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 Bay Harbor Islands
Bay Harbor Islands sits on two thin strips of land surrounded by salt water, and that geography shapes every service call we make here. We’re the Duct Sealing team at Hollis Air Duct Cleaning, and our crews dispatch from our Miami office to reach Bay Harbor Islands properties quickly. When you’re losing cooled air through corroded flex-duct collars or watching your energy bill climb because salt-damaged mastic has cracked open, you need someone who understands what this island climate does to ductwork. Call us at (361) 326-5060 for a free written estimate.
Why Hollis Air Duct Cleaning Is Bay Harbor Islands’s Preferred Duct Sealing Company
We’ve been sealing ducts across South Florida since 2004, and the Garrison Partners family of businesses built its reputation on showing up when we said we would and pricing in writing before any work starts. In Bay Harbor Islands, that discipline matters more than most places. The island’s tight building footprint means our technicians often work in cramped soffits and shared duct chases where sloppy work affects multiple units. Our crews arrive uniformed, background-checked, and equipped with professional-grade tools from Rotobrush and Abatement Technologies. The 365-Day Done Right Promise covers every job in writing: if our seal fails within a year, we return 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 Repair in Bay Harbor Islands
Duct Repair in Bay Harbor Islands means fixing the physical damage that salt air, humidity, and age inflict on a system before sealing can even begin. Most calls we get from the island involve corroded metal connectors, separated flex-duct runs that have pulled away from plenums, or return grilles that have literally rusted through. Because so many Bay Harbor Islands homes and condos were built in the 1950s and 1960s with original thin-wall ductwork, repair is often the necessary first step before any sealing work can hold. A typical duct repair project in Bay Harbor Islands runs $280 – $520 for standard residential work, with larger condo systems or jobs requiring access through finished ceilings running higher.
Corroded Collar Replacement
Supply and return collars in Bay Harbor Islands take a beating from salt-laden air that mainland ducts never see. We replace rusted or separated collars with galvanized or stainless-steel hardware rated for coastal exposure, then seal with mastic formulated for high-humidity environments.
Flex-Duct Reconnection
Original flex runs in older island condos often sag, kink, or pull completely free from their boots. Our technicians support new flex properly with strapping and seal every joint with UL-181 tape and mastic, not duct tape that will fail in six months.
Air Duct Sealing in Bay Harbor Islands
Air Duct Sealing in Bay Harbor Islands closes the gaps, cracks, and separations that let your conditioned air escape into hot attics, humid garages, and wall cavities. On the island, sealing is rarely a simple matter of brushing mastic over a few joints. Salt corrosion opens new leak paths constantly, and the high humidity means any air leakage pulls moisture into the system that feeds mold growth. We seal with professional-grade mastic compounds and reinforced mesh, applied to clean, prepped surfaces so the bond actually holds. A typical residential duct sealing job in Bay Harbor Islands costs $450 – $890 depending on system size and accessibility, with whole-condo systems running $1,100 – $1,800. Every price is written down before we start.
Mastic Application and Reinforcement
We brush or trowel fiber-reinforced mastic onto every joint, seam, and penetration. In Bay Harbor Islands’s salt-air environment, we use compounds rated for coastal HVAC applications that flex with thermal expansion instead of cracking.
Pressure Testing After Sealing
After sealant cures, we run a duct-blaster or pressure test to verify results. You’ll see the before-and-after numbers in writing. If the system still leaks above industry standards, we find the missed spots and reseal at no extra charge.
Trusted Brands We Service in Bay Harbor Islands
Hollis technicians carry parts and sealing products from Aprilaire, Abatement Technologies, and Guardsman on every Bay Harbor Islands service vehicle. We stock galvanized collars, coastal-grade mastic, and reinforced mesh tape specifically for salt-air environments, so most jobs don’t wait on parts. Our equipment roster includes Rotobrush rotary systems for pre-cleaning duct surfaces before sealant application, ensuring mastic bonds to metal and flex rather than dust and corrosion scale. When we arrive at your Broadview or East Island property, we come prepared to complete the work in one visit.
Common Duct Sealing Problems We See in Bay Harbor Islands Homes
- Salt-corroded register boots. Supply and return boots facing the Intracoastal or Biscayne Bay develop a white salt film that pits the metal. Once pitted, the surface won’t hold sealant without proper prep or replacement.
- Separated flex in humid soffits. Ducts running through unconditioned soffits between stacked condos absorb moisture, sag, and pull away from connections. The leak is hidden until your energy bill spikes or mold appears on ceiling tiles.
- Shared chase contamination. In mid-rise condos along Kane Concourse, vertical duct chases carry air between floors. A leak in one unit pulls fiberglass, pest debris, or mold spores from neighbors into your supply.
- Original mastic turned to powder. Fifty-year-old duct systems in the island’s older buildings were sealed with compounds that degrade in high humidity. We scrape off the crumbles and start fresh with modern, flexible sealants.
Pricing for Duct Sealing in Bay Harbor Islands, FL
Honest pricing starts with honest ranges. In Bay Harbor Islands, a standard single-family or townhouse duct sealing job typically runs $450 – $890. Whole-system sealing for larger condos or multi-zone systems runs $1,100 – $1,800. If repair work is needed first, add $280 – $520 for collar replacement, flex reconnection, or boot repair. What moves the needle: system size, how many ducts run through inaccessible soffits or garages, whether we need to protect finished surfaces during access, and if pre-cleaning is required for sealant to bond. We do not quote per-vent teaser prices that balloon at the door. The price we write down before work starts is the price you pay. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Bay Harbor Islands
Our Duct Sealing in Bay Harbor Islands crew is part of a larger South Florida operation that also handles jobs in Miami proper, and we coordinate with teams serving Jacksonville, Tampa, and Orlando for larger commercial projects. Scheduling and dispatch for Bay Harbor Islands runs through our Miami office, with local crews who know the island’s building stock and access challenges.
Serving Bay Harbor Islands, FL - Our Local Coverage Area
We’re based in the Bay Harbor Islands 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 Bay Harbor Islands
We typically schedule Bay Harbor Islands appointments within two to four business days, with our Miami-based crews crossing the Broad Causeway or Julia Tuttle Causeway to reach the island. Call (361) 326-5060 to check current availability.
Yes, we seal ducts across the entire island, from the original Broadview section west of the Intracoastal to the East Island townhomes and condos along Kane Concourse and surrounding streets. The building type varies by area, and our technicians adjust their approach accordingly.
Duct sealing is scheduled work, not an emergency dispatch. However, if a separated duct is flooding your unit with humid outside air or you smell mold from a leaking return, we prioritize those calls within our next available window. Our phones are answered by a live person 24/7 to assess urgency.
Bay Harbor Islands pricing runs roughly comparable to Miami Beach and Surfside, sometimes slightly higher when access requires protecting finished interiors in tight condo layouts. The salt-air environment also means we use more expensive coastal-grade materials. We still provide written, flat pricing before any work begins.
Every duct sealing job is backed by our 365-Day Done Right Promise in writing. If the seal fails, leaks reopen, or any covered issue returns within one year, Hollis returns and makes it right at no charge, including a free second visit. This applies to all Bay Harbor Islands properties we service.
We also handle Air Duct Cleaning in Bay Harbor Islands and Dryer Vent Cleaning in Bay Harbor Islands for homeowners who want their full system addressed in one visit.
Ready to stop losing cooled air to your attic and walls? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free, written estimate on duct sealing in Bay Harbor Islands. We’ll inspect your system, explain what we find, and give you a flat price before any work starts. No per-vent games, no surprises at the door.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Bay Harbor Islands and South Florida since 2004.