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 Westwood Lakes
Duct sealing in Westwood Lakes typically runs $450 – $1,200 for a whole-home system, with most single-story ranch homes falling in the $550 – $850 range. We dispatch crews from our Miami office and usually book Westwood Lakes appointments within 2 – 3 business days, with written pricing confirmed before we touch your system. Call (361) 326-5060 for a free estimate.
We’ve worked in Westwood Lakes long enough to know the real problem isn’t just leaky ducts, it’s deciding whether those 1970s – 1990s flex-duct runs can even hold a seal after decades of tropical humidity and storm-driven attic moisture. Our technicians carry moisture meters and inspection cameras on every truck because in this ZIP code, sealing over saturated fiberglass liner is worse than doing nothing at all. That’s the difference between a crew that knows Westwood Lakes and one that treats your home like any other South Florida job.
Why Hollis Air Duct Cleaning Is Westwood Lakes’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004, and our Miami office dispatches crews who know the west Miami-Dade market cold. We don’t send techs to Westwood Lakes who’ve never pulled air handler panels in 1980s ranch homes with original flex duct buried under low attic insulation.
Our 365-Day Done Right Promise covers every duct sealing job in writing: if the seal fails or the moisture problem returns within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround. The price we write down before work starts is the price you pay. Period.
Every technician is background-checked, uniformed, and expected to operate under The Garrison Code: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
We use professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, the same tools commercial crews use on hospitals and schools. When we seal ducts in Westwood Lakes, we document the before condition with photos and moisture readings so you see exactly what we saw, and exactly what changed.
Duct Repair in Westwood Lakes
Duct Repair in Westwood Lakes usually means addressing storm-damaged or humidity-compromised flex-duct runs in 1970s – 1990s single-story homes where the fiberglass liner has separated from the mylar jacket or where rodent damage has opened the airstream to the attic. We see this most often after tropical systems push wind-driven rain through soffit vents, or during the June – November rainy season when attic humidity peaks and decades-old duct tape simply lets go.
A typical duct repair in Westwood Lakes runs $280 – $650 depending on how many runs are affected and whether we can access them through the attic or need to open ceiling sections. We always inspect with a camera first, then give you a written price before cutting or sealing anything.
When Repair Beats Replacement
We can repair isolated damage, a single disconnected collar, or a short section where the liner is intact but the jacket is torn. If the fiberglass insulation is dry and the biofilm hasn’t penetrated past the surface, we’ll patch with mastic and mechanical fasteners, then pressure-test the repair. This saves Westwood Lakes homeowners significant cost when the damage is truly localized.
When We Recommend Against Repair
If our moisture meter reads above 15% in the fiberglass liner, or if the camera shows black biofilm spreading through the insulation matrix, repair is a Band-Aid. Sealing or patching over saturated duct traps moisture and accelerates mold growth. We’ll show you the footage, explain why replacement is the only sound option, and document everything for your insurer.
Air Duct Sealing in Westwood Lakes
Air Duct Sealing in Westwood Lakes addresses the chronic leakage that plagues original or once-replaced flex-duct systems in this neighborhood’s ranch and Mediterranean-style tract homes. Sealing isn’t about slapping tape on visible joints. We pressure-test the entire system, locate leaks with smoke pencils and thermal imaging, then seal accessible joints and connections with mastic or aerosol sealant depending on duct condition and accessibility.
Whole-home air duct sealing in Westwood Lakes typically costs $450 – $1,200, with most homes in the $550 – $850 range. Homes with multiple attic access points and intact liner condition fall at the lower end. Systems with compromised liner, limited access, or post-storm moisture damage require repair or replacement first, then sealing.
Aerosol Sealing for Intact Systems
For Westwood Lakes homes with sound ductwork but chronic leakage at joints and collars, we use aerosol duct sealing technology that pressurizes the system and seals leaks from the inside. This reaches gaps behind walls and in tight attic spaces that manual sealing can’t touch. The sealant is non-toxic, UL-tested, and rated for residential HVAC systems. We verify results with before-and-after pressure tests.
Mastic Sealing for Accessible Joints
Where we can reach the ductwork directly, we brush on water-based duct mastic, a thick sealant that remains flexible and won’t degrade like foil tape in Westwood Lakes’s attic heat. We apply it to every joint, collar, and connection point, then mechanically reinforce high-stress areas. This method gives us visual confirmation of complete coverage that aerosol alone can’t provide.
Trusted Brands We Service in Westwood Lakes
Our trucks carry sealing and filtration products from Honeywell, Aprilaire, and Guardsman, plus professional-grade application equipment from Rotobrush and Nikro. We stock common flex-duct diameters and mastic compounds specifically for the 6-inch and 8-inch runs found in Westwood Lakes’s 1970s – 1990s housing stock. That means most repairs don’t wait on parts. If your system needs a component we don’t carry, our Miami office sources it fast, usually next-day for standard items. We don’t guess at compatibility or substitute generic parts. Every replacement matches your system’s specifications, and we show you the packaging before installation.
Common Duct Sealing Problems We See in Westwood Lakes Homes
- Sealing over saturated fiberglass liner after storm moisture intrusion. Tropical systems push wind-driven rain through soffit vents and ridge gaps, soaking the fiberglass insulation inside flex duct. Sealing traps that moisture. The biofilm keeps growing. We see this mistake most often when homeowners hire cleaners who don’t own moisture meters or inspection cameras.
- Aerosol sealant applied to undersized duct that can’t handle Westwood Lakes’s near-constant AC runtime. Forty-year-old 6-inch flex duct serving a 3.5-ton replacement air handler creates turbulent airflow and condensation. The sealant adheres poorly to wet metal. At the first humidity spike, it fails. We size the duct to the equipment before sealing, or we tell you honestly that sealing won’t solve the root problem.
- Treating musty registers as a cleaning job when the return duct is water-logged. The homeowner smells mold, calls for a $99 duct cleaning special, and the crew scrubs the supply side while ignoring a compromised return pullings attic air through saturated fiberglass. The smell returns in two weeks. We camera-inspect both supply and return before quoting any work.
- Ignoring the air handler cabinet and plenum in post-storm assessments. Water doesn’t stop at the duct. It pools in the plenum, corrodes the heat exchanger, and damages the blower motor. Our inspections include the entire air distribution system, not just the runs you can see from the attic hatch.
Pricing for Duct Sealing in Westwood Lakes, FL
Whole-home duct sealing in Westwood Lakes runs $450 – $1,200. Most single-story ranch homes with standard attic access fall between $550 – $850. Here’s what moves you within that range:
- Number of supply and return runs: more runs, more joints to seal
- Attic accessibility: tight low attitudes add labor time
- Duct condition: intact liner allows aerosol sealing; compromised liner requires repair first
- System size: larger homes with zoning or multiple air handlers
We do not quote per-vent pricing. We do not bait with a low teaser and add charges at the door. One flat price per system, agreed in writing, before any work starts. Every estimate includes a camera inspection and moisture reading so you know exactly what you’re paying for and why.
Call (361) 326-5060 for your free estimate. We’ll schedule at your convenience, send a uniformed technician who knows Westwood Lakes homes, and leave you with a written price you can compare without pressure.
We Also Serve Cities Near Westwood Lakes
Our Duct Sealing in Westwood Lakes crew is based from our Miami office and also handles jobs in Duct Sealing work across Jacksonville, Miami, Tampa, and Orlando. Each location operates independently under The Garrison Standard with the same written pricing, 365-Day Done Right Promise, and background-checked technicians.
Serving Westwood Lakes, FL - Our Local Coverage Area
We’re based in the Westwood Lakes 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 Westwood Lakes
You need a moisture reading and camera inspection of the fiberglass liner. If the liner reads below 15% moisture and the biofilm is surface-only, source removal cleaning with negative pressure and agitation tools can restore the duct. If the liner is saturated or the biofilm has penetrated into the insulation matrix, replacement is the only option that won’t trap moisture and accelerate mold growth. Call (361) 326-5060 and we’ll document the condition for your insurer while we’re there.
Westwood Lakes’s combination of 40-year-old fiberglass-lined flex duct, 90%+ year-round AC runtime, and hurricane-season attic humidity creates conditions that dry-climate ducts never face. The constant condensation inside the duct feeds microbial growth that forms a black biofilm on the liner surface. Dust alone is dry and gray. That black, musty coating is alive, and it pumps spores into your living space every time the system cycles. Call (361) 326-5060 for an inspection and honest assessment.
Duct sealing stops air leakage at joints and connections, but it cannot stop bulk water intrusion from roof leaks, soffit vent flooding, or wind-driven rain. If your attic has active water entry, sealing the ducts is step two. Step one is fixing the water source, then assessing whether the duct is salvageable. We document the difference so your insurer understands why sealing alone wasn’t the right call. Call (361) 326-5060 for a post-storm inspection.
We provide moisture meter readings with timestamps, dated camera footage of the duct interior, photos of the air handler and plenum condition, a written scope of work explaining why cleaning versus replacement was recommended, and itemized pricing. This package gives your adjuster the technical evidence to approve appropriate coverage rather than defaulting to the cheapest option. We prepare this on every storm-damage call at no extra charge. Call (361) 326-5060 to schedule.
It makes sealing less effective if the duct is undersized for the new air handler’s airflow. A 3.5-ton or 4-ton replacement unit forcing air through 6-inch flex designed for a 2.5-ton system creates turbulence, noise, and condensation that defeats any seal. We measure static pressure and airflow before sealing. If the duct is choking the equipment, we’ll tell you honestly that sealing the leaks won’t fix the performance problem. Sometimes the right call is duct replacement sized to the new system, then sealing the new runs. Call (361) 326-5060 for a pressure test and straight answer.
We were called to a single-story ranch off SW 40th Street near the Westwood Lakes canal after a late-season tropical system pushed wind-driven rain through a soffit vent; the homeowner found a musty smell coming from the registers in the back bedrooms. Our tech pulled the air handler panel, ran a camera inspection down the original 1980s flex runs, and found the last 12 feet of supply duct with saturated fiberglass liner and a black biofilm that had spread past the liner into the airstream. We documented the moisture reading, the camera footage, and the liner condition for the homeowner’s insurer, then did source removal with negative pressure and agitation tools on the salvageable runs and replaced the saturated section rather than sealing over it.
Westwood Lakes sits in a low-lying pocket of west Miami-Dade where the water table is high enough that attic duct runs in 1970s – 1990s ranch homes can wick ground-driven humidity even without a named storm making landfall. That means the post-storm question here is rarely “clean or don’t clean” – it’s whether the fiberglass-lined flex duct has already crossed from surface biofilm into saturated insulation that no amount of cleaning can save. Our moisture meters and inspection cameras answer that question with numbers and footage, not guesses. We show you the evidence, explain your options, and document everything for whoever needs to see it: you, your insurer, or your property manager. That’s The Garrison Standard. That’s how we work in Westwood Lakes.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Westwood Lakes since 2004.