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 Gulfport
Duct sealing in Gulfport, FL typically costs $350 – $850 for a whole-home system, with most jobs completed in a single visit. If your ducts are leaking conditioned air into a hot attic or humid crawlspace, you’re paying to cool the wrong spaces. Call Hollis Air Duct Cleaning at (361) 326-5060 for a free written estimate before any work starts.
We know Gulfport’s homes. The 1920s bungalows near the waterfront, the mid-century ranches off 49th Street South, the pier cottages in the Marina District – we’ve sealed ducts in all of them. Our crews dispatch from our South Florida office and serve Gulfport directly, carrying the same Rotobrush and Nikro equipment we use on commercial jobs. Roy Castellanos and our team understand that in this climate, a duct seal isn’t just about stopping air leaks. It’s about keeping salt-laden humidity out of your system.
Why Hollis Air Duct Cleaning Is Gulfport’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. We operate under The Garrison Standard: written prices, written guarantees, and technicians who arrive inside the quoted window wearing a clean uniform. Gulfport homeowners don’t need another company that shows up late and invents charges at the door.
Our 365-Day Done Right Promise covers every duct sealing job in writing. If a seal fails within a year, we return and make it right at no charge, including a free second visit. No negotiation, no runaround.
Phones are answered by a live person 24 hours a day, 7 days a week. When you call (361) 326-5060, you talk to a human who can schedule your Gulfport appointment, not a voicemail loop.
We document everything. Before-and-after photos, moisture readings, written findings. In a flood-prone city like Gulfport, that documentation matters for insurance claims and for your own peace of mind.
Duct Repair in Gulfport
Duct Repair in Gulfport often starts with a phone call after a homeowner notices weak airflow, hot spots, or a spike in their FPL bill. Our technicians inspect the full system with a camera, identify collapsed flex duct, rusted collars, or separated joints, and give you a written price before touching anything. In Gulfport’s market, duct repair typically runs $250 – $600 depending on how many runs are affected and whether we can access them through the attic or need to enter a crawlspace.
When Repair Makes Sense
We repair when the hard duct is sound and only the flex connections or register boots have failed. A 1960s ranch near Tomlinson Park might have solid galvanized trunk lines with deteriorated flex tails – we cut out the bad sections, seal the joints with mastic, and reload with new insulated flex. The homeowner gets a written photo log of every connection.
When Repair Is a Bad Call
We won’t patch over saltwater-corroded metal. If a tropical storm pushed surge into your crawlspace and the collars are rusted through, mastic won’t bond to that substrate. Sealing over it traps moisture and guarantees failure within a season. We tell you straight when replacement is the only honest option.
Air Duct Sealing in Gulfport
Air Duct Sealing in Gulfport targets the gaps and seams where conditioned air escapes before reaching your rooms. We use mastic compound and professional-grade foil tape on every joint, seam, and penetration – the same materials specified by Honeywell and Aprilaire for their filtration systems. A typical whole-home sealing job in Gulfport runs $350 – $850, with smaller partial systems starting around $250.
The Mastic Method
Mastic is a thick, fiber-reinforced sealant that brushes onto duct joints and cures to a hard, durable finish. Unlike duct tape, which degrades in Gulfport’s attic heat within two years, mastic stays flexible and maintains its seal through decades of thermal cycling. We apply it to every accessible joint in your system.
Pressure Testing After Sealing
After we seal, we run a pressure test to verify the improvement. Our Nikro negative-air equipment lets us measure leakage before and after. You see the numbers. If the reduction doesn’t meet our standard, we find the missed leaks and correct them before we leave.
Trusted Brands We Service in Gulfport
Hollis carries professional-grade equipment and materials from Nikro, Honeywell, Aprilaire, and Abatement Technologies. We stock mastic, foil tape, and flex duct in common Gulfport sizes so we’re not waiting on a parts run while your attic heats up. Our technicians train on the same rotary brush systems and negative-air machines used in hospitals and commercial buildings. When we seal a duct in a 1920s bungalow near Gulfport’s waterfront, we’re using materials rated for the humidity and salt air that define this market.
Common Duct Sealing Problems We See in Gulfport Homes
- Storm-soaked flex duct in Marina District crawlspaces. After surge flooding, flex duct insulation becomes waterlogged and collapses. Sealing the exterior does nothing – the duct is structurally failed and growing mold inside the insulation jacket. We replace, then seal the new runs properly.
- Rusted register boots in unconditioned attics. Gulfport’s year-round humidity condenses on cold metal where ducts meet ceiling registers. The boot rusts, the seal fails, and conditioned air pours into the attic. We replace corroded boots with galvanized or aluminum fittings, then seal with mastic rated for wet locations.
- Undersized 1950s ductwork struggling against modern HVAC loads. Many Gulfport bungalows were built before central air. Retrofitted ducts are too small, creating high velocity and turbulence that blows seals apart at the joints. We resize where possible and reinforce connections with mechanical fasteners plus mastic.
- Salt corrosion on pier-home under-floor systems. Homes on piers near Boca Ciega Bay get salt spray and tidal humidity from below. Metal collars and dampers corrode faster than inland Pinellas County. We inspect with a camera, document the corrosion, and replace compromised metal before sealing.
Pricing for Duct Sealing in Gulfport, FL
A typical whole-home duct sealing in Gulfport runs $350 – $850. Partial sealing of a single zone or problem area starts around $250. Full duct replacement after flood damage ranges from $1,500 – $4,500 depending on home size and access difficulty.
What moves the price: how much of the system is accessible without demolition, whether we’re sealing existing sound duct or replacing failed sections first, and whether the job requires crawlspace work in a pier home versus attic access in a slab ranch. We give you one flat price per system, agreed in writing before we start. No per-vent add-ons, no equipment fees that appear at the door.
Every estimate is free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Gulfport
Hollis Air Duct Cleaning dispatches crews throughout the region from our Miami office. We also provide Duct Sealing in Jacksonville, Miami, Tampa, and Orlando. If you’re in Gulfport proper, our Gulfport team handles your job directly with local knowledge of Pinellas County conditions and building styles.
Serving Gulfport, FL - Our Local Coverage Area
We’re based in the Gulfport 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 Gulfport
If saltwater reached the insulation inside your flex duct, replacement is almost always necessary. Cleaning removes surface debris but cannot extract moisture from saturated insulation or restore corroded metal collars. We use a borescope camera to inspect the interior, measure moisture content, and document our findings with photos so you have a clear basis for the decision. Call (361) 326-5060 for a free inspection.
We provide dated before-and-after photos, moisture meter readings at multiple points, written descriptions of visible corrosion or mold, and a clear statement of why replacement meets the standard of care. Our field vignette from the Marina District – a 1940s pier bungalow after tropical storm flooding – shows exactly this process: we labeled every affected run, recorded the moisture readings, and the adjuster approved the claim based on our documentation. We do the same for your Gulfport home.
Gulfport’s humid subtropical climate means year-round moisture in unconditioned spaces. Attic temperatures hit 140°F in summer while your duct carries 55°F air; the temperature differential causes condensation at every joint and register boot. That constant wetness feeds mold and rusts metal. Proper sealing with mastic reduces the air leakage that carries humid attic air into the system, but it cannot eliminate condensation entirely in a vented attic. We inspect and advise on whether additional insulation or dehumidification is warranted.
Yes. The National Air Duct Cleaners Association standards govern our inspection, cleaning, and sealing protocols, including the requirement to protect the occupant’s property and to verify system performance after work. In Gulfport’s 1920s – 1950s homes, we apply those standards with additional care for fragile original materials and the specific failure modes of salt-air corrosion. We explain every step in plain terms before we start.
Duct repair fixes broken or failed components: collapsed flex, rusted boots, separated joints. Duct sealing closes the gaps and seams in otherwise sound ductwork where air leaks out. Your Gulfport home needs repair first if flooding or age has damaged the physical duct, then sealing to ensure the repaired system performs efficiently. We inspect and tell you which applies, or whether both are needed. Call (361) 326-5060 for a free written assessment.
Ready to stop losing conditioned air to your attic or crawlspace? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate on duct sealing in Gulfport. We’ll give you a written price before any work starts, and our 365-Day Done Right Promise covers every seal we apply.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Gulfport and the greater Tampa Bay area since 2004.