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 East Port Orchard
Duct sealing in East Port Orchard typically runs $450 – $1,200 for a whole-home system, and most jobs are completed in a single visit with the price locked in writing before we start. We’re the Duct Sealing crew at Hollis Air Duct Cleaning, and we’ve spent years working in the single-story ramblers and manufactured homes that fill this stretch of the Kitsap Peninsula. Our scheduling runs through the Seattle office, but our technicians live and work these roads daily. We know where the 1970s flexible duct sags in crawlspaces off Mullenix Road, and we’ve traced leaks through original sheet-metal runs in the neighborhoods near Southworth. If your vents blow weak, your energy bill climbed last winter, or you smell musty air every time the furnace kicks on, call us at (361) 326-5060. We’ll give you a written price and a real plan.
Why Hollis Air Duct Cleaning Is East Port Orchard’s Preferred Duct Sealing Company
We’ve sealed ducts in East Port Orchard homes built in 1962 and homes built in 1989, and the pattern is consistent: original joints, no mastic, and decades of Puget Sound moisture working on the seams. That repetition matters. It means when we open your crawlspace hatch, we’re not guessing what we’ll find.
Our technicians follow The Garrison Code on every East Port Orchard job: arrive inside the quoted window, price in writing before touching anything, complete the work by the book, and leave the site clean. Background-checked and uniformed, every one of them. The 365-Day Done Right Promise covers every seal we apply. If a joint fails or a leak returns within a year, we come back 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 for someone in another state to return your message.
Duct Insulation in East Port Orchard
Duct Insulation in East Port Orchard addresses a specific problem created by this area’s housing stock and climate: unconditioned crawlspaces and attics where metal or flexible ductwork loses heat fast and sweats moisture into the surrounding air. Most East Port Orchard homes were built between 1960 and 1990 with minimal original insulation, and what remains has often compressed, torn, or grown damp from years of high humidity. We remove deteriorated wrap, seal every joint with mastic, then apply new insulation rated for the temperature swings of Puget Sound winters. A typical duct insulation job here runs $600 – $1,400 depending on linear footage and access difficulty.
Condensation Control in Crawlspaces
East Port Orchard’s wet winters push relative humidity above 70% for months. When warm air moves through uninsulated ductwork in a cold crawlspace, condensation forms on the exterior, dripping onto soil and encouraging mold growth. We spec insulation with vapor barriers designed for this exact condition.
Heat Loss at Disconnected Joints
Original fiberglass wrap often fails first at the joints, where two sections of duct meet. We find temperature drops of 15 – 25 degrees at these gaps in East Port Orchard homes, which forces furnaces to run longer and drives up heating bills. Our crews seal first, insulate second, so the fix lasts.
HVAC Duct Sealing in East Port Orchard
HVAC Duct Sealing in East Port Orchard means closing the gaps, cracks, and disconnected joints that pull unconditioned air into your system and push conditioned air into places you don’t live. In this market, the dominant problems are original mastic that dried and flaked away, flexible duct that pulled loose at boots, and sheet-metal seams that were never sealed properly during construction. Many East Port Orchard homes also have return-air pathways that draw musty crawlspace air directly into the furnace. A full-system seal typically costs $450 – $1,200 here, with simpler single-zone repairs starting lower. We use a written scope, not a verbal estimate that shifts once we’re inside.
Pressure Testing Before and After
We run a duct blaster test to measure total leakage in CFM25 before any work begins, then repeat the test after sealing. East Port Orchard homeowners see the numbers change. That’s how we verify the work, not by waving a smoke pencil around and declaring victory.
Mastic vs. Tape for Permanent Seals
Hardware-store foil tape fails within three to five years in damp crawlspaces. We apply water-based duct mastic, rated for the humidity levels common near Sinclair Inlet, and we brush it into every seam and joint. It remains flexible, it doesn’t off-gas, and it outlasts the house’s next roof.
Trusted Brands We Service in East Port Orchard
Our vans carry sealing and insulation materials from Nikro, Honeywell, and Aprilaire, plus filtration components from Abatement Technologies. We don’t order parts from a warehouse three states away and hope they arrive next week. For East Port Orchard jobs, we stock mastic, insulation wrap, and connector collars sized for the 6-inch and 8-inch flexible duct common in local ramblers and manufactured homes. That inventory means most repairs finish in one visit, not two. When we do need a specialty component, our Seattle office coordinates same-day or next-morning pickup. You’re not waiting for a part to cross the Sound on a ferry.
Common Duct Sealing Problems We See in East Port Orchard Homes
- Original flexible duct collapsing in crawlspaces. The wire helix inside 1970s-era flex duct rusts through in East Port Orchard’s damp soil conditions, causing sections to sag and kink. We replace with new flex supported every four feet, or convert to rigid duct where access allows.
- Return-air leaks pulling crawlspace moisture. Many East Port Orchard homes have return plenums with gaps at the floor joist, sucking humid air and occasional rodent droppings into the system. We seal these with sheet-metal patches and mastic, then verify with pressure testing.
- Sheet-metal seams that were never sealed at construction. Builders in the 1960s and 70s often installed ductwork fast and trusted air pressure to hold joints together. Forty years later, those joints have loosened. We disassemble, clean, reseat, and mastic every connection.
- Woodstove fine particulate infiltrating ductwork. East Port Orchard’s reliance on wood heat means fine ash and sawdust circulate through forced-air systems, accelerating wear on seals and coating interior surfaces. We clean before we seal, so mastic bonds to metal, not soot.
Pricing for Duct Sealing in East Port Orchard, WA
A typical whole-home duct sealing in East Port Orchard runs $450 – $1,200. Single-zone repairs or partial sealing start around $280. Duct insulation, when combined with sealing, adds $600 – $1,400 depending on linear footage. What moves the number: how much duct is accessible, whether we need to enter a wet crawlspace, the condition of existing joints, and whether we find disconnected runs that require replacement rather than sealing.
We don’t quote per-vent. We don’t bait with a low teaser and rewrite the invoice at your door. The price is written down before any work starts, and it does not move. Every estimate is free, and every job carries the 365-Day Done Right Promise. Call (361) 326-5060 for an exact quote on your system.
We Also Serve Cities Near East Port Orchard
Our crews work throughout the Puget Sound region. We handle Duct Sealing in East Port Orchard as our local focus, and we also schedule jobs in Seattle, Spokane, Tacoma, and Vancouver. If you’re outside East Port Orchard but within our service radius, the same written pricing and 365-Day Done Right Promise apply. We also offer Air Duct Cleaning in East Port Orchard for systems that need debris removal before sealing, and Dryer Vent Cleaning in East Port Orchard for homeowners addressing fire safety in the same visit.
Serving East Port Orchard, WA - Our Local Coverage Area
We’re based in the East Port Orchard 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 East Port Orchard
Whole-home duct sealing in East Port Orchard typically costs $450 – $1,200, with partial repairs starting near $280. Duct insulation adds $600 – $1,400 depending on footage. Call (361) 326-5060 for a free written estimate on your specific system.
We work across all of East Port Orchard, including the Mullenix Road corridor, the Southworth area, and the residential streets between Sedgwick and Banner. Our technicians know the local crawlspace conditions and housing stock in each of these pockets.
East Port Orchard’s wet winters and high crawlspace humidity accelerate mastic deterioration and flexible duct corrosion, meaning seals fail faster here than in drier inland climates. We recommend inspection every three to five years, or sooner if you notice uneven heating or musty odors.
East Port Orchard pricing aligns with Kitsap County rates and runs slightly below Seattle metro pricing due to shorter travel times from our dispatch point. The main cost driver is crawlspace condition, not geography. We charge the same rate for a 1978 rambler in East Port Orchard as we would for identical work in Port Orchard proper.
Every seal is covered by our 365-Day Done Right Promise. If any sealed joint fails, leaks, or disconnects within one year, Hollis returns and makes it right at no charge, including a free second visit. The terms are written on every invoice, not implied.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving East Port Orchard and the greater Puget Sound region.




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