Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Fast, Reliable Duct Sealing Across Southern Highlands
Duct sealing in Southern Highlands typically runs $450 – $1,200 per system, depending on how many systems your home has and how much of the ductwork is accessible. Most jobs here involve larger custom homes with long runs, which is why we price by the system, in writing, before any work starts. If you’re noticing dusty furniture days after cleaning, uneven room temperatures, or rooms that never quite reach the thermostat setting, the ducts are the first place to look. Our crews serve Southern Highlands from the brand’s Las Vegas office, which means we can be at your door quickly with the right equipment. Call (775) 383-5847 and we’ll give you a straight answer.
Why Hollis Air Duct Henderson Is Southern Highlands’s Preferred Duct Sealing Company
Southern Highlands homes are not like the rest of the valley. The lots are bigger, the homes are custom or semi-custom, and the duct systems run long and complicated through attics, chases, and finished walls. That’s exactly the kind of work Hollis Air Duct Henderson is built for. We’ve sealed systems in every corner of this community, from the estates off Stone Canyon Avenue to the gated enclaves west of Jones Boulevard. Homeowners here tell us the same thing: they want a crew that shows up on time, gives a written price, and documents the work. That is The Garrison Code, and it’s how every one of our background-checked, uniformed technicians operates on a Southern Highlands job.
Roy Castellanos leads the team, and the standard he holds is simple: arrive inside the quoted window, price it before you touch it, do the work by the book, and leave the site clean. The 365-Day Done Right Promise backs every sealing job in writing. If a sealed joint fails within a year, we come back and fix it at no charge. That’s not a vague satisfaction line. It’s what we actually do. When you live in Southern Highlands, you expect a certain level of service from anyone who works in your home. We meet it.
Styles & brands we work with
Duct Sealing Services in Southern Highlands
Duct Sealing Services in Southern Highlands start with a camera inspection of the accessible runs, because you can’t seal what you can’t see. We look for failed tape, separated joints, pinholes, and gaps where the duct connects to the plenum or registers. Once the leaks are mapped, we clean the surfaces so the sealant bonds, then apply mastic (a thick brush-on compound designed for HVAC seams) to every identified failure point. In Southern Highlands, sealing matters more than in newer subdivisions: the long, multi-bend runs in custom homes mean more joints, and more joints mean more places for air to escape before it reaches a bedroom on the far side of the house.
Supply and Return Sealing
We seal both sides of the system. Supply leaks are the ones pushing conditioned air into your attic, which is why a room upstairs never cools while the hallway does. Return leaks pull unfiltered attic air into the system, and in Southern Highlands, that attic air carries fine desert dust and insulation fibers. Both need attention, not just the accessible trunk line.
Plenum and Branch Joint Sealing
Most of the leakage in larger Southern Highlands homes happens where branch lines tie into the main trunk, and where the trunk meets the plenum. We open the plenum where accessible, seal those connections properly, and then move down the line to each branch takeoff. Skipping the branches is how you end up with a sealed trunk and still-dusty bedrooms. We don’t skip them.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Duct Insulation in Southern Highlands
Duct Insulation in Southern Highlands is not an afterthought; it’s part of the sealing job. When ducts run through an attic that hits 140 degrees in July, conditioned air loses temperature to the attic before it ever reaches the room. We reinsulate sealed sections, repair torn or compressed wrap, and wrap exposed plenums so the air leaving your system stays the temperature it’s supposed to be. In a Southern Highlands home with a tile roof and a high-ceiling second floor, a poorly insulated duct run is the difference between a room that cools and one that just circulates warm air. Expect $250 – $500 to reinsulate a plenum and accessible trunk sections, depending on length and condition.
Attic Duct Wrap Repair
Years of Southern Highlands heat cycles cause duct wrap to tear, slip, or compress. Once the insulation is compromised, condensation can form on the cold duct surface in summer, and that moisture attracts dust. We remove the damaged wrap, check for corrosion or leaks underneath, and rewrap with the correct R-value insulation.
Plenum Reinsulation
The plenum sits right at the air handler and takes the most heat abuse if it’s in an unconditioned attic. A sweaty or warm plenum tells you the air is losing energy the moment it leaves the unit. We strip, seal, and reinsulate it so the system starts every cycle with air at the temperature your thermostat asked for.
Trusted Brands We Service in Southern Highlands
We work on every major residential HVAC brand found in Southern Highlands homes, including Carrier, Trane, Lennox, Rheem, and Goodman. We also stock common filter sizes and sealant materials from Honeywell and Aprilaire, which means when your ducts need filter-housing sealing or a fresh media cabinet gasket, we have the part on the truck, not ordered in. Our sealing work uses professional-grade mastic, UL 181-rated tapes, and the same negative-air equipment from Nikro that commercial crews run. You won’t find hardware-store duct tape in our kit, because hardware-store duct tape is not rated for HVAC and fails in a Southern Highlands attic within two summers.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Southern Highlands Homes
- Failed tape at long, multi-bend runs. Custom homes here were built with elaborate duct paths to feed high-ceiling rooms and second stories. Every bend is a joint, and every joint is a potential leak. Camera inspection is the only way to find separation behind finished walls without tearing drywall.
- Sealing done without source removal first. This is a big one. Some crews seal over dirty surfaces, and the ‘Highlands powder’ gets trapped behind the new sealant. It keeps eroding the mastic from underneath, and the seal fails. We clean the surface before we seal, every time.
- Sealing only the accessible trunk line. If the attic branches are skipped, high-ceiling rooms stay uneven and dust settles in rarely used spaces. A partial seal is a partial fix, and partial fixes don’t hold up to a Southern Highlands summer.
- Plenum separation at the air handler. The connection between the unit and the duct system takes the most vibration. Over years, mounting hardware loosens and the plenum pulls away, dumping conditioned air into the attic. We torque and seal that connection as a standard part of every job.
Pricing for Duct Sealing in Southern Highlands, NV
A typical single-system duct sealing job in Southern Highlands runs $450 – $700 for accessible attic and garage runs, including camera inspection and mastic application. Homes with two systems (common in larger estates on the western edge) fall in the $800 – $1,200 range when both systems are sealed and reinsulated. What moves the number is access: finished attics, tight chases, and long runs above finished ceilings require more time to reach and reseal. You get a written price before any work starts, and that price does not move at the door. Call (775) 383-5847 for a free estimate. We’ll look at your system, tell you what it needs, and put the number in writing.
We Also Serve Cities Near Southern Highlands
Hollis Air Duct Henderson handles Duct Sealing throughout Southern Highlands and the surrounding area, including Henderson, Paradise, Boulder City, and Nellis AFB. If you’re just outside the community line, you still get the same written pricing and the same 365-Day Done Right Promise. The equipment, the technicians, and the standard don’t change based on the zip code.
Serving Southern Highlands, NV - Our Local Coverage Area
We’re based in the Southern Highlands 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 Southern Highlands
Southern Highlands homes were mostly built from the late 1990s through the 2010s with custom or semi-custom layouts, and that means longer duct runs with more joints per system. Long runs flex with temperature swings, and the tape or mastic at each connection point degrades faster than it does on a shorter, straighter run in a newer tract home. After 15 – 25 years, it’s common to find separation at a third of the joints in a typical Southern Highlands attic. The other factor is the fine dust that settles on and inside the ductwork, which breaks down sealant adhesion over time.
‘Highlands powder’ is the talcum-fine dust that accumulates in ducts along the western edge of Southern Highlands, near the mountain preserve. It’s a mix of desert silt and pollen from the eucalyptus and pine trees planted throughout the community, and it’s fine enough to work its way through failing seams and settle along long duct runs. It affects sealing because any dust left on a surface before mastic is applied prevents a proper bond. That’s why surface preparation matters as much as the sealant itself. Cleaning before sealing is not optional on a Southern Highlands job.
Yes. Every sealing job includes before-and-after camera photos of the identified leak points and the sealed seams, plus a written summary of what was found and what was done. You don’t have to take anyone’s word for work you can’t see in your own attic. If you want to walk the attic with us afterward, we encourage it. For a blower-motor static pressure check or register-by-register airflow verification, we can include that too. Call (775) 383-5847 and ask for the documentation ahead of time so it’s built into your written quote.
Most Southern Highlands homes have one system for smaller or older builds. Larger estates, especially those above 4,000 square feet with two-story layouts, often run two or even three separate systems with independent trunks, plenums, and branch runs. That matters for cost because each system is priced separately. Sealing one system is one price; sealing three is three times the work, three times the material, and three times the inspection. We quote per system, in writing, so you know the total before the first tool comes out.
Often yes, and especially in Southern Highlands where fine dust is constantly finding its way into the system. If your return ducts are leaking, the system pulls attic air, insulation fibers, and ‘Highlands powder’ into the air stream, and that’s what lands on your furniture. Sealing return leaks cuts off the source, and sealing supply leaks keeps your conditioned air going where it belongs instead of pushing dust through wall cavities and into rooms. If the dust keeps returning after a seal, the next step is usually a full duct cleaning to remove whatever accumulated before the system was sealed. Call (775) 383-5847 for an inspection and a straight answer.
Written by Roy Castellanos, Owner at Hollis Air Duct Henderson, serving Southern Highlands and the surrounding valley.