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 Miami Shores
Duct sealing in Miami Shores typically costs $450 – $950 for a whole-house system and is usually completed in a single visit. If your home was built in the 1940s through 1960s, you’re likely dealing with original galvanized metal ductwork in an unsealed attic, and that combination of aging metal and South Florida humidity is where most of the leaks start.
We dispatch our crews from our Miami office, and Miami Shores is right in our regular service zone. You’ll get a written price before any work starts, a background-checked uniformed technician who arrives inside the quoted window, and our Duct Sealing work is covered by our 365-Day Done Right Promise. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Miami Shores’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Miami office has handled enough Miami Shores ranch homes to know the pattern. The village’s flat, nearly sea-level terrain and frequent heavy rains create a chronic humidity problem that makes air ducts prone to mold growth, especially in older homes where ductwork runs through unsealed attics and crawlspaces. This isn’t generic Florida weather talk. In Miami Shores, the combination of high water table and mid-century construction means duct sealing here isn’t just about stopping air leaks. It’s about moisture control and breaking the mold cycle.
Our technicians follow The Garrison Code on every job: arrive inside the window, price in writing, complete the work by the book, and leave the site clean. Every repair is backed by our 365-Day Done Right Promise. If the work 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.
Duct Repair in Miami Shores
Duct Repair in Miami Shores most often means addressing corroded galvanized metal joints, reattaching sagging flex duct, or replacing sections of return trunk where water has pooled after a wet-season storm. A typical duct repair in Miami Shores runs $280 – $620 depending on accessibility and how much material needs replacement. Most jobs finish in two to four hours.
Corroded Galvanized Joints
Original 1940s – 1960s galvanized ductwork in Miami Shores attics has usually pitted from years of humidity exposure. We cut out the damaged section and fabricate a replacement using proper sheet metal, then seal with mastic rated for high-humidity environments. Tape alone won’t hold on corroded metal.
Storm-Damaged Return Trunks
After a typical afternoon thunderstorm, our techs often find water intrusion in attic ductwork. We drain the standing water, inspect for mold colonization, replace saturated insulation, and seal the entry points so the next storm doesn’t restart the cycle.
Air Duct Sealing in Miami Shores
Air Duct Sealing in Miami Shores involves closing leaks in the supply and return ductwork using mastic, foil tape, and mechanical fasteners where appropriate, then pressure-testing to verify the seal. A typical whole-house sealing job in Miami Shores runs $450 – $950. Most homes in the village need this done every 18 – 24 months, not because the sealant fails but because the underlying metal keeps corroding and new leaks form.
Attic System Sealing
Most Miami Shores ranch homes have ductwork in unconditioned attics. We seal every joint and seam, then check that the air handler cabinet is gasketed tight. If we only seal the ducts and ignore the blower cabinet, humid attic air gets pulled straight back into the system.
Crawlspace Duct Sealing
Homes near the Biscayne Canal or with partial crawlspace installations face ground moisture wicking up through the foundation. We use moisture-resistant mastic and verify that crawlspace vents aren’t directing humid air directly at duct seams.
Trusted Brands We Service in Miami Shores
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation inside ductwork, Nikro negative-air machines for controlled debris extraction, and filtration products from Abatement Technologies and Guardsman. We stock local parts for Miami Shores customers so turnaround stays tight. When your system needs a component replacement during a sealing job, we don’t order it and make you wait. The technician on site has what the job requires.
Common Duct Sealing Problems We See in Miami Shores Homes
- Sealing over mold instead of removing it first. After a wet-season storm, mold blooms through original galvanized joints within 48 – 72 hours. Sealing traps that moisture inside. We perform source removal with agitation tools and HEPA filtration before any sealant goes on.
- Mastic or foil tape applied to corroded metal. Years of humidity exposure pit galvanized ductwork. The seal looks good for a season, then fails when the metal underneath keeps degrading. We replace corroded sections with new material, then seal.
- Ignoring the air handler cabinet as a leak path. A technician seals every supply and return joint but misses the blower motor cabinet gaskets. Humid attic air pours back in through that gap. We pressure-test the entire system, cabinet included.
- No vapor barrier in the attic. Miami Shores’s high water table and unsealed attics mean moisture migrates through the ceiling plane. Even a perfectly sealed duct system fights a losing battle if the attic itself is saturated. We flag this condition and explain what you’re up against.
Pricing for Duct Sealing in Miami Shores, FL
A typical whole-house duct sealing in Miami Shores runs $450 – $950. Partial sealing of a single zone or limited repair work runs $280 – $620. What moves the number: how much ductwork you have, whether it’s accessible from the attic or requires crawlspace entry, how much corroded metal needs replacement versus simple resealing, and whether mold remediation is needed before sealing can begin.
We give you one flat price per system, agreed in writing before any work starts. No per-vent pricing. No add-ons at the door. You’ll see before-and-after photos of your own ducts. Estimates are free. Call (361) 326-5060.
We Also Serve Cities Near Miami Shores
Our Miami Shores crews also handle jobs in Jacksonville, Miami, Tampa, and Orlando. Each location operates independently under The Garrison Standard, with the same written pricing, background-checked uniformed technicians, and 365-Day Done Right Promise.
Serving Miami Shores, FL - Our Local Coverage Area
We’re based in the Miami Shores 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 Miami Shores
Every 18 – 24 months for most Miami Shores ranch homes with original galvanized attic ductwork. The sealant itself holds longer, but the underlying metal keeps corroding from humidity exposure, so new leaks form at fresh points. Call (361) 326-5060 for an exact quote on your system.
No. Sealing over mold traps moisture and the growth returns stronger. We remove the mold first using source removal with agitation tools and HEPA filtration, then seal the cleaned system. Call (361) 326-5060 to schedule an inspection.
The village’s flat, nearly sea-level terrain and high water table let water pool in unsealed attics, then intrude through gaps in duct joints and poorly sealed return trunks. Original 1940s – 1960s construction without vapor barriers makes this worse. Call (361) 326-5060 for a free estimate on sealing and drainage improvements.
It helps, but it’s not a dehumidifier. Sealing stops your air handler from pulling humid attic air into the living space through duct leaks. In Miami Shores’s climate, you still need proper HVAC sizing and runtime to control indoor humidity. Call (361) 326-5060 and we’ll assess what’s realistic for your home.
Yes. We seal crawlspace ductwork using moisture-resistant mastic and verify that foundation vents aren’t directing humid air at duct seams. Accessibility varies by home. Call (361) 326-5060 for a free estimate.
We were called to a mid-century ranch near NE 96th Street and NE 2nd Avenue after the homeowner noticed a musty smell from the registers following a wet-season storm. Using a Rotobrush camera inspection with negative pressure and HEPA filtration, we found standing water in the return trunk and mold colonizing original galvanized joints; we performed source removal with agitation tools, sealed the leaking joints, and rebalanced the supply and return ducts so the air handler no longer pulled humid attic air into the living space.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Miami Shores since 2004.