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 Rockwall
Duct sealing in Rockwall typically costs $450 – $1,200 for a whole-home seal, depending on whether we’re patching accessible joints or replacing crushed flex runs in the attic. Most Rockwall jobs take a half day, and we price them in writing before we touch anything.
We’ve worked the length of Ridge Road to the Lake Ray Hubbard shore, through the subdivisions off Highway 66, and up into the newer builds near the John King Boulevard corridor. Rockwall’s mix of 1980s brick ranches and recent construction on former ranch land means no two attics look the same, and the duct problems we find are rarely what the homeowner expected. Our dispatch runs from the Dallas-Fort Worth office, but crews are in Rockwall regularly. Call (361) 326-5060 and we’ll get you a written estimate.
Why Hollis Air Duct Cleaning Is Rockwall’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Duct Sealing team has handled the specific failures that Rockwall’s climate and housing stock produce. The 365-Day Done Right Promise covers every seal we make: if it fails within a year, we come back and make it right at no charge, including a free second visit. That’s written on every job, not implied.
Our technicians are background-checked and uniformed, and they arrive inside the quoted window. The price is written down before any work starts, and it does not move at the door. In Rockwall, where lakefront humidity and decades of pollen accumulation punish attic ductwork, that discipline matters. We’ve reattached crushed flex runs in original 1980s ranches and sealed rigid metal joints in new builds where construction dust masked the real problem. Both get the same standard: show up, price it, do it by the book, leave it clean.
Duct Repair in Rockwall
Duct Repair in Rockwall often starts with a complaint that won’t go away: one room stays hot, the utility bill climbs, or the house smells like attic every time the system cycles. In our experience, the cause is usually physical damage to the duct runs, not a dirty system that needs cleaning.
In Rockwall’s 1980s – 1990s brick ranches near Lake Ray Hubbard, we regularly find flexible attic ductwork that has collapsed under its own weight, been chewed by rodents, or pulled loose at the collar where it connects to the plenum. Newer inland subdivisions have different problems: rigid metal ducts with separated seams, or joints that were never properly sealed during construction on former ranch land. We inspect with a camera first, then quote the repair in writing.
Collapsed or Disconnected Runs
A crushed flex duct dumps conditioned air into the attic and pulls unconditioned air back into the system. We remove the damaged section, replace it with properly sized flex or rigid duct, and seal all connections with mastic. The homeowner feels the difference immediately.
Leak Testing and Targeted Patching
Not every leak needs a full replacement. Where the duct is sound but the joints have failed, we pressurize the system, locate the loss with a smoke pencil or thermal camera, and seal only what needs sealing. This saves Rockwall homeowners money and fixes the problem for good.
Air Duct Sealing in Rockwall
Air Duct Sealing in Rockwall is the step that comes after cleaning, or instead of it, when the real problem is air loss rather than contamination. Sealing means closing the gaps where conditioned air escapes and unconditioned air enters: plenum connections, register boots, joints between duct sections, and the access panel on the air handler.
We use mastic compound and fiberglass mesh for permanent seals, not duct tape, which dries and fails within a few years. For Rockwall’s original 1980s – 1990s flexible ductwork, we often combine sealing with strategic replacement: seal what we can, replace what’s too far gone. The goal is a system that moves all its air through the rooms it’s supposed to serve.
Mastic Sealing vs. Aeroseal
Mastic is the standard we apply by hand to every accessible joint. It’s permanent, inspectable, and costs less than pressurized sealant systems. For some Rockwall homes with extensive leakage in inaccessible wall cavities, we may discuss pressurized sealing, but we always explain why and what it costs before proceeding.
Post-Seal Verification
After sealing, we test again. The homeowner sees the before-and-after leakage numbers. In Rockwall, where high summer cooling loads make every lost CFM expensive, that verification matters. A properly sealed duct system can drop utility bills 15 – 30% in homes with significant leakage.
Trusted Brands We Service in Rockwall
We stock parts and filtration products from Honeywell, Aprilaire, and Abatement Technologies, the same brands commercial crews specify. For Rockwall homeowners, that means fast turnaround on repairs and replacements without waiting on Dallas warehouse shipping. Our equipment roster also includes Nikro negative-air machines and Rotobrush rotary systems for the cleaning work that often precedes sealing. When we find a failed component during a Rockwall job, we replace it with the right part, not a universal fit that will fail again.
Common Duct Sealing Problems We See in Rockwall Homes
- Original flex duct torn at lakefront ranches. The 1980s – 1990s flexible ductwork in Rockwall’s brick ranches near Ridge Road and the Lake Ray Hubbard shore has aged past its design life. Heat, attic dust, and decades of expansion and contraction crack the inner liner and pull the insulation away from the core.
- Disconnected collars dumping air into attics. We find supply and return collars separated from the main trunk line, sometimes by several inches. The system runs constantly trying to reach setpoint, and the homeowner pays to cool a 140-degree attic.
- Moisture and mold in unsealed returns. Rockwall’s humid subtropical climate and lake proximity mean high moisture content in attic air. When return ducts pull that air through gaps, condensation forms on the cool metal, feeding mold that survives cleaning and re-contaminates the system.
- Construction debris in newer rigid ducts. Homes built on former ranch land in the 2000s and 2010s often have rigid metal ductwork clogged with drywall dust, wood chips, and agricultural residue. The debris masks leaky joints and restricts airflow, so we clean first, then seal.
Pricing for Duct Sealing in Rockwall, TX
A typical duct sealing job in Rockwall runs $450 – $1,200 for a whole-home seal on accessible ductwork. Partial sealing of specific problem areas starts around $280. If we need to replace crushed or disconnected flex runs, add $180 – $340 per run depending on length and attic access difficulty.
What moves the price: the amount of ductwork, whether it’s accessible from the attic or buried in walls, the condition of the existing material, and whether we find damage that requires repair before sealing makes sense. We do not quote per-vent pricing. One flat price per system, agreed in writing before we start. Estimates are free. Call (361) 326-5060.
We Also Serve Cities Near Rockwall
Our crews work Rockwall regularly and also handle duct sealing in Fate, Royse City, Lavon, and Rowlett. The same written pricing, same 365-Day Done Right Promise, same background-checked technicians at every stop.
Serving Rockwall, TX - Our Local Coverage Area
We’re based in the Rockwall 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 Rockwall
Homes near Lake Ray Hubbard face heavier pollen loads and higher humidity that accelerate duct deterioration. Open windows during spring let juniper, oak, and ragweed spores infiltrate leaky original flex duct, and lake moisture condenses in unsealed returns, promoting mold. We camera-inspect first and seal only the runs our inspection proves are losing air. Call (361) 326-5060 for a free estimate.
We can seal sound flex duct at the collars and joints with mastic, but we replace duct that is torn, collapsed, or delaminated. In a 1980s brick ranch off Ridge Road near the Lake Ray Hubbard shore, our tech found a crushed flexible supply run to the back bedroom disconnected at the collar, dumping conditioned air into the attic, plus decade-old pollen and construction dust caked in the return. We pulled the run under negative pressure with HEPA filtration, reattached and sealed the collar with mastic, then sealed the remaining supply and return ducts and cleaned the air handler blower motor. The homeowner immediately noticed better airflow and less pollen odor. Call (361) 326-5060 to schedule an inspection.
Yes, by stopping the moisture intrusion that feeds mold. Unsealed return ducts pull humid attic air into the system; that moisture condenses on cool surfaces and creates conditions for mold growth. Sealing the duct envelope breaks that cycle. If mold is already present, we clean first, then seal to prevent recurrence. Call (361) 326-5060 to discuss your situation.
Cleaning removes dust, pollen, and debris from inside the ducts. Sealing closes the gaps where air escapes and contaminants enter. A dirty system with major leaks will re-contaminate quickly; a sealed system with no cleaning may still circulate debris. We assess which your Rockwall home needs, or whether both make sense. Call (361) 326-5060 for an honest evaluation.
We pressurize the system and use a smoke pencil or thermal camera to visualize air loss. In Rockwall’s older homes, we also run a camera through the ductwork to find crushed runs and disconnected collars that pressure tests alone might miss. You see the footage and the leakage numbers before we quote any work. Call (361) 326-5060 to schedule.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Rockwall since 2004.