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 Richardson
We dispatch our Duct Sealing crews to Richardson from our Dallas-Fort Worth office, and most appointments book within a few business days. If you live in a 1960s or 1970s ranch near Campbell Road or along Coit Road, there’s a fair chance your ductwork has gaps you can’t see. We answer the phone live, 24 hours a day, at (361) 326-5060.
Richardson’s housing stock tells a specific story. Decades of hot summers, clay soil movement, and original galvanized or early flexible ductwork mean many homes need sealing more than they need another surface cleaning. We price every job in writing before we touch anything, and every repair carries our 365-Day Done Right Promise.
Why Hollis Air Duct Cleaning Is Richardson’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Richardson customers come back because we show up inside the quoted window, explain what we found, and leave the site clean. Our technicians are background-checked and uniformed, and we use the same professional-grade equipment on residential jobs that commercial crews demand: Rotobrush rotary brush systems, Nikro negative-air machines, and filtration products from Honeywell and Aprilaire.
Our 365-Day Done Right Promise means if the work fails within a year, we return and make it right at no charge, including a free second visit. That guarantee is backed in writing on every job, not offered verbally and forgotten. We don’t compete on teaser prices that jump once the van is in your driveway. We compete on discipline: written price, written guarantee, work done by the book.
Calls are answered by a live person, 24/7. No voicemail loops, no callback queues, no waiting until Monday morning to schedule.
Air Duct Sealing in Richardson
Air Duct Sealing in Richardson is often the real fix for homeowners who’ve already had their ducts cleaned but still smell musty air, see high utility bills, or feel uneven temperatures from room to room. The job involves finding gaps, separations, and crushed runs in your duct system, then sealing them with mastic and mesh or reconnecting flexible ductwork so your conditioned air actually reaches the rooms it’s supposed to serve.
A typical duct sealing job in Richardson runs $450 – $1,200 depending on how many leaks we find, whether we need to access the attic or crawl space, and whether the ductwork requires cleaning before sealing. We always inspect first and give you a written price before any work starts.
Slab Movement and Separated Returns
Richardson sits on the Gulf Coastal Plain where expansive black clay soils cause slab and foundation movement. That movement cracks and separates HVAC return ducts in older 1960s-70s ranch homes. We see this in neighborhoods like Canyon Creek and Prairie Creek, where the main return trunk shears at slab penetrations and pulls unconditioned attic air into the system. Sealing these gaps restores proper airflow and stops the system from working overtime.
Attic Heat and Duct Degradation
In Richardson’s unconditioned attics, summer temperatures exceed 140°F. That heat bakes dust onto duct walls and degrades the adhesive on older tape and mastic. We clean before we seal, then apply fresh mastic rated for high-temperature environments so the repair lasts.
Duct Sealing Services in Richardson
Duct Sealing Services in Richardson from Hollis address the specific failure modes this city’s climate and soil create. We don’t just tape over gaps. We inspect with cameras, measure static pressure before and after, and verify that sealed joints hold under operating conditions. The work typically takes 3 – 6 hours for a single-story home and can often be completed in one visit.
Most Richardson homeowners call us for duct sealing after noticing musty odors, rooms that won’t cool evenly, or utility bills that climbed despite no change in thermostat settings. These symptoms point to return leaks pulling attic air, or supply leaks dumping conditioned air into the attic before it reaches your living space.
Source Removal Before Sealing
Sealing over dirty ductwork traps contaminants and prevents mastic from bonding properly. Our process includes HEPA-filtered source removal using Nikro negative-air equipment, then sealing only after the surface is clean. This is especially important in Richardson’s older homes where decades of accumulation line the original ductwork.
Pressure Testing and Verification
We measure static pressure before we start and after we finish. The numbers don’t lie. A properly sealed system shows lower static pressure at the air handler, which means your blower motor isn’t straining, your airflow improves, and your energy bills reflect the difference.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Richardson
We carry professional-grade equipment and materials from Nikro, Honeywell, and Aprilaire, the same brands commercial HVAC crews specify. For Richardson homeowners, this means we don’t order parts from a warehouse three states away and make you wait. We stock mastic, mesh reinforcement, and flexible duct connectors suited to the high-heat attic environments common in Canyon Creek, Prairie Creek, and the older ranch neighborhoods along Plano Road. Fast turnaround matters when your system is pulling 140°F attic air through a separated return.
Common Duct Sealing Problems We See in Richardson Homes
- Clay-soil movement shears duct connections at slab penetrations. Richardson’s expansive black clay shifts with moisture changes, separating the main return trunk from the air handler in 1960s-70s ranch homes. We find gaps from hairline cracks to full separations pulling unfiltered attic air.
- Original galvanized ducts in unconditioned attics bake dust onto walls at 140°F+. The hard-baked layer prevents new mastic from bonding. We remove the contamination first, then seal. Skipping this step is why DIY patches fail within a season.
- DIY foil-tape patches on flexible ductwork sag and peel in humid summers. Richardson’s humidity softens adhesive and gravity does the rest. Disconnected flex runs strain the blower motor and starve distant rooms of airflow. We reconnect with proper supports and seal with mastic rated for this climate.
- Crushed flex runs in tight attic spaces restrict airflow. In two-story homes from the 1980s-2000s, duct routing through trusses leaves flex duct pinched or kinked. We reroute or replace these sections and seal the connections so air flows freely to second-floor rooms.
Pricing for Duct Sealing in Richardson, TX
A typical duct sealing job in Richardson runs $450 – $1,200 for a residential system. Small single-story ranches with accessible attics and one or two leaks fall at the lower end. Homes requiring extensive sealing of original galvanized ductwork, multiple crushed flex runs, or cleaning before sealing fall toward the higher end. Two-story homes with complex duct systems may exceed this range; we price those after inspection.
What affects your specific cost: the number of leaks found, whether duct cleaning is required before sealing, attic accessibility, and whether we need to replace sections of flex duct or damaged fittings. We do not charge per vent or per linear foot. We quote one flat price per system, agreed in writing before work starts. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Richardson
Our crews work throughout the northern Dallas suburbs. We regularly schedule Duct Sealing in Richardson alongside appointments in Addison, Plano, Garland, and Carrollton. Same standards, same written pricing, same 365-Day Done Right Promise at every stop.
Serving Richardson, TX - Our Local Coverage Area
We’re based in the Richardson 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 Richardson
Richardson’s expansive clay soils cause slab movement that separates return ducts in 1960s-70s ranch homes, creating gaps no amount of cleaning will fix. We inspect with cameras to determine whether your problem is contamination, leakage, or both, then recommend the right work. Call (361) 326-5060 for a free inspection.
We use camera inspection and static pressure testing to locate separations, especially at slab penetrations and attic transitions common in Richardson’s older housing stock. The camera shows gaps we can’t reach with a flashlight; pressure testing confirms how much air you’re losing. Call (361) 326-5060 to schedule testing.
Yes, if the odor comes from your system pulling humid, unconditioned attic air through separated returns. Sealing those gaps stops the infiltration. In one Canyon Creek home, we sealed a 3/4-inch separation at a slab penetration and the musty odor disappeared within 48 hours. Call (361) 326-5060 if you’re dealing with persistent mustiness.
Yes, provided the metal is structurally sound. We clean the interior surface with HEPA-filtered equipment, then apply mastic and mesh to seal joints and small cracks. If sections are corroded through, we replace those portions and seal the connections. We inspect first and give you a written price before any work starts. Call (361) 326-5060.
Attic temperatures above 140°F bake old mastic and tape until they crack, and can degrade new materials if applied incorrectly. We use high-temperature-rated mastic and schedule attic work during cooler morning hours when possible. We also verify that sealed joints hold under full operating temperature. Call (361) 326-5060 to book.
In Canyon Creek, we ran a camera inspection on a 1972 single-story ranch and found the main return trunk separated at a slab penetration, pulling attic air through a 3/4-inch gap. After source removal and HEPA filtration, we sealed the joint with mastic and mesh, then reconnected a crushed flex run to the air handler. The homeowner’s static pressure dropped and the musty odor disappeared.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Richardson and the Dallas-Fort Worth area since 2004.