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 Las Vegas
Duct sealing in Las Vegas typically runs $450 – $1,200 for a whole-house seal, depending on whether we’re patching flexduct tears in a Summerlin attic or rebuilding crushed metal trunk lines in a 1960s Huntridge ranch. Most Las Vegas homeowners see their utility bills drop 15 – 25% once the conditioned air stops bleeding into 140°F attics or under slab patches. Call (361) 326-5060 and we’ll give you a written price before any work starts.
We’ve been crawling Las Vegas attics since 2004. Our dispatch and scheduling run from our local Las Vegas office, and our crews know the difference between a 1990s Summerlin tract home with flexduct sagging at the plenum and a 1950s Downtown ranch with original metal duct crushed under a slab patch from a long-ago remodel. That local housing knowledge changes what we bring on the truck and how we price the job. The Garrison Standard means we arrive inside the quoted window, price in writing, and leave the site clean.
Why Hollis Air Duct Cleaning Is Las Vegas’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning carries the 365-Day Done Right Promise on every duct sealing job in Las Vegas: if the seal fails or the airflow problem returns within a year, we come back and make it right at no charge, including a free second visit. That’s written on every invoice, not mentioned verbally and forgotten.
Our technicians are background-checked, uniformed, and expected to operate under The Garrison Code: introduce themselves at the door, explain what they’ll do before they touch anything, and show you the photos. We use professional-grade equipment from Rotobrush and Nikro, plus sealing materials and filtration products from Abatement Technologies and Guardsman. These are the same tools commercial HVAC crews use on casino and hospital jobs, not hardware-store caulk guns.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule. When you call (361) 326-5060, you talk to someone who can book your Las Vegas appointment and tell you what the technician will bring.
HVAC Duct Sealing in Las Vegas
HVAC Duct Sealing in Las Vegas is less about energy efficiency on a brochure and more about keeping a 4- or 5-ton AC system from hemorrhaging cooled air into a 140°F attic while the homeowner pays $400+ summer power bills. The job involves pressurizing the duct system to find leaks, then sealing accessible joints, plenum connections, and damaged runs with mastic and mesh or mechanical fasteners. In Las Vegas’s climate, we often find that the real problem isn’t one big hole but dozens of small leaks at flexduct sag points or original metal trunk seams that have worked loose after decades of thermal expansion.
A typical whole-house duct sealing in Las Vegas runs $450 – $850 for flexduct repairs in accessible attics, and $800 – $1,200 when we’re rebuilding or re-supporting crushed metal trunk lines in older homes. Every price is written down before we start.
When Sealing Beats Replacement
Not every leaking duct needs to be torn out. In Summerlin and Henderson tract homes built 1990 – 2020, flexduct often tears at the plenum or sags at support straps. We can re-support the run, patch the tear, and seal the connection for a fraction of replacement cost. The key is identifying whether the damage is localized or if the entire run has degraded from UV exposure in a baking attic.
Monsoon Season Complications
After July through September dust storms, fine caliche dust coats duct interiors. We clean before we seal. Sealing a dirty duct traps that grit, and the next humid spell (rare but real) can cement it to the coil. Our Duct Sealing team uses source removal under negative pressure with HEPA filtration first, then seals.
Duct Repair in Las Vegas
Duct Repair in Las Vegas often starts with a homeowner complaint that sounds like an equipment problem: “My new AC can’t hold 78°F.” We arrive to find a 5-ton condenser connected to ductwork sized for a 3-ton evaporative cooler, or a flexduct run that’s completely detached and blowing $12,000 worth of cooled air into the attic. Repair means more than slapping tape on a joint. It means diagnosing whether the system can move enough air for the load, then fixing what’s actually broken.
Duct repair in Las Vegas ranges from $300 – $600 for reconnecting and sealing detached branch runs, to $900 – $1,500 when we’re rebuilding a crushed metal trunk or replacing a degraded flexduct main. We photograph everything before and after.
Crushed Metal Trunk Lines
In Huntridge and Downtown ranches, we regularly find original 1950s – 70s metal duct crushed under slab patches from bathroom or kitchen remodels. The homeowner never knew. We cut access, rebuild the trunk with proper gauge metal, seal with mastic and mesh, and restore airflow. Static pressure readings before and after tell the story.
Disconnected Branch Runs
Flexduct in Las Vegas attics can pull loose from collars during monsoon wind gusts that rock rooftop equipment, or from decades of thermal cycling. A disconnected branch run doesn’t just waste air; it creates negative pressure that pulls 140°F attic dust into the return. We reconnect, support, and seal.
Trusted Brands We Service in Las Vegas
We stock sealing materials and filtration products from Abatement Technologies and Guardsman for Las Vegas customers, plus we run Rotobrush rotary brush systems and Nikro negative-air machines for the cleaning that precedes sealing. Local inventory matters here. When a July dust storm hits and half of Summerlin is calling about dropped airflow, we don’t wait a week for parts. Our Las Vegas warehouse carries mastic, mesh, mechanical fasteners, and replacement flexduct in standard diameters. Turnaround on most duct sealing jobs is same-week, and we schedule the cleaning and sealing as one coordinated visit so you’re not taking two days off work.
Common Duct Sealing Problems We See in Las Vegas Homes
- Original metal duct undersized for modern AC. In Huntridge and Downtown, 1950s – 70s ranches have metal trunks sized for evaporative coolers. When a later homeowner straps on a 4- or 5-ton AC, the static pressure skyrockets and air squeals through every loose joint. Sealing the leaks helps, but sometimes we also need to modify the trunk or add a return path.
- Flexduct sag and tear in 140°F attics. Summerlin and Henderson tract homes run flexduct through attics that hit 140°F+ in August. The insulation jacket degrades. The inner liner tears at sag points. We re-support with proper straps, replace damaged sections, and seal every connection.
- Monsoon dust infiltration through leaks. After a July dust storm, the “Summerlin filter effect” kicks in: fine caliche dust gets pulled into return-air chases through gaps we can fit a finger through, then cakes the evaporator coil. Sealing without cleaning first traps that grit permanently.
- Slab-crushed trunk lines from old remodels. A 1970s bathroom addition in a Huntridge ranch often meant pouring a patch over the original metal duct. Forty years later, that trunk is flattened to half its diameter. We cut, rebuild, and seal.
Pricing for Duct Sealing in Las Vegas, NV
Whole-house duct sealing in Las Vegas runs $450 – $1,200. Here’s how that breaks:
| Scope | Price Range |
|---|---|
| Flexduct seal/repair, accessible attic, single system | $450 – $650 |
| Metal trunk seal with mastic/mesh, multiple joints | $600 – $850 |
| Crushed trunk rebuild + seal (Huntridge/Downtown older homes) | $800 – $1,200 |
| Disconnected branch runs (reconnect + seal, 2 – 3 runs) | $300 – $600 |
What moves the price: attic accessibility, whether we need to cut drywall or slab access, and whether the job requires cleaning before sealing. We do not quote per-vent or per-square-foot. One flat price per system, agreed in writing before work starts. Every Las Vegas job includes before-and-after photos of your actual ducts, not stock images. Call (361) 326-5060 for a free estimate; we’ll inspect, photograph, and write the price on the spot.
We Also Serve Cities Near Las Vegas
Our Las Vegas crews run regular routes to Duct Sealing in Las Vegas metro area homes in North Las Vegas, Nellis AFB, Henderson, and Boulder City. Same written pricing, same 365-Day Done Right Promise, same live-answer scheduling. Dispatch is coordinated from our Las Vegas office, so Henderson and North Las Vegas appointments book on the same calendar with the same technicians.
Serving Las Vegas, NV - Our Local Coverage Area
We’re based in the Las Vegas 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 Las Vegas
It probably needs both. In 12-year-old Summerlin tract homes, we find flexduct tears at the plenum and sag points where 140°F attic heat has degraded the inner liner. Cleaning alone leaves those leaks open, so dust returns within a season. Sealing alone traps existing grit. We inspect with a camera and quote both if both are needed. Call (361) 326-5060 and we’ll show you the photos before you decide.
We can often seal and salvage it. Original 1950s – 70s metal duct in Huntridge was sized for evaporative coolers, so sealing leaks helps but won’t fix an undersized trunk. We pressure-test to measure static pressure, then seal what’s sealable and flag what needs modification. Full replacement is rarely the only option. The written quote separates seal work from rebuild work so you choose.
We measure before and after. Our technicians take room-by-room temperature splits and static pressure readings before sealing, then return to verify after. The 365-Day Done Right Promise covers Las Vegas homes specifically: if your AC still can’t hold setpoint after we’ve sealed, we come back and find what we missed at no charge. That promise is written on your invoice.
Las Vegas’s extreme dryness and 140°F attic heat change everything. Mastic cures faster here, which is good, but flexduct degrades faster from UV and thermal cycling, which is bad. Dust stays airborne rather than clumping, so leaks pull more debris into the system. And monsoon wind gusts physically rock rooftop equipment, loosening connections that stay put in humid climates. Our sealing methods account for all three.
We clean dryer vents and can replace degraded vent runs, but we don’t “seal” them in the same sense as HVAC ductwork. A dryer vent needs to exhaust freely, not be airtight. If your vent is disconnected, crushed, or routed with improper materials, we rebuild it to code with proper gauge duct and secure connections. Ask about bundling dryer vent service with your duct sealing appointment.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Las Vegas since 2004.