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 Freeport
Duct sealing in Freeport, TX typically runs $800 – $2,400 per HVAC system depending on access, duct material, and whether your home has slab-embedded galvanized lines that need pre-treatment. Most Freeport jobs take one to two days, with written pricing agreed before any work starts. Call (361) 326-5060 for a free estimate.
We’ve worked the raised ranches and Capes south of Sunrise Highway, the slab-on-grade streets near the Nautical Mile, and the newer canal construction throughout Freeport long enough to know that no two duct systems here are the same. Our dispatch and scheduling are coordinated from our Dallas-Fort Worth office, but our crews serve Freeport locally and understand what coastal Texas conditions do to ductwork. When salt air, high water tables, and slab-embedded galvanized steel are part of the equation, standard sealing methods fail. We don’t guess. We camera-inspect, test for salt residue, and price per system so you know exactly what you’re paying for before we open a single register boot.
Why Hollis Air Duct Cleaning Is Freeport’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004, and our Duct Sealing in Freeport crews operate under The Garrison Standard: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. That standard matters more in Freeport than most places because the ductwork here hides problems you cannot see without the right equipment.
Freeport homeowners call us back because we document everything. Our background-checked, uniformed technicians carry Rotobrush rotary brush systems and Nikro negative-air machines, and we use filtration and treatment products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman. Every job gets a written price before work begins and is covered by our 365-Day Done Right Promise. If the 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, 7 days a week. No voicemail loops. No callback queues.
Duct Insulation in Freeport
Duct Insulation in Freeport addresses a specific problem: the temperature loss that happens when conditioned air moves through uninsulated or poorly insulated ductwork, especially in attics, crawl spaces, and the slab-embedded runs common in homes south of Sunrise Highway. In Freeport’s humid climate, insulation also controls condensation that leads to mold and mildew inside the system. A typical duct insulation job in Freeport runs $600 – $1,800 per system depending on linear footage, access points, and whether the existing insulation has degraded from moisture or pest damage.
When Insulation Beats Sealing Alone
Some Freeport homes have ducts that are structurally sound but thermally inefficient. The raised ranches near the Nautical Mile often have long attic runs where fiberglass insulation has compressed to half its original thickness after fifteen years of Gulf Coast heat. In these cases, sealing the leaks helps, but replacing or supplementing the insulation delivers the temperature stability homeowners are actually after. We assess both and tell you which matters more for your specific layout.
Material and Method for Coastal Conditions
We use closed-cell foam and foil-faced rigid board rated for high-humidity environments, not the standard batts that absorb moisture and collapse. In flood-prone zones, we also specify materials that won’t harbor mold if they get wet. Every insulation job includes a photo log of before-and-after R-values at representative points.
HVAC Duct Sealing in Freeport
HVAC Duct Sealing in Freeport closes the gaps, cracks, and separated joints that leak conditioned air into attics, walls, and slab voids before it reaches your rooms. In a typical Freeport raised ranch with slab-embedded galvanized ductwork, we see 20 – 35% airflow loss through leaks that are invisible without camera inspection. Sealing restores that airflow, reduces blower motor strain, and can lower heating and cooling costs significantly. A standard HVAC duct sealing job in Freeport ranges from $800 – $2,400 per system, with complex slab-embedded work at the higher end.
Slab-Embedded Systems Require a Different Approach
On Freeport’s slab-on-grade streets south of Sunrise Highway, supply and return ducts are often cast into the concrete itself, so sealing leaks means working from register to register with rotary agitation and camera inspection instead of opening chases. Salt-laden coastal air, especially within a mile of the Atlantic, corrodes original 1950s – 60s galvanized ductwork from the inside, and Superstorm Sandy saltwater left residual salt and organic matter behind even after remediation, so sealants and mastic must go on clean, treated metal or they fail.
Per-System Pricing for Multi-System Homes
Many Freeport raised ranches have two or three separate air handlers, sometimes added in stages as homeowners converted garages or finished basements. We price per system because each has its own duct network, its own leakage profile, and its own access challenges. A single-system quote for a three-system house means two-thirds of your leaks go unsealed and your house still won’t hold pressure. We count the systems, show you each one on camera, and price them separately in writing.
Trusted Brands We Service in Freeport
Our Duct Sealing crews arrive with professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, and we stock filtration and treatment products from Honeywell, Aprilaire, and Guardsman for Freeport jobs. That matters because slab-embedded galvanized ducts in coastal Texas need more than off-the-shelf mastic. We carry anti-corrosion treatments formulated for salt-exposed metal, HEPA extraction systems that handle the fine debris rotary agitation loosens in corroded lines, and camera systems that let you see what we see inside your slab. Parts and materials are on the truck, so we’re not waiting on a supply run while your system sits open. Turnaround for most Freeport sealing jobs is one to two days from inspection to completion.
Common Duct Sealing Problems We See in Freeport Homes
- Sealing over untreated salt residue in flood zones. South of Sunrise Highway, we still find Sandy-era salt and organic matter inside galvanized ducts that were “remediated” years ago. Mastic applied over this residue peels within months. We test first, treat second, seal third.
- Multi-system homes quoted as single-system jobs. A raised ranch off the Nautical Mile might have a 1960s air handler in the basement, a 1990s unit in the garage conversion, and a third system added for a second-floor addition. Sealing one network and ignoring the other two leaves the house leaking and the homeowner wondering why the bills didn’t drop.
- Skipping camera inspection in slab-embedded runs. If we don’t look, we don’t know whether we’re sealing over rust, mold, or standing water. In Freeport’s high water table areas, slab ducts can hold inches of water after heavy rain. Sealing that in traps the problem.
- Using standard sealants on corroded galvanized steel. Salt air within a mile of the Atlantic pits galvanized ductwork from the inside. Standard mastic doesn’t bond to pitted, oxidized metal. We specify anti-corrosion-compatible sealants and apply them to properly prepared surfaces.
Pricing for Duct Sealing in Freeport, TX
Honest pricing for duct sealing in Freeport means per-system quotes, not per-vent teasers that balloon once the technician is inside. Here’s what we typically see in this market:
| Service | Typical Range in Freeport |
|---|---|
| HVAC duct sealing, standard accessible ductwork (1 system) | $800 – $1,400 |
| HVAC duct sealing, slab-embedded galvanized with pre-treatment | $1,600 – $2,400 |
| Duct insulation replacement (1 system) | $600 – $1,800 |
| Camera inspection and salt-residue testing | $150 – $300 (credited toward sealing if hired) |
| Anti-corrosion treatment for salt-exposed metal | $200 – $400 per system |
What moves the price: number of systems, linear footage of ductwork, access (slab-embedded vs. accessible basement or attic), pre-existing corrosion or salt damage requiring treatment, and whether mold remediation is needed before sealing. We inspect, photograph, and write the price down before any work starts. That price does not move at the door. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Freeport
Our crews regularly work in Clute, Lake Jackson, Angleton, and West Columbia. Each community has its own housing stock and ductwork challenges, but the coastal conditions and slab-on-grade construction patterns around Freeport are the most demanding in this service area. If you’re in a nearby city and your home has similar construction, we apply the same inspection protocol and per-system pricing. Call (361) 326-5060 and we’ll tell you whether your address falls in our Freeport service radius.
Serving Freeport, TX - Our Local Coverage Area
We’re based in the Freeport 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 Freeport
Because slab-embedded ducts in Freeport are cast into concrete and cannot be opened for visual inspection without major demolition. Camera inspection reveals rust, standing water, mold, and salt residue that would be sealed in otherwise. We run the camera, show you the footage, and write the findings into your estimate before any sealing begins. Call (361) 326-5060 to schedule a camera inspection.
Salt air within a mile of the Atlantic corrodes galvanized steel ductwork from the inside, creating pits and flakes that standard mastic cannot bond to. In flood zones south of Sunrise Highway, Superstorm Sandy left residual salt that still interferes with sealant adhesion years later. We test for salt residue, apply anti-corrosion treatment to prepared metal, then seal with compatible products. Without this sequence, seals fail within months.
Each system has its own air handler, duct network, and leakage profile. Sealing one while ignoring the other two leaves the house leaking and the energy bills unchanged. We price per system so you know exactly what each network costs to seal, and you can prioritize if budget is a concern. No surprises, no partial jobs sold as whole-house solutions.
You should receive a written invoice with the price agreed before work started, a photo log showing every sealed joint and register boot, camera footage before and after treatment, and a copy of your 365-Day Done Right Promise. This documentation proves the work happened, shows what was found, and gives you recourse if a seal fails. We provide all of this on every Freeport job.
No. Sealing over mold traps it inside the duct where it continues to grow and circulate. If camera inspection shows mold, we recommend source removal first, then sealing the cleaned, dry metal. In Freeport’s humid climate, this sequence is critical. We don’t seal contaminated ducts, and we tell you when mold remediation needs to happen before we proceed. Call (361) 326-5060 and we’ll inspect and advise.
Ready to stop losing conditioned air into your slab, attic, or walls? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate. We’ll camera-inspect your ducts, test for salt residue if you’re in a flood zone, count your systems, and write the price down before any work starts. Every sealing job carries our 365-Day Done Right Promise in writing. If it’s not done right, we make it right at no charge.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Freeport and the Texas Gulf Coast.