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 Pinellas Park
Duct sealing in Pinellas Park typically runs $450 – $1,200 for a whole-home job, depending on whether we’re sealing accessible trunk lines or chasing leaks through a 130°F attic full of retrofit flex duct. We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and our crews work Pinellas Park regularly – from the concrete block ranches off Park Boulevard to the manufactured home communities around Fairlawn and Lake Seminole – and we also offer our Dryer Vent Cleaning in Pinellas Park. Calls route through our live-answered line at (361) 326-5060, and we schedule from our South Florida dispatch office with arrival windows we actually hit.
Pinellas Park homes have a specific problem most inland Florida markets don’t: original duct systems added as retrofits to houses never designed for central air. That means undersized supply runs, return paths that don’t pull enough volume, and ductwork routed through unconditioned attics where flex ducts sweat against 50-plus inches of annual Gulf Coast rainfall. We seal what can be sealed, replace what can’t, and we put the price in writing before any work starts.
Why Hollis Air Duct Cleaning Is Pinellas Park’s Preferred Duct Sealing Company
We’ve been at this since 2004. The Garrison Standard means our technicians arrive uniformed, background-checked, and inside the quoted window – no “somewhere between 8 and 5” runarounds. Every Duct Sealing job in Pinellas Park gets a written price before we touch anything, and it’s covered by our 365-Day Done Right Promise: if the seal fails or the leak returns within a year, we come back and make it right at no charge, including a free second visit.
Our crews know the local housing stock. We’ve worked the 1950s block homes near 62nd Avenue North, the 1970s ranches around Cross Bayou, and the manufactured home parks off 66th Street. We know which attics have original fibrous duct board that’s turned to sponge after decades of humidity, and which ones have retrofit flex duct sweating through foil-faced insulation. That local knowledge changes what we quote and how we fix it.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues. When you call (361) 326-5060, you talk to someone who can schedule, not a machine that promises a callback.
Duct Insulation in Pinellas Park
Duct Insulation in Pinellas Park is often the difference between a sealed duct that stays sealed and one that fails the same summer. The retrofit flex ducts common in this city’s older neighborhoods run through attics that hit 130°F or higher from May through October. Without proper insulation, the cold air inside condenses moisture on the exterior jacket, which wicks into mastic seams, loosens foil tape, and saturates surrounding duct board. We insulate with foil-faced wrap rated for Florida attic conditions, sealed at every seam with high-temperature mastic, not hardware-store tape.
Most Pinellas Park homeowners need duct insulation when they notice ceiling stains after heavy rains, rooms that never cool evenly, or energy bills that climb despite a newer AC unit. A typical duct insulation job here runs $600 – $1,400 for a single-story home, depending on linear footage and attic accessibility. We inspect first, quote in writing, and explain exactly which runs need wrapping and which have degraded past saving.
Attic Condensation Control
The unconditioned attics in Pinellas Park’s 1950s – 1970s ranches are moisture traps. When cold supply air meets 130°F attic air through a thin flex duct wall, condensation forms fast. Proper insulation with vapor-barrier wrap breaks that thermal bridge and protects the seal work underneath.
Manufactured Home Duct Runs
Communities like Fairlawn and Lake Seminole use belly-wrap duct systems under the home, not attic runs. These are harder to access but just as vulnerable to humidity damage. We inspect with cameras before quoting, then insulate and seal only what’s actually failing.
HVAC Duct Sealing in Pinellas Park
HVAC Duct Sealing in Pinellas Park fixes the leaks that steal 20 – 30% of conditioned air before it reaches your rooms. In this market, the leaks aren’t usually at visible registers – they’re at flex-to-trunk connections in the attic, seams in original duct board that have opened from decades of thermal cycling, and poorly supported sagging flex that pulls apart at the collar. We pressure-test the system first, mark every leak, then seal with mastic and mechanical fasteners, not tape alone.
A homeowner in Pinellas Park needs HVAC duct sealing when rooms stay hot despite good airflow at the vent, when dust blows from ceiling returns, or when the AC runs constantly without catching up. Typical whole-home sealing here costs $450 – $1,200, with simpler register-and-trunk jobs at the lower end and full attic resealing with insulation replacement at the upper. We always check static pressure after sealing an undersized retrofit system – seal too tight and you can starve the air handler, making the original problem worse.
Pressure Testing Before Sealing
We run a duct blaster or calibrated fan to measure leakage in CFM at 25 Pascals. This gives us a baseline and shows you the number in writing. After sealing, we test again. The difference is what you paid for.
Mastic vs. Tape in Humid Attics
Foil tape fails in Pinellas Park attics within a season if applied over damp duct board or in high humidity. We use water-based mastic formulated for HVAC applications, applied to dry surfaces only, with a cure time that accounts for local conditions. It’s slower. It lasts.
Trusted Brands We Service in Pinellas Park
Our trucks carry professional-grade equipment, not hardware-store substitutes. For duct sealing and insulation work in Pinellas Park, we stock Nikro negative-air machines for controlled containment during seal work, Honeywell media filters for post-seal air handler protection, and Aprilaire dehumidistat controls when humidity management is part of the fix. We also source Abatement Technologies HEPA filtration for source-removal of microbial contamination before we seal – because sealing over active mold growth traps the problem, doesn’t solve it. Parts and materials are on the truck, so most jobs finish in one visit without waiting on supply house orders.
Common Duct Sealing Problems We See in Pinellas Park Homes
- Retrofit flex ducts sweating in 130°F attics. The condensation drips onto drywall below, causing ceiling stains that homeowners mistake for roof leaks. We see this constantly in older neighborhoods off Park Boulevard and 62nd Avenue North after summer downpours. The fix is insulation and sealing together, not one or the other.
- Mastic applied over wet duct board failing within one season. Humidity in Pinellas Park attics prevents proper adhesive curing. We dry the surface first, sometimes with temporary heat and airflow, then seal. Skipping this step is why cheap seal jobs don’t last here.
- Fogging “sanitiser” upsells that leave the moisture source untouched. A chemical mist over duct surfaces kills what’s visible but doesn’t remove the microbial mat or stop the sweating flex that feeds it. Growth returns in weeks. We source-remove with agitation and HEPA-negative air, then fix the moisture problem.
- Sealing without checking static pressure on undersized retrofit systems. Pinellas Park’s 1950s – 1970s block homes have supply and return ducts too small for modern dehumidification loads. Seal every leak and airflow drops below what the air handler needs. We measure before and after.
Pricing for Duct Sealing in Pinellas Park, FL
Whole-home duct sealing in Pinellas Park runs $450 – $1,200. Single-room or partial trunk sealing starts around $350. Duct insulation adds $600 – $1,400 depending on linear footage. What moves the price: attic accessibility (tight truss spaces take longer), whether we’re sealing existing duct board or replacing degraded flex, and whether source-removal of microbial growth is needed before seal work begins.
We don’t quote per-vent. We don’t bait with a low coupon that balloons once we’re inside. One flat price per system, agreed in writing, before any work starts. Every estimate is free. Call (361) 326-5060 and we’ll schedule a look.
We Also Serve Cities Near Pinellas Park
Our crews cover Dunedin, Largo, Seminole, and Clearwater from the same South Florida dispatch base. Same equipment, same written pricing, same 365-Day Done Right Promise. If you’re in one of these neighboring markets, we can schedule you on the same routes that serve Pinellas Park.
Serving Pinellas Park, FL - Our Local Coverage Area
We’re based in the Pinellas 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 Pinellas Park
Pinellas Park’s 1950s – 1970s concrete block ranches were built for cross-ventilation with no central air, so the retrofit duct systems later added are almost always undersized for year-round dehumidification. Supply and return ducts in these homes show mold and mildew long before neighbors’ newer builds do. The Gulf Coast humidity, 50-plus inches of annual rainfall, and 130°F attic temperatures create perfect conditions for microbial growth in ducts that can’t move enough air to dry themselves. Call (361) 326-5060 for a camera inspection if you suspect mold.
No, not as a standalone treatment. Fogging kills surface organisms but doesn’t remove the microbial mat or fix the moisture source – usually sweating flex duct in an unconditioned attic. In Pinellas Park’s climate, growth returns within weeks. We source-remove contamination with agitation tools, HEPA-negative air from Nikro machines, and controlled containment first. Then we seal and insulate to stop the moisture. That’s the only sequence that lasts.
In Fairlawn and Lake Seminole, duct sealing fixes the leaks at flex-to-trunk connections, sagging unsupported runs, and separated belly-wrap seams that lose conditioned air before it reaches your rooms. For manufactured homes specifically, we also address the unique access challenges of under-home duct runs. What it doesn’t fix: undersized duct systems that need redesign, or water-damaged duct board that’s structurally failed. We inspect with cameras and tell you which is which before quoting.
Signs of an undersized retrofit system in Pinellas Park: AC runs constantly in July and August, rooms farthest from the air handler stay 5 – 10 degrees warmer, and the house never feels dry despite low thermostat settings. We measure static pressure across the air handler and compare supply and return CFM to what the square footage and duct layout should carry. If the numbers don’t match, we tell you sealing alone won’t solve it and explain your options.
We seal original duct board if it’s structurally sound and dry. In Pinellas Park’s older homes, we often find fibrous duct board that’s become a moisture sponge after decades in humid attics – saturated, collapsing, or actively growing mold. That gets replaced, not sealed. We show you camera footage of the actual condition and quote each section separately so you know what’s being sealed, what’s being replaced, and why.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Pinellas Park since 2004.