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 Royal Palm Beach
Duct sealing in Royal Palm Beach typically runs $450 – $1,200 for a whole-home system, and most jobs are completed in a single visit with the price written before we start. We’re the Duct Sealing team at Hollis Air Duct Cleaning, and we serve Royal Palm Beach from our Miami-area dispatch office with crews that know the local housing stock, the subtropical climate, and what actually fails here versus what fails up north. If your ducts are leaking conditioned air into a 140°F attic or pulling humidity and sugar sand back into your blower, you’re paying for cooling you never feel. Call (361) 326-5060 for a free estimate with a written price that doesn’t move at the door.
Why Hollis Air Duct Cleaning Is Royal Palm Beach’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our crews have sealed ducts in the master-planned communities off Southern Boulevard and the older ranch homes along Okeechobee Boulevard enough times to know the difference between a Madison Green villa built in 2005 and a 1980s CBS ranch with original flex duct. Royal Palm Beach homeowners don’t need a sales pitch; they need a crew that shows up uniformed, background-checked, and on time, explains what the camera inspection found, and writes the price down before touching anything.
Our 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. No negotiation, no runaround. Phones are answered by a live person 24 hours a day, 7 days a week, so you’re not leaving voicemail when your ceiling starts dripping in July.
We dispatch and schedule from our Miami (South FL) office, but the crews that reach Royal Palm Beach are local to the area and carry the equipment to finish most residential systems same-day. That’s the Garrison Standard: arrive inside the window, price in writing, complete the job by the book, leave the site clean.
Duct Insulation in Royal Palm Beach
Duct Insulation in Royal Palm Beach is usually about stopping condensation and thermal loss in attic flex duct that bakes at 140°F or higher, then gets soaked by afternoon rains from May through October. The insulation itself is a fiberglass or foam wrap applied to the exterior of metal or flex duct, but in this market the real problem is often that existing insulation has compressed, torn, or gotten wet from sagging duct runs, so the cold supply air hits humid attic air and sweats onto your ceiling. We see this in Counterpoint Estates and Madison Green homes where the original builder-grade wrap has deteriorated after fifteen or twenty years of heat cycling. A typical duct insulation job in Royal Palm Beach runs $600 – $1,800 depending on linear footage and accessibility.
When Attic Heat Destroys Insulation
The R-value of fiberglass wrap drops sharply when it’s compressed or moisture-laden, and in Royal Palm Beach attics that happens faster than almost anywhere else in the country. We measure the actual thermal performance with an infrared gun and replace only what’s failed, rather than wrapping over wet material that traps mold.
Vapor Barriers That Actually Work
A proper vapor barrier faces the correct direction for our climate: toward the conditioned air stream, not the attic. We’ve found backwards-installed barriers in homes near Okeechobee Boulevard that were essentially funneling condensation into the duct liner for years. We correct the orientation and seal the seams with mastic, not duct tape.
HVAC Duct Sealing in Royal Palm Beach
HVAC Duct Sealing in Royal Palm Beach means closing the leaks at plenum collars, boot connections, and seam joints that let your conditioned air escape into the attic and pull humid, sandy return air back through the system. In this market, the leaks are usually caused by thermal cycling: mastic and foil tape that was applied in a cooler season dries and cracks after years of 140°F-plus attic exposure, then the May – October rainy season drives humidity through the gaps. A typical HVAC duct sealing job in Royal Palm Beach costs $450 – $1,200 for a whole-home system, with larger homes or complex attic runs toward the higher end. We use mastic application under negative-air containment with HEPA filtration at the outlet, so we’re not blowing debris into your living space while we work.
Negative-Air Containment During Sealing
We pull the system under negative pressure with a Nikro machine while applying fresh mastic, which means any disturbed particulate gets captured at the source instead of circulating through your bedrooms. This matters in Royal Palm Beach where sugar sand and construction dust are already packed into return pathways.
Pressure Testing After the Seal
We verify the work with a duct blaster or static pressure test, depending on the system. A sealed duct run should hold pressure without the blower compensating for leaks. We show you the before and after numbers, and we don’t leave until the system meets the standard we quoted.
Trusted Brands We Service in Royal Palm Beach
Our trucks stock parts and materials from Aprilaire, Abatement Technologies, and Guardsman, plus mastic and sealants rated for the thermal stress of South Florida attics. For Royal Palm Beach homeowners, that means no waiting on a parts run to Miami when a boot connection or plenum collar needs replacement during the sealing process. We carry Rotobrush rotary systems for the cleaning phase that should precede any seal on a dirty duct, and we size Aprilaire filtration upgrades to match the airflow of your newly sealed system. If your return grille is choked with sugar sand from nearby equestrian properties or new construction, we’ll show you the buildup on camera and clean it before we seal, because sealing over a dirty duct just traps the problem.
Common Duct Sealing Problems We See in Royal Palm Beach Homes
- Mastic cracks at the plenum collar from thermal cycling. In Royal Palm Beach attics that hit 140°F or higher, the mastic applied at the air handler plenum dries and splits within five to ten years, reopening leaks that pull humid attic air directly into your supply stream. We scrape the old material and apply fresh mastic rated for continuous high-heat exposure.
- Sagging flex duct collecting condensation during rainy season. The May – October afternoon rains cool attic surfaces while your AC runs, and sagging low points in flex duct become drip trays. Sealing over a wet duct traps moisture; we support the sag and dry the run before sealing.
- Return grilles packed with sugar sand and construction dust. Fine coral-sand grit from equestrian properties and ongoing subdivision build-out chokes airflow at the return, so the blower works harder and the duct leaks matter more. Source removal comes first, then sealing.
- Boot separations at ceiling penetrations. The thermal expansion of CBS and stucco construction in Royal Palm Beach’s heat cycles can loosen the connection between duct boots and drywall, creating gaps that leak conditioned air into wall cavities. We re-secure and seal with mastic and mechanical fasteners.
Pricing for Duct Sealing in Royal Palm Beach, FL
Whole-home duct sealing in Royal Palm Beach typically runs $450 – $1,200, and duct insulation runs $600 – $1,800. What moves you within that range: linear footage of ductwork, accessibility (crawled attic versus walkable), whether we need to support or replace sagging flex runs, and whether the job includes the cleaning phase that should precede sealing on dirty systems. We do not quote per-vent teaser prices that balloon once the technician is inside. The price is written down before any work starts, and it does not move at the door. Every estimate is free, and every sealed system carries our 365-Day Done Right Promise in writing. Call (361) 326-5060 for an exact quote on your Royal Palm Beach home.
We Also Serve Cities Near Royal Palm Beach
Our crews work throughout the western Palm Beach County corridor, including Royal Palm Beach and neighboring Wellington, Greenacres, Palm Beach Gardens, and West Palm Beach. The same Garrison Standard applies at every stop: written price, written guarantee, background-checked uniformed technicians, and a live person on the phone whenever you call.
Serving Royal Palm Beach, FL - Our Local Coverage Area
We’re based in the Royal Palm 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 Royal Palm Beach
It stops the moisture source that feeds mold, but it does not kill existing growth. Sealing closes the leaks that pull 70 – 90% humidity into your duct runs during our May – October rainy season, which is what lets mold colonize in the first place. If your ducts already have visible microbial growth, we clean with rotary brush and negative-air methods first, then seal. Call (361) 326-5060 and we’ll camera-inspect to tell you which phase you actually need.
Your cold supply air is hitting humid attic air through gaps in insulation or at unsealed boots, and the condensation forms on the duct exterior. In Royal Palm Beach, this happens most in homes with original flex duct in vented attics, especially after years of 140°F heat cycling that compresses or tears the insulation wrap. We seal the leaks, replace failed insulation, and support any sagging runs that collect standing water. Call (361) 326-5060 for a free inspection.
Up north, duct sealing is mostly about winter heat loss and seasonal dust. In Royal Palm Beach, it’s about year-round humidity intrusion, coral-sand grit from our equestrian and agricultural surroundings, and thermal destruction of mastic and tape in 140°F attics. The failure modes are different, so the materials and methods need to match. We use high-temp mastic and proper vapor barrier orientation that northern crews rarely encounter.
A sealed duct system can handle MERV 11 – 13 without overworking the blower, which is enough to capture the fine sugar sand and pollen that blow through Royal Palm Beach. Before sealing, high MERV filters often starve the system because the blower is already compensating for leaks. We measure static pressure after sealing and recommend the right Aprilaire or Guardsman filter for your specific airflow. Call (361) 326-5060 and we’ll size it to the system.
No, not as a standalone fix. Fogging coats surfaces temporarily but does not remove the source material that mold feeds on, and in Royal Palm Beach’s humidity, growth returns within months if the moisture source isn’t sealed. A genuine seal-and-clean addresses the actual problem: we remove the buildup with rotary brush and negative-air methods, seal the leaks that let humidity back in, and verify with camera and pressure testing. The fogging upsell is revenue for the company, not protection for your home.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Royal Palm Beach since 2004 as part of the Garrison Partners family.