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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After
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AfterFast, Reliable Duct Sealing Across Delray Beach
We seal ducts in Delray Beach homes where salt air, year-round humidity, and aging HVAC systems turn small leaks into big problems. Whether you’re in a 1970s ranch off Atlantic Avenue or a high-velocity mini-duct system along A1A, our crews arrive with mastic, mesh, and camera gear to find the real failure point, not just patch what’s visible. Dispatch and scheduling run through our Miami office, but the technicians who pull up to your driveway know Delray Beach’s housing stock and its particular headaches. Call (361) 326-5060 for a free estimate with a written price before any work starts.
Why Hollis Air Duct Cleaning Is Delray Beach’s Preferred Duct Sealing Company
We’ve been doing this since 2004 as part of the Garrison Partners family, and our Duct Sealing team has learned what fails first in coastal South Florida. Delray Beach homeowners call us back because we show up inside the window, price the job in writing before touching anything, and leave the site clean. Our 365-Day Done Right Promise means if the seal fails or the musty smell returns within a year, we come back at no charge, including a free second visit. Technicians are background-checked and uniformed; you know who’s arriving before they knock. Phones are answered by a live person 24 hours a day, seven days a week, no voicemail loops.
We don’t compete on teaser coupons. We compete on discipline: written prices, written guarantees, and equipment that matches what commercial crews use, including Rotobrush rotary systems and Nikro negative-air machines.
HVAC Duct Sealing in Delray Beach
HVAC Duct Sealing in Delray Beach means closing the gaps, joints, and corrosion points that let conditioned air escape into your attic, crawlspace, or slab before it ever reaches your rooms. In this market, a typical whole-system seal runs $450 – $850 for standard residential ductwork, with multi-zone or high-velocity mini-duct systems along the Intracoastal running $900 – $1,400 due to access complexity and the precision required. Most Delray Beach homeowners need sealing when they notice uneven cooling, rising FPL bills, or musty odors that don’t clear even after the coils are cleaned.
What We Seal and How
We use duct sealing mastic reinforced with fiberglass mesh on accessible joints and seams, not foil tape that peels in our humidity. For buried or slab ductwork, we camera-inspect first to confirm the failure mode. If the duct is intact but leaking at joints, we seal. If the transite or flex is cracked or corroded through, we tell you plainly and quote a repair or re-route before any seal goes on.
When Sealing Becomes a Repair
A seal is not a fix for collapsed, corroded, or biologically contaminated ductwork. In Delray Beach’s older neighborhoods like Osceola Park, we’ve opened attics to find 40-year-old flex duct where the inner liner has turned to powder. Sealing that would be a waste of your money. We flag it, show you the camera feed, and price the honest solution.
Duct Repair in Delray Beach
Duct Repair in Delray Beach covers the damage that sealing alone won’t fix: corroded trunk lines, collapsed flex runs, disconnected returns, and the unique failure of transite slab ductwork in pre-1950 homes near the Marina District and Pineapple Grove. A typical repair here, including partial re-routing through the attic, runs $650 – $1,200 for single-return systems in older ranches, with more complex multi-zone repairs in newer Intracoastal builds ranging $1,100 – $2,000. We see the most calls after hurricane season, when power cycling and moisture intrusion stress already compromised systems.
Slab Duct Re-Routing
When original transite ducts buried in concrete crack, no sealant reaches them. We design an attic re-route with insulated flex or hard pipe, sealed at every joint with mastic, and terminate it properly at the registers. It’s more work than a standard seal. It’s also the only way to stop groundwater and musty air from entering your system.
Salt Corrosion on Beachside Systems
Homes along A1A and the Intracoastal see accelerated corrosion on metal trunk lines and mini-duct inner liners. We replace the compromised sections with marine-grade materials and seal the new joints to current Florida mechanical code. Camera inspection confirms we caught every thinned spot, not just the obvious ones.
Trusted Brands We Service in Delray Beach
Our trucks carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration and sealing products from Honeywell, Aprilaire, and Guardsman. We stock common duct diameters, collar sizes, and mastic compounds for Delray Beach’s predominant system types, so most repairs don’t wait on parts. For high-velocity mini-duct systems in newer Intracoastal builds, we source compatible fittings direct from the manufacturer and typically turn those jobs around in one visit. Every tool on our van is what commercial crews use, not hardware-store substitutes.
Common Duct Sealing Problems We See in Delray Beach Homes
- Musty odors that return after “sanitizing” fogging. Fogging doesn’t remove the biofilm growing on duct walls; it covers the smell temporarily. In Delray Beach’s humidity, that moisture gets trapped behind a fresh seal and smells worse within weeks. We clean first, seal second.
- Foil tape failing on attic trunk lines. The adhesive degrades fast in our heat and humidity. We find it hanging in strips above homes in Kings Point and western subdivisions. Mastic and mesh last; tape doesn’t.
- Sealed slab ducts with cracked transite underneath. In Osceola Park and the historic districts, crews sometimes seal the registers and call it done while groundwater still seeps through the buried pipe. Camera inspection catches this; sealing over it doesn’t.
- High-velocity mini-ducts with corroded inner liners along A1A. Salt air thins the polymer liner until it pinholes. A surface seal hides the leak temporarily; replacement of the compromised section is the real fix.
Pricing for Duct Sealing in Delray Beach, FL
Here’s what duct sealing actually costs in Delray Beach:
| Service | Typical Range |
|---|---|
| Standard residential duct sealing (single system) | $450 – $850 |
| Multi-zone or high-velocity mini-duct sealing | $900 – $1,400 |
| Duct repair with partial re-routing (slab systems) | $650 – $1,200 |
| Complex repair / multi-zone replacement | $1,100 – $2,000 |
What moves you within these ranges: system accessibility (attic crawl vs. finished ceiling), number of zones, whether camera inspection reveals damage requiring repair before sealing, and the condition of existing insulation. We inspect first, price in writing, and you approve before we start. No per-vent upsells, no fogging packages pushed at the door. Estimates are free. Call (361) 326-5060 for yours.
We Also Serve Cities Near Delray Beach
Our crews work throughout southern Palm Beach County, including Duct Sealing in Delray Beach proper plus Boynton Beach, Boca Raton, Deerfield Beach, and Greenacres. Same standards, same written pricing, same 365-Day Done Right Promise at every stop.
Serving Delray Beach, FL - Our Local Coverage Area
We’re based in the Delray Beach 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 Delray Beach
Duct sealing helps with musty odors only if the ductwork is clean and the leak is the entry point for humid air. Fogging sanitizer masks the smell temporarily; it does not remove the biofilm or moisture source. In Delray Beach’s climate, we always inspect with a camera first. If we find active microbial growth, we clean before we seal. Otherwise you’re sealing moisture inside. Call (361) 326-5060 and we’ll tell you which problem you actually have.
Sometimes, but often the real issue is cracked transite ductwork that no sealant can reach. We camera-inspect first. If the slab duct is intact with leaking joints, we can seal accessible points. If the transite is fractured, we quote a partial re-route through the attic, which is the only permanent fix. We’ve done this exact job on NE 2nd Avenue in Pineapple Grove. Call (361) 326-5060 for an inspection.
Salt air corrodes the inner liner of mini-ducts until they pinhole, and it attacks metal trunk lines and collars faster than inland Florida climates. Sealing a thinned liner is temporary; replacement of the compromised section with marine-grade material, then sealing the new joints, is what lasts. We camera-inspect beachside systems to confirm liner thickness before quoting. Call (361) 326-5060 for an exact assessment.
Year-round humidity and salt-laden air accelerate corrosion and insulation breakdown, while hurricane-season power cycling and closed-window A/C dependency force every breath of indoor air through the duct system. Leaky ducts here pull attic heat, crawlspace moisture, and microbial spores into your living space continuously. The climate doesn’t give you a dry season to recover. Call (361) 326-5060 for a free inspection.
A real job includes camera inspection, manual cleaning of accessible duct surfaces, mastic-and-mesh sealing of verified leaks, and replacement of damaged sections before any seal goes on. A cheap package typically means fogging spray and foil tape on visible joints, which fails in our humidity and often traps moisture. We price by the system, not by the vent, and we write it down before we start. Call (361) 326-5060 for a quote you can compare line by line.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Delray Beach and South Florida since 2004.