Duct Sealing in Dallas - Leakage Measured, Then Priced in Writing

Fast, Reliable Duct Sealing Across Dallas

Duct sealing in Dallas runs between $1,800 and $3,400 for a typical single-family home, depending on how much of the ductwork is accessible and how badly the existing seals have failed. That’s the honest range we quote before anybody shows up at your door. Hollis Air Duct Dallas has sealed duct systems from Lake Highlands to Casa View, and we know exactly what this city’s heat and housing stock do to ductwork. If your energy bills creep up every July and some rooms never seem to cool, leaking ducts are usually part of the story. Call (361) 309-6223 and we’ll give you a written price before any work starts.

Call (361) 309-6223

Why Hollis Air Duct Dallas Is Dallas’s Preferred Duct Sealing Company

We’ve worked in enough Dallas homes to know that no two duct systems fail the same way. A 1968 ranch in Casa View has different problems than a 1992 two-story in Richardson. That local experience matters because duct sealing is not a guess-and-go job. It means knowing where Dallas homes typically leak, what the attic heat does to mastic over five or ten summers, and what a pier-and-beam foundation means for ducts running under the house.

Every technician who shows up at your Dallas home is background-checked and uniformed. You’ll know who’s walking through your door before they arrive. We answer our phones with a live person around the clock, so when you call (361) 309-6223, you’re talking to someone who can actually help, not a voicemail queue. Roy Castellanos leads the Dallas crew, and he holds every job to The Garrison Code: arrive inside the window, price it in writing, do the work by the book, and leave the site clean.

The 365-Day Done Right Promise backs every sealing job. If a sealed joint fails within a year, we come back and fix it at no charge. That includes a free second visit. Nobody in Dallas should pay twice for the same repair, and with us, you won’t.

Duct Insulation in Dallas

Duct insulation in Dallas is the difference between paying to cool your attic and paying to cool your living room. When ducts run through unconditioned spaces like attics or crawl spaces, and Dallas homes have plenty of both, uninsulated or poorly insulated ducts lose a significant portion of the conditioned air before it ever reaches a register. We wrap ducts with insulation rated for our climate, then seal every seam so the insulation actually does its job. For a typical Dallas home, expect to pay $900 to $2,200 depending on duct footage and accessibility.

Attic Duct Wrap and Seal

Dallas attics hit 130 degrees or more in August. Bare metal ducts in that environment sweat, and that condensation breeds mold and rust. We apply closed-cell insulation wrap over sealed ductwork, which stops both the energy loss and the condensation problem at the source. This is the single most common insulation job we do in Dallas, and it pays for itself faster than most homeowners expect.

Crawl Space Duct Insulation

Homes with pier-and-beam foundations, and there are thousands of them in Dallas, run ducts through the crawl space. In summer that space is humid, and in winter it’s damp and cold. Uninsulated ducts down there lose conditioned air year-round. We use moisture-resistant insulation rated for below-floor installation, then seal the duct joints so the air you paid to condition stays inside the system.

HVAC Duct Sealing in Dallas

HVAC duct sealing in Dallas addresses the leaks that quietly drain your system’s efficiency. The average Dallas home loses 20 to 30 percent of its conditioned air through duct leaks, which means you’re running your AC extra hours every single day just to keep the thermostat satisfied. Sealing stops that waste at the seams, joints, and connections. Depending on the size of the system and number of accessible ducts, a full sealing job in Dallas typically runs $1,800 to $3,400, and the job is usually done in a single day.

Mastic Sealing for Metal Ducts

Older Dallas homes, especially those built in the 1960s and 70s, have galvanized metal ducts that rust at the seams. Rusted seams leak, and what leaks out gets replaced by attic air pulling in. So all that attic insulation fiber, dust, and whatever else is up there ends up in your air stream. We brush on mastic sealant at every accessible joint, creating an air-tight, durable seal that flexes with the metal through seasonal expansion instead of cracking like older tape jobs.

Flex Duct Repair and Reconnection

Homes built from the 1970s through the 1990s in Dallas often rely on flexible ductwork, and flex duct has a nasty habit of sagging, kinking, or pulling loose at the connection points. A disconnected flex duct in the attic is pouring conditioned air into a space nobody lives in. We reconnect, reseal, and where needed, replace sections of flex duct that have degraded beyond repair.

Trusted Brands We Service in Dallas

We service and seal systems built around equipment from Nikro, Honeywell, and Aprilaire, the same brands that commercial HVAC crews rely on in Dallas and across the metroplex. Because we know these systems well, our Dallas customers get faster turnaround on parts and a crew that doesn’t have to figure out your equipment as it goes. Whether you’ve got an older Honeywell filter cabinet or an Aprilaire whole-home system, the sealing principles stay the same, but the details matter. Our trucks are stocked with sealants and insulation rated to work with these systems, so most jobs in Dallas are completed in one visit.

Common Duct Sealing Problems We See in Dallas Homes

• Rusted galvanized seams in older Dallas neighborhoods. Homes in Lake Highlands and Casa View frequently have original 1960s metal ductwork. Decades of attic heat and humidity have rusted the seams, and those rusted seams are actively pulling attic air and insulation fibers into the living space.
• Crushed or disconnected flex ducts in pier-and-beam homes. Dallas has thousands of homes on pier-and-beam foundations, and the flex ducts running under those houses are vulnerable. Wildlife, moisture, and simple age crush or disconnect them, and the leaks go unnoticed until a sealing job uncovers them.
• Dried-out mastic from attic heat. Dallas summers bake attics, and mastic sealant applied five or ten years ago can dry, crack, and peel away from duct joints. The original seal fails, the leak returns, and the homeowner assumes sealing didn’t work. It did work, but it aged out in the heat.
• Dust and pollen loading from open land around Dallas. Homes on the edges of Dallas, near unpaved roads or open prairie, see fine particulate loading on duct surfaces. That coating makes it harder for sealant to adhere properly unless the ducts are source-removal cleaned first, which is why we always clean before we seal.

Pricing for Duct Sealing in Dallas, TX

We Also Serve Cities Near Dallas

Our crews handle Duct Sealing jobs throughout the metroplex, including Richardson, DeSoto, Garland, and Rowlett. If you’re outside Dallas proper but within a reasonable drive, we’ll come out and do the same written-price, guaranteed work. Duct Sealing in Dallas is our home base, but the service territory covers all of Dallas County and the surrounding suburbs.

FAQs About Duct Sealing in Dallas