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 Coral Terrace
Duct sealing in Coral Terrace typically runs $450 – $1,200 for a whole-house seal on original 1950s – 1970s metal ductwork, and most jobs are completed in a single visit. If your home was built during Coral Terrace’s building boom, there’s a strong chance your galvanized trunk lines were never sealed at the joints, and that gap is costing you money every month.
We’re the Duct Sealing crew from Hollis Air Duct Cleaning, and we’ve been crawling through Coral Terrace attics long enough to know the pattern. Dispatch and scheduling run through our Miami office, but our technicians live and work in South Florida, which means we understand what the summer humidity does to ductwork in this specific slice of Miami-Dade County. We serve homes off Coral Way, near the Granada Boulevard corridor, and throughout the single-story ranch neighborhoods that define this area. When you call (361) 326-5060, a live person answers, 24 hours a day, and we’ll get you a written price before any work starts.
Why Hollis Air Duct Cleaning Is Coral Terrace’s Preferred Duct Sealing Company
We’ve built our reputation in Coral Terrace on showing up inside the window, pricing in writing, and leaving the site clean. That’s The Garrison Standard, and it applies to every job we do here.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. The 365-Day Done Right Promise covers every duct sealing job in writing: if the seal fails or the problem returns within a year, we come back and make it right at no charge, including a free second visit.
We don’t bait and switch. The price we write down before work starts is the price you pay. No per-vent add-ons, no surprise charges once the van is in your driveway. That’s especially important in Coral Terrace, where many homeowners have already been burned by low-quote duct cleaners who vacuumed the vents but never touched the leaking trunk lines.
Our crew knows the local housing stock. We’ve sealed ducts in the concrete-block ranches near Bird Road, the wood-frame homes south of Coral Way, and the mid-century subdivisions throughout the 33144 and 33155 ZIP codes. We know where the water pools, where the joints separate, and where the mold starts.
Duct Sealing Services in Coral Terrace
Duct Sealing Services in Coral Terrace focus on closing the gaps in your forced-air system where conditioned air escapes and unconditioned air gets pulled in. In this market, that usually means sealing original galvanized steel trunk lines at their joints, reconnecting separated runs, and applying mastic and mesh to stop the leaks that drive up energy bills and drag humidity into your living space. A typical whole-house duct sealing job in Coral Terrace runs $450 – $1,200, depending on the linear footage of ductwork, accessibility, and whether we find water damage that requires additional repair.
Metal Trunk Line Resealing
Most Coral Terrace homes built between 1955 and 1975 have rectangular galvanized steel trunk lines that were assembled at the joints with slip connections and a few screws, but never sealed with mastic. Decades of thermal cycling, attic heat, and condensation have popped those joints apart. We reconnect the seams and seal them with fiber-reinforced mastic, which stays flexible and won’t crack like tape. This is the core fix in most Coral Terrace jobs.
Flex Duct Repair and Replacement
When flex duct runs in attics or crawlspaces have pooled water after heavy rains, the inner liner degrades and the insulation gets saturated. Sealing the outer jacket won’t fix the problem. We drain the standing water, replace damaged flex runs with new insulated duct, and seal the connections back to the trunk. This is common in Coral Terrace after summer downpours.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Duct Insulation in Coral Terrace
Duct Insulation in Coral Terrace addresses the condensation that forms on cool metal ducts running through hot, humid attics. In this climate, uninsulated or poorly insulated ductwork sweats like a cold glass of water on a July afternoon, and that moisture feeds mold, rusts metal, and drips onto ceilings. Adding or replacing duct insulation typically costs $300 – $800 in Coral Terrace, depending on the linear footage and whether we’re wrapping existing trunks or insulating new replacement runs.
Attic Trunk Wrap
We wrap exposed galvanized trunks with formaldehyde-free fiberglass duct insulation, secured with mechanical fasteners and sealed at every seam. This stops condensation, protects the mastic seals we just applied, and reduces heat gain so your cooled air arrives at the register closer to the temperature your thermostat set. In Coral Terrace’s subtropical climate, this step is not optional if you want the seal to last.
Crawlspace Run Insulation
Flexible duct runs in Coral Terrace crawlspaces sit close to the damp ground. We use closed-cell insulation with a vapor barrier jacket to prevent ground moisture from wicking through. This matters because the high water table in this area keeps crawlspace humidity elevated year-round, even in winter.
Trusted Brands We Service in Coral Terrace
Our equipment comes from Rotobrush, Nikro, and Abatement Technologies, the same brands commercial crews use in hospitals and schools. We don’t show up with hardware-store gear. For filtration and air handler components, we stock Honeywell, Aprilaire, and Guardsman products, and we keep common sizes on our vans so Coral Terrace customers aren’t waiting for parts to ship. That means faster turnaround on jobs where corroded plenum seams or blower housings need attention alongside the sealing work.
Common Duct Sealing Problems We See in Coral Terrace Homes
- Original galvanized trunk joints pop apart from decades of thermal cycling. The 1950s – 1970s metal ductwork in Coral Terrace was never sealed at the factory joints. Every summer, the metal expands; every winter cold snap, it contracts. After sixty years, the seams have worked themselves open, and your system is pulling attic air into the supply.
- Standing water in flex ducts after heavy summer rains. Coral Terrace’s summer downpours are intense, and attic or crawlspace flex runs with low spots collect water. That standing moisture breeds mold that no amount of duct cleaning will remove until the water is drained and the damaged flex is replaced.
- Corroded air handler cabinets and plenum seams. The damp attic environment in Coral Terrace attacks the metal housing around your air handler. We frequently find rusted blower motor housings and separated plenum connections that leak conditioned air into the attic. Sealing the trunk without addressing the cabinet just moves the leak upstream.
- Disconnected or crushed duct runs from prior work. Cable installers, pest control techs, and homeowners themselves have crawled through Coral Terrace attics for decades. We’ve found supply runs kicked completely off boots, flex ducts crushed under stored boxes, and retrofitted insulation burying registers. These aren’t sealing problems alone, but they’re always discovered during a proper sealing inspection.
Pricing for Duct Sealing in Coral Terrace, FL
Whole-house duct sealing in Coral Terrace typically costs $450 – $1,200. Duct insulation runs $300 – $800. Combined sealing and insulation jobs for a full 1950s ranch usually fall between $750 and $1,800.
What moves the price: linear footage of ductwork, accessibility (tight attics take longer), whether we find water-damaged flex that needs replacement, and if the air handler cabinet itself needs resealing. We do not price per vent. One flat price per system, agreed in writing before any work starts. No add-ons at the door.
Every estimate is free. We’ll inspect your ductwork with a camera, show you what we found, and write the price down. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Coral Terrace
Hollis Air Duct Cleaning provides Duct Sealing in Coral Terrace and throughout South Florida, including Jacksonville, Miami, Tampa, and Orlando. Each location operates independently under The Garrison Standard, with the same written pricing and 365-Day Done Right Promise.
Serving Coral Terrace, FL - Our Local Coverage Area
We’re based in the Coral Terrace 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 Coral Terrace
Original galvanized steel ducts from the 1960s can almost always be resealed if the metal itself is intact. We inspect with a camera first. If the trunk line has rusted through or collapsed, we’ll tell you before we touch anything. Most Coral Terrace ranches just need the joints reconnected and sealed with mastic and mesh, plus insulation to prevent future condensation damage. Call (361) 326-5060 for a free camera inspection.
The musty smell is usually mold growing inside damp ductwork or on the air handler cabinet, not just dust in the vents. Duct cleaning removes loose debris but doesn’t stop the moisture that’s feeding the mold. In Coral Terrace, we find that standing water in flex ducts and unsealed trunk lines pulling humid crawlspace air are the real culprits. Sealing the leaks and insulating the metal stops the moisture source. Call (361) 326-5060 and we’ll trace it.
Yes. Supply ducts run under positive pressure, so leaks blow conditioned air into the attic; return ducts run under negative pressure, so leaks suck hot, humid attic air into the system. In Coral Terrace’s climate, return leaks are actually the bigger problem for humidity and mold. We use mastic and mesh on both, but we pay special attention to return trunk connections and the air handler plenum where the return meets the blower.
It closes the paths where unconditioned, humid air enters your system. In a typical Coral Terrace ranch, we measure static pressure before and after sealing, and we commonly see a 20 – 40% improvement in airflow at the registers. The system runs less, rooms cool more evenly, and the musty smell from attic or crawlspace air disappears because that air is no longer being pulled through your ducts. The fix is mechanical, not cosmetic.
Yes, and in Coral Terrace, most are. Attic air handlers are actually the most common setup we work on. The high heat and humidity in a South Florida attic make sealing and insulation even more critical here than in cooler climates. We reseal the plenum connections, wrap the trunk lines, and verify that condensate drains are flowing properly so water doesn’t back up into the system. Every attic job includes a written price before we start.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Coral Terrace since 2004.