Promise means if a seal fails or a connection loosens after we leave, we return and make it right at no charge, including a free second visit.
Our technicians are background-checked, uniformed, and expected to operate under The Garrison Code on every job: arrive inside the quoted window, explain what they found, price it in writing, complete the work by the book, and leave the site clean. No exceptions.
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 morning to schedule.
We know Parkwood’s housing stock. The mid-century tract homes with unlined metal ductwork, the split-levels with crawlspace runs that connect to the main trunk, the newer construction with flex duct that can sag and separate at the collars. That local knowledge means we diagnose faster and fix it right the first time.
Duct Sealing Services in Parkwood
Duct Sealing Services in Parkwood address the hidden leaks that waste energy and degrade air quality in homes throughout this community. Most Parkwood houses lose 20 – 30% of their conditioned air through gaps at joints, disconnected boots, and deteriorated mastic in the crawlspace or attic. We seal these pathways using professional-grade mastic compounds and metal-backed tape rated for temperature cycling, not the hardware-store foil tape that peels off within a season.
A typical whole-home duct sealing job in Parkwood runs $350 – $850, depending on system accessibility and the extent of separation. Homes with original 1950s metal ductwork usually fall at the higher end because the old seams need more extensive remediation.
Leak Detection and Pressure Testing
We start every job with a duct blaster test or calibrated pressure measurement to quantify exactly how much air you’re losing. In Parkwood’s older homes near the greenbelts, we regularly find return ducts pulling musty crawlspace air directly into the living space because the return plenum has separated from the trunk line.
Mastic Sealing and Joint Reinforcement
Our crews apply duct sealing mastic, a thick, fiber-reinforced compound that remains flexible for decades, to every joint, seam, and penetration. In Parkwood’s damp climate, this matters more than in drier regions, moisture degradates lesser materials quickly, and we see the results of cut-rate jobs every month.
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 Parkwood
Duct Insulation in Parkwood protects against the energy loss and condensation problems that plague homes in this damp Pacific Northwest climate. Uninsulated metal ducts running through vented crawlspaces or attics bleed heat in winter and sweat in summer, creating the perfect environment for mold growth and wood rot in your floor joists. We wrap accessible ductwork with formaldehyde-free fiberglass insulation, sealed with a vapor barrier jacket, to maintain air temperature from the furnace or heat pump all the way to the register.
Whole-home duct insulation in Parkwood typically ranges from $500 – $1,200, with costs driven by linear footage, crawlspace clearance, and whether we’re insulating existing sealed ducts or addressing leaks first. Most Parkwood homeowners with original uninsulated metal ductwork see the strongest return on investment.
Condensation Control for Crawlspace Systems
Parkwood’s persistent humidity means cold supply ducts in crawlspaces regularly drip onto the vapor barrier or bare soil below. We insulate to R-8 minimum and ensure the vapor barrier jacket is sealed at every seam, stopping the moisture cycle that damages both your ducts and your home’s structure.
Attic Duct Insulation Upgrades
Attic temperatures in Parkwood can swing from below freezing to over 120°F depending on the season. Uninsulated or poorly insulated attic ducts force your HVAC system to work harder than designed. We remove degraded old wrap, seal any leaks we’ve exposed, and install new insulation with proper vapor sealing.
Trusted Brands We Service in Parkwood
Our crews carry professional-grade equipment and materials from Nikro, Honeywell, and Aprilaire on every Parkwood job. The Nikro negative-air systems and rotary tools we use for duct access and cleaning pair with Honeywell and Aprilaire filtration components when we’re sealing and insulating integrated systems. We stock common duct sealing mastics, collar connectors, and insulation wraps locally, so most Parkwood repairs don’t wait on parts. When we recommend a specific product for your home, we explain exactly what it does and why it fits your system, not someone else’s.
Common Duct Sealing Problems We See in Parkwood Homes
- Original mastic has hardened and cracked. The unlined metal ductwork in Parkwood’s 1950s – 1970s ranch homes was sealed with water-based mastic that becomes brittle after 40 – 60 years. We find powdery, crumbling seams that leak conditioned air into crawlspaces and wall cavities.
- Flex duct has pulled away from boots and collars. Even newer Parkwood homes with flex duct suffer from sagging runs and separated connections, especially in attics where summer heat degrades the plastic ties and tape.
- Return ducts draw in crawlspace air. In Parkwood’s split-levels with crawlspace-connected returns, separated seams pull musty, sometimes rodent-contaminated air directly into the HVAC stream. Our crews regularly find this near the wooded greenbelt areas where Norway rats travel.
- Condensation has rusted metal seams from the outside. Parkwood’s damp maritime climate attacks uninsulated metal ducts year-round. External rust opens new leak paths and weakens the metal itself, requiring sealing plus insulation to stop the cycle.
Pricing for Duct Sealing in Parkwood, WA
Whole-home duct sealing in Parkwood runs $350 – $850. Duct insulation, when done separately, typically costs $500 – $1,200. Most homeowners who need both services together see combined pricing in the $700 – $1,500 range.
What moves you within these ranges: system accessibility (tight crawlspaces take longer), the extent of existing damage, whether we find and repair disconnected sections, and whether insulation removal and replacement is part of the job. We do not quote per-vent or per-linear-foot teaser prices that balloon once we’re inside. One flat price per system, agreed in writing before work starts.
Every estimate is free. Call (361) 326-5060 and we’ll schedule a technician to inspect your ductwork, test for leaks, and give you a written price that doesn’t change.
We Also Serve Cities Near Parkwood
Hollis crews travel throughout the region for Duct Sealing and related work. We regularly serve Parkwood homeowners and also handle jobs in Seattle, Spokane, Tacoma, and Vancouver. If you’re outside Parkwood city limits but in the broader area, call us, we likely cover your location and can confirm when you call.
Serving Parkwood, WA - Our Local Coverage Area
We’re based in the Parkwood 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 Parkwood
Whole-home duct sealing in Parkwood typically costs $350 – $850, and duct insulation runs $500 – $1,200 if done separately. Combined sealing and insulation jobs usually fall between $700 – $1,500. Call (361) 326-5060 for a free written estimate on your specific system.
Low teaser quotes often use per-vent pricing or exclude the crawlspace work that Parkwood’s older homes actually need. We quote one flat price per system after inspection, with no surprises at the door. If a quote seems too low, ask whether it includes pressure testing, mastic sealing of all seams, and warranty coverage.
We pressure-test your system before and after sealing, and we show you the results. Our technicians also photograph accessible work areas so you can see sealed joints and insulated runs. Every job includes a written summary of what was found, what was done, and your 365-Day Done Right Promise documentation.
Properly sealed ductwork using professional mastic should last 20 – 30 years. However, Parkwood’s damp climate and aging housing stock mean we recommend inspection every 5 – 7 years, especially if you have original 1950s – 1970s metal ductwork or have noticed uneven heating, rising bills, or musty odors.
Yes. We also handle Air Duct Cleaning in Parkwood and Dryer Vent Cleaning in Parkwood. Many homeowners schedule duct cleaning before sealing to remove decades of debris, or combine services for a single visit. Call (361) 326-5060 to discuss what makes sense for your home.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Parkwood since 2004.