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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Doral
Duct sealing in Doral typically runs $800 – $2,400 for a whole-home system, with most single-family homes in villages like Doral Estates and Costa del Sol falling in the $1,200 – $1,800 range. We’re local to South Florida and dispatch crews to Doral from our Miami office, so we understand the specific problems that hit homes here: flex duct soaked after tropical storms, galvanized trunk lines sweating in hot attics, and that musty blast when the AC restarts after a hurricane-season outage. Call (361) 326-5060 for a written estimate before any work starts.
Why Hollis Air Duct Cleaning Is Doral’s Preferred Duct Sealing Company
We’ve been working in Doral’s master-planned communities since long before Downtown Doral’s towers went up, and our crews know the difference between a 1994 CBS home in Doral Estates with original builder-grade flex duct and a 2018 townhome with modern insulated runs. Our Duct Sealing in Doral customers get the same standard every time: a written price before we touch anything, background-checked uniformed technicians who arrive inside the quoted window, and a 365-Day Done Right Promise backed in writing. If a seal fails within a year, we come back and make it right at no charge, including a free second visit. Phones are answered by a live person 24 hours a day, seven days a week. No voicemail loops. No callback queues.
Duct Sealing Services in Doral
Duct Sealing Services in Doral address a specific problem most homeowners don’t notice until their FPL bill climbs or a room stays stubbornly warm: conditioned air escaping through gaps, disconnected joints, and deteriorated seals in the attic or garage ductwork. In Doral’s 1990s – 2010s housing stock, we see two patterns repeatedly. First, the original flex-duct connections at galvanized trunk lines have loosened from years of vibration and thermal cycling. Second, mastic applied by builders in hot attics has cracked or separated. Our crew pressurizes the system, identifies every leak with a smoke pencil or digital manometer, then reseals with fresh mastic and mechanical fasteners rated for South Florida humidity.
Post-Storm Seal-and-Save Assessments
Not every wet duct needs replacement. We use camera inspection and moisture meters to document which sections are salvageable. Galvanized trunk lines often dry and reseal fine. Flex duct with soaked insulation cannot be saved, and we’ll show you exactly why, with photos your insurer can read.
Whole-System Pressure Testing
Before we seal and after, we measure static pressure and airflow at each register. In Doral’s two-story CBS homes, we frequently find the upstairs master bedroom starved because a disconnected flex run in the attic is cooling the garage instead. The numbers don’t lie, and we give you the before-and-after readings in writing.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Duct Insulation in Doral
Duct Insulation in Doral is not an upgrade; for many homes, it’s the repair that makes sealing actually work. The original R-4 or R-6 flex duct in Doral Estates, Costa del Sol, and similar villages has compressed, torn, or grown waterlogged after years in 140-degree attics. Uninsulated or poorly insulated ductwork loses 20 – 30% of cooling energy before the air reaches your rooms, which in Doral’s year-round cooling climate means real money on FPL bills. We replace deteriorated insulation with fresh, properly sized wraps, or swap out failed flex runs entirely when the inner liner is compromised.
Condensation Control in Hot Attics
South Florida’s humidity makes cold ducts sweat. We see it constantly in Doral’s concrete-block homes where the air handler sits in a garage closet and the trunk line runs through an unconditioned attic. Proper insulation stops the drip that leads to mold, ceiling stains, and callbacks.
Insulation Replacement After Water Intrusion
Wet insulation cannot be dried in place. It holds moisture against the duct, breeds mold, and destroys R-value. We remove saturated sections, inspect the underlying duct for corrosion or separation, then reinstall with vapor-barrier-facing correctly oriented for our climate.
Trusted Brands We Service in Doral
Our crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, and we stock filtration and sealing products from Aprilaire and Guardsman for Doral jobs. That matters for turnaround. When a Downtown Doral building manager needs coil-and-duct sanitizing after a shared-system mold complaint, or a Costa del Sol homeowner needs a fast post-storm seal before the next weather system rolls in, we’re not waiting on parts shipments. We specify what we use and why, in plain terms, before any work starts. The same tools commercial crews trust, applied to your home by technicians who follow The Garrison Code: arrive squared away, price in writing, work by the book, leave the site clean.
Common Duct Sealing Problems We See in Doral Homes
- Sealing over wet flex duct after a storm. The moisture stays trapped inside the porous insulation, mold returns within weeks, and the insurer denies the claim because the duct was not properly dried or replaced. We document moisture content with meters before we commit to any seal.
- Mastic failure on fiberboard trunk lines in hot attics. Doral’s year-round cooling cycle means constant expansion and contraction. Tape or mastic applied without first addressing condensation at the air handler plenum will crack again within a season.
- Disturbed mold spores spreading through the house. Any seal job on a contaminated system needs negative pressure containment and HEPA filtration. Skip this, and the homeowner gets a second complaint, a second visit, and a harder conversation with their insurance adjuster.
- Disconnected flex runs cooling the attic instead of the bedroom. In Doral’s two-story CBS homes, we regularly find the flex duct has pulled completely free of the trunk line, blowing thousands of BTUs into the insulation. The room stays hot; the FPL bill climbs; the homeowner blames the AC unit.
Pricing for Duct Sealing in Doral, FL
A typical duct sealing job in Doral runs $800 – $2,400 depending on system size, accessibility, and whether we’re addressing post-storm damage or routine deterioration. Most single-family homes in villages like Doral Estates and Costa del Sol fall between $1,200 and $1,800 for full-system sealing with pressure testing and documentation. Downtown Doral mid-rise units and townhomes with closet air handlers usually range $800 – $1,400. Duct insulation replacement adds $400 – $900 depending on linear footage. We do not quote per-vent teaser prices that balloon once the technician arrives. We give one flat price per system, agreed in writing, before any work begins. Estimates are free. Call (361) 326-5060.
We Also Serve Cities Near Doral
Our Duct Sealing crews work across South Florida and travel to Jacksonville, Miami, Tampa, and Orlando for larger commercial and multi-unit jobs. Scheduling and dispatch are coordinated from our Miami office, with local Doral crews available for residential calls.
Serving Doral, FL - Our Local Coverage Area
We’re based in the Doral 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 Doral
It depends on the duct material and moisture damage. Galvanized trunk lines that stayed dry can usually be sealed and saved; flex duct with wet insulation must be replaced because the porous material cannot be dried. We document everything with camera inspection, moisture readings, and photos formatted to NADCA standards so your insurer can see the difference. Call (361) 326-5060 for a free assessment.
Stagnant humidity in the ductwork breeds mold and mildew while the system is down, then the first restart blows those spores through every register. In Doral’s tropical climate, this happens faster than in seasonal markets because the ambient humidity rarely drops below 70%. Sealing leaks that draw attic air, combined with proper insulation and sometimes coil sanitizing, stops the cycle. Call (361) 326-5060 and we’ll trace the source.
Yes, typically 15 – 25% in homes with significant leakage, which describes most 1990s – 2000s Doral construction we’ve tested. When 20 – 30% of your cooled air escapes into a 140-degree attic before reaching the rooms, your system runs longer and harder. Doral’s year-round cooling load means those savings accumulate every month, not just in summer. Call (361) 326-5060 for a pressure test that quantifies your specific leakage.
We provide a written, itemized NADCA-standards report with dated photos, moisture-content readings, and clear separation of salvageable versus non-salvageable sections. This documentation is designed for adjuster review and has been accepted by insurers on Doral claims. We do not guess or generalize; we measure and photograph every run. Call (361) 326-5060 after any water intrusion.
Yes. Closet-mounted air handlers in Downtown Doral and similar developments have shorter duct runs but tighter access, and the shared-wall penetrations require careful sealing to prevent cross-unit odor transfer. We use compact inspection cameras and low-profile tools designed for confined spaces, and we coordinate with building management when needed. Call (361) 326-5060 for a written estimate.
We were called to a two-story CBS home in Doral Estates after a tropical storm pushed water through the garage air handler closet; the flex-duct runs in the attic had soaked insulation and a musty smell hit the supply registers on the first restart. Using camera inspection and agitation tools, we documented the wet flex sections versus the dry galvanized trunk, sealed and re-insulated the savable runs, and gave the homeowner an itemized NADCA-standards report that their insurer accepted for partial replacement.
Doral’s 1990s – 2010s Mediterranean-revival CBS homes in villages like Doral Estates and Costa del Sol still run their original builder-grade flex duct; the same duct that survived a hurricane can fail an insurer’s post-water-intrusion claim because the flex duct is porous and cannot be dried, while the galvanized trunk can often be sealed and saved. This distinction matters for your wallet and your coverage. We make it with data, not opinions, and we put that data in writing before any work starts.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Doral since 2004.