Duct Sealing in Normandy Park - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Normandy Park

We’re the crew Hollis Air Duct Cleaning sends to Normandy Park when homeowners notice their HVAC system working harder but heating or cooling less. Our Duct Sealing team covers the full city, from the waterfront homes along Marine View Drive to the wooded properties back toward Three Tree Point, with scheduling coordinated from our Seattle office so we can usually book you within a few days. Call us at (361) 326-5060 for a free written estimate, and we’ll show up in the window we promised, uniformed and background-checked, ready to price the job before any work starts.

Call (361) 326-5060

Why Hollis Air Duct Cleaning Is Normandy Park’s Preferred Duct Sealing Company

We’ve been working in Normandy Park long enough to know the difference between a 1952 ranch on 1st Avenue with original galvanized ductwork and a 1990s custom build off Normandy Road with flex-duct additions that have started to sag. That familiarity matters because the sealing approach for corroded steel is not the same as the approach for disconnected flex runs.

Our technicians follow The Garrison Code on every job: arrive inside the quoted window, price in writing before touching equipment, complete the work by the book, and leave the site clean. The 365-Day Done Right Promise backs every repair in writing. If a seal fails within a year, 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, seven days a week. No voicemail loops, no callback queues, no waiting until Monday morning to schedule.

We also handle Air Duct Cleaning in Normandy Park and Dryer Vent Cleaning in Normandy Park for homeowners who want the full system addressed in one visit.

Duct Sealing Services in Normandy Park

Duct Sealing Services in Normandy Park address the leaks, gaps, and disconnected joints that let heated or cooled air escape before it reaches your rooms. In this city, we see the problem most often in mid-century homes built between the 1940s and 1970s, where decades of marine moisture have corroded metal seams and degraded original mastic. A typical duct sealing job in Normandy Park runs $450 – $950 for a standard single-family home, depending on system size and accessibility. We use professional-grade sealing compounds and mechanical fasteners, not hardware-store tape that will peel within a season.

Leak Detection and Sealing

We pressurize your duct system and measure airflow loss at each register and return, then mark every leak so you can see the problem before we fix it. In Normandy Park’s older homes, we regularly find gaps where galvanized trunk lines meet branch ducts, or where original fiberglass lining has deteriorated and created bypass channels.

Mastic Application and Metal Repair

For corroded steel ducts, we apply UL-181 rated duct sealing mastic, a thick compound that remains flexible as metal expands and contracts. Where salt-laden marine air has eaten through duct walls near exterior soffits, we patch with matching gauge metal before sealing, so the repair lasts past the next wet winter.

Duct Insulation in Normandy Park

Duct Insulation in Normandy Park protects against the energy loss that happens when heated or cooled air travels through unconditioned spaces, particularly in homes with crawl spaces or attics where our mild but damp climate keeps those areas cool and moist year-round. Many Normandy Park homes from the 1960s and 1970s have thin original insulation, or none at all, on ductwork running through ventilated crawl spaces beneath the structure. A typical duct insulation job in Normandy Park runs $600 – $1,400, depending on linear footage and whether existing insulation must be removed first. We use professional-grade materials from Guardsman and Abatement Technologies, sized and secured properly so they don’t compress or sag.

Crawl Space and Attic Wrap

We install foil-faced fiberglass or closed-cell insulation sleeves rated for the temperature range your system operates in, with all seams sealed to prevent condensation from forming on cold duct surfaces. In Normandy Park’s humid environment, this condensation control matters as much as the thermal R-value, because wet insulation breeds mold and collapses into the airway.

Vapor Barrier Integration

Where ducts pass through particularly damp crawl spaces common near the Marine View Drive bluff, we integrate the insulation jacket with the home’s existing ground vapor barrier or recommend upgrades that keep moisture away from both structure and ductwork. This is the difference between insulation that lasts ten years and insulation that fails after two wet seasons.

Trusted Brands We Service in Normandy Park

Our vans carry sealing and insulation materials from Aprilaire, Abatement Technologies, and Guardsman, the same products commercial HVAC contractors specify for hospitals and schools. For Normandy Park homeowners, this means we don’t need to special-order parts and wait a week. We stock mastic compounds, mechanical fasteners, insulation sleeves, and vapor barrier tape sized for residential ductwork, so most jobs complete in one visit. If your system uses Honeywell or Aprilaire filtration components, we can inspect those connections while we’re sealing, since leaky ducts often pull unfiltered air from crawl spaces past the filter cabinet.

Common Duct Sealing Problems We See in Normandy Park Homes

• Corroded galvanized seams from salt-laden marine air. Normandy Park’s position on a bluff above Puget Sound means prevailing winds carry moisture with higher salt content than inland areas, accelerating rust at duct joints and causing pinhole leaks that don’t show until we pressurize the system.
• Disconnected flex-duct runs in additions and renovations. Many homes near Three Tree Point and along the hillside streets have had multiple owners who added flex duct without proper support; the sagging creates gaps at connections and traps condensation in low spots.
• Failed original mastic in mid-century homes. Ductwork installed in the 1950s through 1970s used water-based mastic that becomes brittle after decades of thermal cycling, cracking exactly where Normandy Park’s mild winters and cool summers cause frequent expansion and contraction.
• Moss and organic debris blocking fresh-air intakes. Under the city’s dense cedar and fir canopy, exterior vents accumulate material that restricts airflow and creates negative pressure inside return ducts, pulling attic or crawl space air through every available leak.

Pricing for Duct Sealing in Normandy Park, WA

We Also Serve Cities Near Normandy Park

Our crews work throughout the metro area, including Seattle, Spokane, Tacoma, and Vancouver. Scheduling is coordinated from our Seattle office, with local technicians dispatched to each area.

FAQs About Duct Sealing in Normandy Park