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 Garland
Duct sealing in Garland typically runs between $850 and $2,400 depending on how much of your ductwork needs attention, and most jobs finish in a single day. Hollis Air Duct Dallas serves Garland homeowners with written pricing before any work starts, which means the number on your estimate is the number you pay. If you’ve noticed weak airflow from certain rooms, dust building up fast on furniture, or cooling bills that keep climbing, call (361) 309-6223 and we’ll walk you through what’s actually going on in your ducts.
We know Garland’s homes because we work in them every week. The ranches in Camelot, the split-levels off Broadway, the brick one-stories near Duck Creek. That local familiarity matters when diagnosing duct problems, because a 1978 home with clay soil under it fails differently than a 2006 build in Firewheel.
Why Hollis Air Duct Dallas Is Garland’s Preferred Duct Sealing Company
Garland homeowners call us after they’ve tried the rest. They’ve had crews show up late, push a $49 teaser price, then leave them with an invoice four times the quote. So we built our business around what those homeowners actually want: a price in writing before the first tool comes off the truck, techs who arrive in uniform with background checks on file, and a guarantee that actually says something.
Roy Castellanos leads our crew, and he’s set The Garrison Code as our operational standard: arrive inside the quoted window, price it before we touch it, do the work by the book, leave the site clean. Every duct sealing job in Garland carries the 365-Day Done Right Promise. If the seal fails within a year, we come back and make it right at no charge. That includes a free second visit, not a negotiated favor.
Our phones are answered by a live person around the clock. No voicemail loops, no waiting until Monday for a callback. When a Garland homeowner calls at 6 a.m. before work, someone picks up and schedules the job. The office coordinating Garland dispatch is our Dallas-Fort Worth operation, and our crews know the Garland streets well enough to arrive without calling for directions.
Styles & brands we work with
HVAC Duct Sealing in Garland
HVAC Duct Sealing in Garland means closing every gap, crack, and separated joint in the duct runs that carry conditioned air from your furnace or air handler to each room. In Garland, most of that ductwork lives in the attic, where summer heat bakes it and winter cold makes materials contract. A sealed system means the air you paid to cool stays in the duct until it reaches a register, instead of leaking into the attic and making your system work harder.
We use mastic and UL-181 rated tapes, applied by hand at every accessible joint. Not duct tape from the hardware store. The job starts with a visual inspection of the visible runs, often paired with a camera inspection of the sections we can’t reach by eye. When we find a leak, we seal it. When we find a crushed section, that’s a repair, not a sealing job, and we’ll show you the camera footage before quoting that work separately.
Whole-House Sealing
Most Garland homes we see need sealing across the entire attic run, not just one or two joints. Over decades, the original tape dries out and falls off. Connections where flex duct meets the register boot pull loose. The price for a full sealing job on a typical one-story ranch usually lands between $1,200 and $1,800, depending on how many feet of duct are in the attic and how much of it is accessible.
Leak Repair Before a Cleaning
If you’re scheduling a duct cleaning and the tech finds separated connections, get those sealed during the same visit. Cleaning an unsealed system pulls attic air, dust, and insulation fibers into the duct the moment the negative-air machine turns on. We can seal first, then clean, in one trip.
Duct Repair in Garland
Duct Repair in Garland is what happens when sealing isn’t enough because the duct itself has failed. We’re talking about collapsed flex runs, crushed sections under attic decking, separated trunk lines, or boots that have pulled free from the floor plate. Garland’s clay soil shifts, and in slab foundations, that movement can yank duct boots loose from below, opening a channel for dirt and moisture to enter the system.
Repair pricing starts around $350 for a simple boot reconnection or a short section of replacement flex, and runs up to $900 or more for a long crushed run that requires pulling and replacing 10 feet of trunk line. We show you the camera footage before we quote repair work, so you’re not taking our word that the duct is crushed. You’ll see it.
Replacing Collapsed Flex Runs
Garland homes built in the 1960s through the 1980s often still run the original gray flex duct. Inside an attic that hits 140 degrees in August, that material breaks down. The inner liner separates, the coil collapses, and the duct flattens. When we find a section like that, the fix is replacement, then mastic sealing at both connection points. We don’t try to seal crushed duct back to life.
Boot Reconnection and Floor Plate Work
When a register boot pulls away from the slab, the gap lets in soil gases, moisture, and insects. That’s a sealing and repair job in one. We pull the register, inspect the opening, pack the gap, and seal the boot to the duct with mastic. For homes in older Garland neighborhoods like Northlake, this is one of the most common repairs we make after a camera inspection.
Trusted Brands We Service in Garland
Garland homeowners run systems from every major manufacturer, and our techs work on all of them, Trane, Carrier, Lennox, Goodman, Rheem, and the rest. We carry a range of replacement flex duct, mastic, registers, and boots on the truck, so most repairs in Garland get finished same day without waiting on a supply house. When we install filtration upgrades during a sealing job, we stock products from Honeywell, Aprilaire, and Nikro. If your system needs a filter housing or a media cabinet, we explain the options in plain terms and quote them in writing before we install anything.
Common Duct Sealing Problems We See in Garland Homes
- Collapsed attic flex runs. The 1970s gray flex duct in older Garland homes breaks down internally from heat, and the inner coil collapses. The duct looks round from the outside but lets almost no air through. The fix is replacement, then sealing both ends with mastic.
- Clay soil shifting beneath slabs. Garland’s expansive clay soil moves with moisture, and over 40 or 50 years, that movement cracks slabs and pulls duct boots loose. The gap where the boot meets the floor lets dirt and humid air into the system. Every boot that’s separated gets repacked and sealed.
- Insulation pulled into the return plenum. When joints in the return run aren’t sealed, the negative pressure from the air handler pulls blown-in attic insulation through every gap. In Northlake and Camelot homes, we’ve found the return plenum packed with fiberglass. The solution is sealing every return-side joint, then cleaning the plenum and coil.
- Disconnected trunks from attic foot traffic. Garland homeowners use their attics for storage, and that foot traffic knocks round flex and metal trunk sections loose. One disconnected trunk can dump half your conditioned air into the attic. We reconnect, support the section with strapping, and seal it.
See the difference
Before
After
Before
After
Before
AfterPricing for Duct Sealing in Garland, TX
Expect to pay between $850 and $2,400 for duct sealing in Garland, with most single-story ranch homes landing between $1,200 and $1,800 for a full attic run. Smaller jobs, like sealing one disconnected boot or a single joint, start around $200 to $350. Replacement of collapsed flex duct runs adds to the total, typically $350 to $900 per section, depending on length and how hard the run is to reach.
Three things move the price in Garland: how many feet of duct are in the attic, how much of the attic is accessible without removing decking, and whether the job is sealing only or sealing plus repair. The quote we write before work starts is the price you pay. No per-foot add-ons, no materials surcharge after the fact. Call (361) 309-6223 for a free estimate on your Garland home.
We Also Serve Cities Near Garland
Hollis Air Duct Dallas runs crews to Sachse, Rowlett, Richardson, and Dallas as well, so if you’re just outside Garland proper, the same written pricing and 365-Day Done Right Promise apply. Our Duct Sealing work extends to the full northeast corridor, and homeowners in Garland and the surrounding cities call the same number: (361) 309-6223.
Serving Garland, TX - Our Local Coverage Area
We’re based in the Garland 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 Garland
No. If the gray flex duct from 1975 has collapsed internally, sealing the outside joints won’t restore airflow. The crushed section has to be replaced. We run a camera through the run to see whether the duct is crushed or just leaking at the connections. If it’s crushed, we quote the replacement and then seal all the surrounding joints with mastic so the new section operates as part of a sealed system. Call (361) 309-6223 and we’ll inspect yours.
A camera inspection before any cleaning shows you exactly what’s connected and what isn’t. We push a small camera through the main runs and look for separations, crushed sections, and gaps. You see the footage on the spot. If connections are loose, we seal them before cleaning starts, otherwise the negative-air machine pulls attic debris into the open duct. The cleaning estimate includes a camera check of the accessible runs.
We seal from the outside at every accessible joint, using mastic and UL-181 rated tape. Mastic is a paste that hardens into a durable seal, not the cloth tape that dries out and falls off after a few Texas summers. For ducts that are completely inaccessible, interior aerosol sealing exists, but in Garland attics, the standard job is hand-applied mastic at every boot, branch, and trunk connection. We don’t paint mastic over crushed duct, we replace that section first.
It’s both, and in Garland it’s more common than homeowners realize. Unsealed joints in the return run create negative pressure that pulls loose-fill insulation through every gap. That insulation builds up in the return plenum and can coat the air handler coil. The fix is sealing the return-side joints so no more insulation gets pulled in, then cleaning the plenum and inspecting the coil. We’ve seen this exact situation in Camelot, Northlake, and older Garland neighborhoods where the original ductwork is still in place.
Most one-story Garland ranches take four to seven hours for a full attic sealing job. That includes the camera inspection of the main runs, sealing every accessible joint with mastic, and verifying airflow at each register before we pack up. If we find collapsed sections that need replacement, the job may run into a second day, and we’ll tell you that before work starts. Call (361) 309-6223 for a schedule and a written quote.
Call Hollis Air Duct Dallas for Duct Sealing in Garland
If you own an older Garland home and you’ve never had the ducts inspected, the odds are good there’s something in that attic worth seeing. Call (361) 309-6223 and we’ll schedule a camera inspection, give you a written price for any sealing or repair work, and do the job under The Garrison Code. Roy Castellanos and our crew work Garland every week. We know these homes, we know their ductwork, and we stand behind every seal for a full year.
Written by Roy Castellanos, Owner at Hollis Air Duct Dallas, serving Garland and the surrounding cities since 2004.