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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Before
AfterFast, Reliable Duct Sealing Across Galena Park
Duct sealing in Galena Park typically runs $800 – $2,400 for a whole-house system, depending on whether we’re sealing accessible trunk lines or replacing contaminated flex runs after a flood event. Most jobs take one day, and we write the price down before any work starts. If your registers smell musty or your utility bill keeps climbing, leaking ductwork is likely pulling unconditioned air from your crawl space or attic. Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate.
We’ve worked in Galena Park since our Houston office opened dispatch to the area, and we know the housing stock here: post-WWII pier-and-beam homes off Clinton Drive, mid-century slabs near the Ship Channel, and older conversions that went from window units to central air with whatever ductwork fit at the time. That local knowledge matters because duct sealing in Galena Park isn’t the same job it is in Pasadena or Channelview. The refinery flare soot, the Gulf humidity, and the flood history here create failure modes we see nowhere else.
Our crews are background-checked, uniformed, and equipped with Rotobrush rotary systems and Nikro negative-air machines. We arrive inside the quoted window, price in writing, and leave the site clean. That’s The Garrison Standard, and it’s how every Hollis location operates.
Why Hollis Air Duct Cleaning Is Galena Park’s Preferred Duct Sealing Company
Galena Park homeowners call us back because we document what we find. After Hurricane Harvey, we were in this town weekly, photographing contaminated ductwork, recording moisture readings, and writing reports that adjusters accepted. Our Duct Sealing in Galena Park reputation was built on that transparency, not on coupon prices that change at the door.
We don’t estimate over the phone and then surprise you. A Hollis technician inspects your duct system with a camera, identifies every leak point, and gives you a written price before any sealant touches your ducts. If we find standing water or petrochemical silt that makes sealing unsafe, we tell you straight and document it for your insurance. No bait, no switch.
Every repair we complete in Galena Park carries our 365-Day Done Right Promise. If the seal fails, the smell returns, or the airflow drops within a year, we come back and make it right at no charge, including a free second visit. That’s written on every job, not implied.
Phones are answered by a live person 24 hours a day, 7 days a week. Scheduling is coordinated from our Houston office, and crews serve Galena Park locally with the parts and equipment to finish most jobs in one visit.
Duct Insulation in Galena Park
Duct Insulation in Galena Park is often the missing piece after sealing, especially in pier-and-beam homes where flex runs sit exposed under the house and in attics that hit 140 degrees in August. Sealing stops air from leaking out; insulation stops the thermal transfer that makes your HVAC work overtime. In Galena Park’s climate, uninsulated ductwork in a vented crawl space can lose 20 – 30% of conditioned air before it reaches your registers.
A typical duct insulation job in Galena Park runs $1,200 – $2,800, depending on linear footage and whether we’re wrapping existing sealed ducts or replacing water-damaged insulation after a flood. We use professional-grade materials from Abatement Technologies and Guardsman, not the thin wrap sold at hardware stores.
When Insulation Follows Sealing
We always seal before we insulate. Wrapping a leaky duct traps moisture between the metal and the insulation, accelerating corrosion and mold growth. In Galena Park’s humidity, that’s a guarantee of failure. Our techs pressure-test the sealed system, then apply closed-cell or fiberglass insulation with a proper vapor barrier.
Crawl Space and Attic Applications
Homes off Woodward Drive and near Jacinto City frequently have duct runs through unconditioned attics or damp crawl spaces. We insulate the full length, not just the easy spots, and we secure it so it won’t sag into standing water during the next heavy rain.
HVAC Duct Sealing in Galena Park
HVAC Duct Sealing in Galena Park addresses the leaks, gaps, and disconnected joints that waste energy and pull contaminated air into your living space. We use mastic sealant and fiberglass mesh on metal trunk lines, and we replace damaged flex duct rather than taping over it. A typical HVAC duct sealing job in Galena Park costs $800 – $2,000 for a single-story home with accessible ductwork; homes needing extensive flex replacement after flooding can run $2,000 – $4,500.
Our process starts with a visual inspection and pressure test. We identify supply leaks that rob your bedrooms of airflow and return leaks that pull crawl space air, humidity, and whatever contaminants are down there into your HVAC system. Then we seal every joint, seam, and penetration point by hand.
Pressure Testing Before and After
We measure duct leakage with a calibrated fan. A typical unsealed system in Galena Park leaks 25 – 40% of its air. Our target after sealing is under 10%. We show you the numbers before we start and after we finish. No guesswork.
Mastic vs. Foil Tape
Foil tape fails in Galena Park’s humidity. The adhesive degrades, the tape peels, and you’re back to square one within a year. We brush on water-based mastic, which remains flexible and bonds to galvanized steel, flex duct, and sheet metal. On pier-and-beam runs where condensation is constant, mastic outlasts tape by years.
Trusted Brands We Service in Galena Park
Our vans carry sealing and insulation products from Rotobrush, Nikro, Abatement Technologies, and Guardsman. We stock mastic, mesh, flex duct, and insulation sleeves sized for the smaller trunk lines common in Galena Park’s older homes. That local inventory means we don’t leave your job to order parts. Most seals and replacements finish same-day. If your system uses Honeywell or Aprilaire filtration components, we inspect and reinstall them properly after sealing so your airflow isn’t restricted.
Common Duct Sealing Problems We See in Galena Park Homes
- Post-flood contamination trapped by premature sealing. After a Ship Channel flood event or hurricane-driven water intrusion, some homeowners seal ducts that still hold moisture and silt. Six months later, mold blooms and the seal fails. We test with moisture meters and borescope cameras before sealing anything.
- Humidity destroying adhesive seals on exterior runs. Galena Park’s year-round Gulf Coast humidity causes mastic and foil tape to lose adhesion on pier-and-beam flex runs where condensation forms on the duct surface. We use mechanical fasteners and vapor-barrier insulation to protect the seal.
- Pinhole leaks in original galvanized trunk lines. Mid-century homes near Clinton Drive and Woodward often have galvanized ducts with seam corrosion and pinhole leaks invisible from the outside. We inspect the full trunk, not just the visible flex, and seal with mastic and mesh.
- Refinery soot accelerating duct degradation. Galena Park’s Ship Channel-adjacent location means petrochemical particulate coats duct interiors, degrading seals and providing a substrate for mold. We clean before we seal, and we recommend appropriate filtration afterward.
Pricing for Duct Sealing in Galena Park, TX
A standard HVAC duct sealing job in Galena Park runs $800 – $2,000 for a single-story home with accessible ductwork. This covers pressure testing, hand-sealing all accessible joints and seams with mastic, and post-seal verification. Homes needing partial flex duct replacement add $400 – $1,200 depending on linear footage. Full system replacement after flood contamination ranges $2,500 – $5,500, including new trunk lines, insulation, and sealing.
What moves the price: accessibility (crawl space height, attic entry), extent of contamination, whether we’re sealing existing ducts or replacing water-damaged sections, and whether insulation is included. We write every price before work begins. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Galena Park
Our crews work throughout the east Houston metro, including Galena Park, Pasadena, South Houston, Houston, and Channelview. Scheduling is coordinated from our Houston office, and we route technicians to minimize wait times across the service area.
Serving Galena Park, TX - Our Local Coverage Area
We’re based in the Galena Park 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 Galena Park
It depends on what the camera and moisture meter show. If the ductwork is structurally intact and we can verify it’s fully dry with no petrochemical contamination, we clean and seal. If we find standing water, silt, or mold growth inside flex runs, especially in pier-and-beam homes where low spots trap moisture, replacement is the only safe option. We document everything with photos and readings for your adjuster. Call (361) 326-5060 for an inspection.
Gulf Coast humidity keeps duct surfaces damp for months, and Galena Park’s older pier-and-beam homes often have crawl spaces with poor ventilation where that moisture condenses on cool ductwork. Add refinery particulate settling in the neighborhood, and you’ve got a substrate for mold growth that doesn’t need a flood to thrive. Sealing alone won’t fix it if the ducts are contaminated; we clean first, then seal and insulate to prevent recondensation.
Sealing stops your return ducts from pulling contaminated crawl space or attic air into your HVAC system, but it doesn’t filter what’s already in your home. After sealing, we recommend upgrading to a MERV 11 – 13 filter rated for fine particulate, and we verify your filter housing can handle the reduced airflow. Sealing plus proper filtration is the combination that protects indoor air in an industrial-adjacent town.
Most Galena Park homes benefit from MERV 11 after sealing, with MERV 13 for households with respiratory sensitivity or proximity to heavy Ship Channel traffic. Higher isn’t always better; MERV 13 restricts airflow more than MERV 11, and your blower motor must be rated for it. We check your system’s static pressure after sealing and recommend the highest rating your equipment can handle without strain.
We photograph every section of contaminated ductwork with a borescope camera, record moisture content with calibrated meters, and write a detailed report noting the location, extent, and cause of damage. For flood or flare events, we timestamp everything and note any petrochemical odor or residue. Adjusters in this area know our documentation; we’ve been doing it since Hurricane Harvey. The report goes to you and your insurer before any replacement work begins.
We were called to a pier-and-beam home off Clinton Drive after Hurricane Harvey, where the homeowner noticed a musty smell from the registers and soot streaks around the air handler. Our tech ran a camera inspection and found standing water and petrochemical silt in the flex supply run under the house, so we documented the contamination with photos and moisture readings for the adjuster before recommending duct replacement rather than a simple seal-and-clean. After replacing the damaged run, we sealed the remaining galvanized trunk with mastic and mesh, verified airflow with a blower motor check, and the homeowner’s insurer approved the remediation on the documented evidence.
Galena Park’s Ship Channel-adjacent location means duct sealing failures here are as often caused by refinery flare soot and petrochemical particulate coating duct walls as by normal wear, and after a hurricane flood event the town’s pier-and-beam homes often have ductwork that looks dry on the outside but holds contaminated water in low runs. That’s why we never seal without inspecting first, and why our documentation process is built for the reality of this town.
Ready to stop losing conditioned air and start breathing cleaner? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free duct sealing estimate in Galena Park. We’ll inspect your system, write the price down, and show you exactly what we find before any work begins. That’s The Garrison Standard, and it’s how we operate every day.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Galena Park and the greater Houston area since 2004.