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 Galveston
Duct sealing in Galveston typically runs $400 – $900 for a whole-home system, with most jobs completed in a single visit after a written estimate. We’re the Galveston crew from Hollis Air Duct Cleaning, and we’ve sealed ducts in raised Victorians on Broadway, post-Ike rebuilds near the seawall, and 1960s bungalows in Pelican Island. Our technicians arrive uniformed and background-checked, price in writing before touching anything, and back every seal with our 365-Day Done Right Promise. Call (361) 326-5060 for a free estimate – we dispatch from our Dallas-Fort Worth office and coordinate crews locally.
Why Hollis Air Duct Cleaning Is Galveston’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Duct Sealing team knows Galveston’s housing stock better than out-of-town outfits that treat every job the same. Homeowners in the East End Historic District, Offats Bayou, and Jamaica Beach call us because we understand what salt air and storm history do to ductwork – not just the theory, but the actual rust scaling and mold colonies we’ve pulled out of galvanized trunks.
Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues. Technicians arrive inside the quoted window, explain what they found with camera inspection footage, and leave the site clean. The Garrison Standard requires it. Every job gets a written price before work starts and the 365-Day Done Right Promise in writing – if the seal fails or the mold returns, we come back at no charge, including a free second visit.
HVAC Duct Sealing in Galveston
HVAC Duct Sealing in Galveston is often a corrosion and mold-remediation job first, driven by salt-laden air and historic housing stock, not just an energy-efficiency upgrade. We seal supply and return duct joints using mastic and foil tape to NADCA standards, but first we inspect for the rust flakes, salt scaling, and mold colonies that Galveston’s 70%+ year-round humidity breeds inside ductwork. A typical whole-home HVAC duct sealing job in Galveston runs $400 – $700 for accessible ductwork in a slab-on-grade or raised-pier home with standard flex or sheet-metal runs. Homes with extensive galvanized steel trunk lines in the East End Historic District, or crawlspace systems requiring full corrosion assessment and EPA-registered disinfectant treatment, can reach $800 – $900.
When Sealing Becomes a Mold Service
In Galveston’s subtropical climate, condensation forms inside ducts every summer. Salt spray accelerates corrosion. Sealing over mold or rust without source removal traps spores and moisture against the metal. We disinfect to FEMA flood-repair protocols before sealing – a step inland Texas crews rarely need.
Post-Ike Flex Duct Assessment
Flex duct installed after Hurricane Ike in 2008 is now 15 – 17 years old. We find it crushed at joist bays, sagging from moisture, or disconnected at the air handler. Mastic won’t adhere to waterlogged flex. We replace compromised sections with new insulated flex, then seal the joints properly.
Duct Repair in Galveston
Duct Repair in Galveston addresses the physical damage that sealing alone cannot fix: crushed flex runs, disconnected collars, rusted-out galvanized sections, and rodent-chewed insulation in crawlspaces beneath raised homes. We reconnect separated ducts, replace damaged sections with matching materials, and seal all joints to NADCA standards. A typical duct repair in Galveston ranges from $250 for a single disconnected run or small section replacement to $600 – $900 for multiple crushed flex lines, corroded galvanized trunk repairs, or crawlspace work requiring full access and moisture remediation.
Rusted Galvanized Replacement
Original galvanized steel ducts in pre-1900 East End homes often show internal rust scaling from salt-laden condensation and storm-surge history. We cut out corroded sections, fabricate replacements from galvanized sheet metal, and seal with mastic rated for high-humidity environments.
Crawlspace Disconnection Fixes
Raised homes on piers – common from the East End to Offats Bayou – have supply and return ducts running through open crawlspaces. We find disconnections where flex has pulled from collars, or where original metal has corroded through at hangers. We reconnect, support properly, and seal against rodent re-entry.
Trusted Brands We Service in Galveston
We stock parts and use equipment from Aprilaire, Abatement Technologies, and Guardsman – filtration and duct-accessory brands that hold up in Galveston’s salt-air environment. Our rotary brush systems from Rotobrush clean to source removal before we seal, and our negative-air machines from Nikro contain debris during the process. For Galveston homeowners, this means faster turnaround: we don’t wait for parts to ship from Houston or Dallas. A crushed flex run or corroded collar gets replaced with material rated for coastal humidity, not hardware-store tape that fails within a season.
Common Duct Sealing Problems We See in Galveston Homes
- Rust-scaled galvanized ducts in pre-1900 East End homes. The 1900 Hurricane and 2008 Ike left salt residue inside original metal ductwork. Sealing over this without cleaning to source removal traps active corrosion and mold spores against the metal, accelerating failure from the inside.
- Crushed post-Ike flex duct at joist bays. Flex installed during 2008 repairs has sagged or been compressed by subsequent work. Mastic and tape cannot restore airflow through a collapsed run; the section must be replaced and properly supported before sealing.
- Disconnected supply and return lines in raised-home crawlspaces. Salt-laden humidity corrodes hangers and collars. We find flex dangling below the subfloor, blowing conditioned air into the crawlspace. Reconnection and sealing without addressing moisture source leads to adhesive failure within one summer.
- Mold regrowth from sealing over untreated colonies. Galveston’s relentless humidity means even minor condensation supports mold. We apply EPA-registered disinfectant before sealing, document the treatment for insurance records, and verify humidity reduction post-job.
Pricing for Duct Sealing in Galveston, TX
A typical whole-home duct sealing in Galveston runs $400 – $700 for accessible systems with standard flex or sheet-metal ductwork. Historic homes with extensive galvanized steel trunk lines, or raised-pier properties requiring crawlspace access and corrosion remediation, range $800 – $900. Duct repair – replacing crushed flex, reconnecting separated runs, or fabricating galvanized sections – adds $250 – $600 depending on material and labor.
What moves the price: accessibility (crawlspace vs. attic), extent of corrosion or mold requiring pre-treatment, and whether post-Ike flex needs replacement before sealing. We give one flat price per system, agreed in writing before any work starts. No per-vent pricing, no add-ons at the door. Estimates are free. Call (361) 326-5060.
We Also Serve Cities Near Galveston
Our crews work throughout the Galveston Bay area, including Duct Sealing in Galveston and surrounding Texas City, La Marque, Hitchcock, and Dickinson. Same standards, same written pricing, same 365-Day Done Right Promise.
Serving Galveston, TX - Our Local Coverage Area
We’re based in the Galveston 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 Galveston
Yes. In Galveston’s historic housing stock, especially pre-1900 homes in the East End Historic District, we clean to source removal before sealing. Original galvanized ducts carry rust flakes and mold colonies from the 1900 Hurricane and 2008 Ike storm surge; sealing over them without EPA-registered disinfection traps spores inside the system. Call (361) 326-5060 for a free inspection and written estimate.
Galveston’s salt-laden air accelerates corrosion inside ductwork and degrades standard sealing tapes within a season. We use mastic and foil tape rated for coastal humidity, and we treat metal surfaces with disinfectant before sealing – steps unnecessary in dry inland climates. Call (361) 326-5060 to discuss your home’s specific exposure.
Yes, we regularly seal and repair crawlspace ducts in Galveston’s raised Victorian and bungalow stock. We access the space, inspect for moisture damage and disconnections, replace compromised flex or corroded metal, and seal joints with materials rated for open-crawlspace humidity. Call (361) 326-5060 for an assessment.
After 15 – 17 years in Galveston’s humidity, post-Ike flex duct shows sagging from moisture absorption, crushing at joist bays, and disconnection at collars where tape has degraded. The insulation jacket often harbors mold. We replace compromised sections with new insulated flex before sealing any joints. Call (361) 326-5060 for camera inspection.
Duct sealing helps only after mold source removal. In Galveston, mold smells usually indicate active colonies inside ductwork from condensation and salt-air corrosion. We disinfect with EPA-registered products to FEMA flood-repair protocols, then seal to prevent recontamination. Sealing over live mold traps the problem. Call (361) 326-5060 for proper diagnosis.
We pulled up to a raised Victorian on Broadway in the East End Historic District where the homeowner complained of musty air and high electric bills after every summer storm. Our camera inspection of the crawlspace supply and return ducts showed flex duct installed during Ike repairs was crushed at two joist bays and disconnected near the air handler, while the original galvanized trunk line had rust scaling from salt-laden condensation. We reconnected the runs, sealed the joints with mastic and foil tape to NADCA standards, and treated the interior with an EPA-registered disinfectant – the homeowner’s humidity readings dropped and the musty smell cleared within days.
In Galveston’s East End Historic District, duct sealing isn’t just about energy loss – it’s a mold and corrosion service, because original galvanized ducts in pre-1900 homes still carry rust flakes and mold colonies from the 1900 Hurricane and 2008 Ike storm surge, and sealing over them without EPA-registered disinfection traps spores inside the system. No inland Texas city has to account for salt-laden air and storm-surge aftermath the way Galveston does. That’s why our crews carry disinfectants rated for flood remediation, document every treatment for insurance claims, and never seal over active corrosion.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Galveston since 2004.