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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After
Before
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Before
AfterFast, Reliable Duct Sealing Across Lake Tapps
We seal ducts in Lake Tapps homes built for the view, not for easy access. Most properties here sit on steep shoreline lots above the reservoir, with multiple HVAC systems, long trunk lines, and crawlspaces that stay damp year-round. Our Duct Sealing crews are scheduled from our Seattle office and serve Lake Tapps directly, carrying mastic, metal-backed tape, and replacement flex duct sized for the large custom homes that dominate this market. If your upstairs bonus room never reaches temperature or your basement smells musty every fall, the problem is often leakage you cannot see. Call (361) 326-5060. We price by the system, agree on it in writing, and show you photos of every sealed joint before we leave.
Why Hollis Air Duct Cleaning Is Lake Tapps’s Preferred Duct Sealing Company
We’ve worked Lake Tapps long enough to know the pattern: a homeowner calls after their third HVAC company has “sealed the ducts,” yet the bonus room over the garage still won’t heat and the power bill keeps climbing. Usually someone sealed the easy joints near the main air handler and called it done. We don’t work that way.
Our technicians are background-checked, uniformed, and expected to follow The Garrison Code on every Lake Tapps job: arrive inside the quoted window, price in writing before touching equipment, complete the work by the book, and leave the site clean. Every repair carries our 365-Day Done Right Promise. If a seal fails or a repair doesn’t hold, we return 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 schedule.
HVAC Duct Sealing in Lake Tapps
HVAC Duct Sealing in Lake Tapps means finding and closing leaks in the metal trunk lines, flex duct runs, and plenum connections that move conditioned air through homes built for reservoir views, not service access. Most Lake Tapps houses were constructed between the 1980s and 2000s with complex multi-zone systems and long duct runs through steep crawlspaces. When joints separate or mastic cracks, air escapes before it reaches the registers. You’re heating your crawlspace or cooling your attic instead of your living room. Typical HVAC duct sealing in Lake Tapps runs $450 – $1,200 per system, depending on accessibility, the number of joints requiring mastic, and whether damaged flex duct needs replacement.
Camera Inspection Before Sealing
We run a duct camera through the full length of each system before we quote. In Lake Tapps homes, long trunk lines buried under steep shoreline lots often hide separated joints behind insulation that looks intact from the outside. Camera inspection lets us point to the exact leak, show the homeowner the footage, and quote only the work that system actually needs.
Static Pressure Testing After Sealing
Every sealed system gets a post-work static pressure test. We measure before and after, in writing. If the numbers don’t improve, we keep looking until we find the leak we missed. A Lake Tapps homeowner with three systems gets three separate test reports.
Duct Repair in Lake Tapps
Duct Repair in Lake Tapps addresses the damage that sealing alone won’t fix: rotted flex duct, collapsed trunk lines, rusted metal connections, and sections where condensation has destroyed the insulation jacket. The reservoir’s persistent humidity and seasonal drawdown create conditions that standard inland ductwork wasn’t designed for. We replace failed sections with new flex or hard pipe, reconnect with proper supports, then seal the new joints before re-testing. Duct repair in Lake Tapps typically ranges from $280 for a localized flex replacement to $890 for extensive metal trunk repair in a difficult crawlspace.
Condensation-Damaged Flex Replacement
Lakeside humidity soaks flex duct insulation from the outside in. The outer jacket looks fine; the inner liner is moldy and the fiberglass is saturated. We cut out the damaged section, inspect the surrounding trunk for rust, and install new flex with a vapor barrier appropriate for marine-climate crawlspaces.
Multi-System Coordination
When a Lake Tapps home has separate basement, main-floor, and bonus-room systems, we repair and seal each independently. One system may need only joint sealing; another may need fifteen feet of flex replaced. We quote each separately, work through them in order, and document every repair with photos.
Trusted Brands We Service in Lake Tapps
We carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration and sealing products from Honeywell, Aprilaire, and Guardsman. For Lake Tapps homeowners, this means we stock the mastic compounds, metal-backed tapes, and flex duct sizes that large custom homes require, without waiting on a parts run to Tacoma. Our vans carry multiple diameters of flex duct and transition fittings because shoreline homes here often mix 6-inch, 8-inch, and 10-inch runs across three separate systems. When we find a rotted section behind the main-floor air handler off Driftwood Point Road, we replace it that day.
Common Duct Sealing Problems We See in Lake Tapps Homes
- Hidden leaks in long trunk lines. Lake Tapps’s large hillside homes often run ductwork fifty feet or more from air handler to register. A joint behind a bathroom soffit or buried under a steep crawlspace can leak for years without anyone knowing. Camera inspection finds what visual checks miss.
- Condensation destroying seals within a season. The reservoir’s high humidity and seasonal drawdown create moisture levels that standard mastic wasn’t formulated for. We use marine-grade compounds and verify that existing duct insulation is intact before sealing, or the seal will release when the humidity spikes.
- Fir needles and cottonwood fluff clogging intakes. By late May, fresh-air intakes and outdoor condensers on lakeside homes are often packed with Douglas-fir debris. The resulting pressure imbalance forces unfiltered air through every unsealed joint in the system, accelerating dust buildup and forcing the blower to work harder.
- Per-system quoting confusion. A Lake Tapps homeowner with three air handlers calls asking for “the house sealed.” One company quotes a single price, seals only the accessible main-floor joints, and leaves. We quote each system separately, seal each completely, and document each independently.
Pricing for Duct Sealing in Lake Tapps, WA
Most Lake Tapps homeowners pay $450 – $1,200 per HVAC system for complete duct sealing, and $280 – $890 for duct repair work on a single system. A three-system home typically runs $1,350 – $3,600 for full sealing across all units. What moves the price: crawlspace accessibility on steep shoreline lots, the number of joints requiring mastic versus replacement, whether camera inspection reveals hidden leaks behind finished walls, and whether condensation damage requires flex duct replacement before sealing can be effective. We do not quote per vent or per linear foot. We inspect, count the systems, identify the leaks, and give 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 Lake Tapps
Our Duct Sealing in Lake Tapps crews also travel to Seattle, Spokane, Tacoma, and Vancouver for homeowners with large custom homes, multi-system HVAC setups, and ductwork in challenging terrain. Pricing and standards remain identical across our service area.
Serving Lake Tapps, WA - Our Local Coverage Area
We’re based in the Lake Tapps 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 Lake Tapps
Yes, we seal all three in one visit and price each system separately. A typical Lake Tapps home with basement, main-floor, and bonus-room systems runs $1,350 – $3,600 for complete sealing across all units, depending on crawlspace accessibility and the condition of each system’s ductwork. We inspect and quote each system independently because the basement unit may need only joint sealing while the bonus-room system needs flex replacement. Call (361) 326-5060 for a free estimate.
High humidity from the reservoir and seasonal lake-level drawdown create condensation inside ductwork that standard mastic sealants cannot withstand. When moisture soaks flex duct insulation, the sealant releases at joints within months instead of years. We use marine-grade compounds and verify insulation integrity before sealing. Call (361) 326-5060 if your previous sealing didn’t last.
Yes, we regularly work in the steep, forested crawlspaces that are standard for Lake Tapps shoreline homes. We bring low-profile equipment, proper lighting, and replacement materials sized for confined spaces. Camera inspection is especially valuable here because many leaks sit where a technician cannot physically reach to see. Call (361) 326-5060 to discuss access for your specific property.
By late spring, clogged fresh-air intakes and outdoor condensers create pressure imbalances that force unfiltered air through every unsealed joint in your duct system. Sealing without cleaning the intakes first is temporary at best. We clear the debris, then seal, so the system pulls through the filter as designed. Call (361) 326-5060 to schedule both services.
You receive photos of every sealed joint, per system, plus a written summary of measured leakage reduction from static pressure testing before and after our work. For multi-system homes, documentation is organized by air handler location so you know exactly what was done where. This is standard on every Hollis job, not an add-on. Call (361) 326-5060 with questions about our documentation process.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Lake Tapps and the greater Puget Sound region.