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

Fast, Reliable Duct Sealing Across Murphy

Duct sealing in Murphy typically runs $850 to $2,400 per system, and most jobs are completed in a single day by a two-person crew. The price is written down before we touch anything, and it doesn’t move at the door. That matters in Murphy, where two-story brick-and-stone homes built in the 2000s and 2010s often have flexible ductwork in unconditioned attics that sags, separates, and quietly leaks conditioned air into the Texas heat. If your upstairs feels five degrees warmer than your downstairs every July, or you can smell dust the moment the AC kicks on, you’re likely losing air before it reaches a single register. Call us at (361) 309-6223 and we’ll walk you through what’s actually happening.

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

Hollis Air Duct Dallas is part of the Garrison Partners family, in business since 2004, and run locally under The Garrison Standard. That standard is simple to say and harder to do: arrive inside the quoted window, put the price in writing before any work starts, do the job by the book, and leave the site cleaner than we found it. Our Duct Sealing crews are background-checked and uniformed. You’ll know who’s walking through your door before the van pulls up.

We work in Murphy regularly, from Maxwell Creek to Rolling Ridge Ranch and the newer subdivisions going in along East Farm-to-Market 544. Homeowners here tend to ask the same set of questions: what’s leaking, how do you know, and what will it cost to fix it right. We answer all three with a camera inspection and a written quote, not a guess and a handshake. Roy Castellanos, who leads our Duct Sealing division, insists on one flat price per system agreed before work starts. No per-vent pricing. No bait-and-switch. If the work fails within a year, the 365-Day Done Right Promise brings us back at no charge, including a free second visit.

Written by Roy Castellanos, Owner at Hollis Air Duct Dallas, serving Murphy, TX.

HVAC Duct Sealing in Murphy

HVAC Duct Sealing in Murphy means closing every gap and seam in your duct system so the air you paid to cool and heat actually reaches the rooms you live in. In a market like Murphy, where many homes run two HVAC systems and ductwork winds through unconditioned attic space, small leaks add up fast. We inspect with a camera, map the runs, and seal joints with mastic and fiberglass mesh. That’s the trade-standard approach, and it outlasts foil tape by years. A typical single-system home in Murphy runs $850 to $1,600 for sealing; a two-system home with a slab return chase can run $1,800 to $2,400 depending on access.

Sealing Attic Flex Ducts

Flexible ducts in Murphy attics take a beating. The heat dries out the outer jacket, the runs sag between strapping points, and the inner liner pulls away at the joints. We remove failed connections, reconnect the inner liner with a proper mechanical fastener, and seal the outer jacket with mastic. The result is less attic air pulled into your system and less conditioned air dumped into a 140-degree attic.

Sealing Slab Return Chases

Many Murphy homes, especially east of Murphy Road, have return-air ducts in the concrete slab or in wall chases. These pulls collect fine gray silt over time, and they frequently leak at the transitions where the slab chase meets the vertical duct. Sealing these requires access panels, patience, and a good light. We’ve done enough of them in Murphy to know exactly where the leak points tend to be.

Duct Repair in Murphy

Duct Repair in Murphy usually means fixing what’s already failed rather than sealing what’s merely seeping. Sagging flex ducts that have pulled apart at the collar are the most common repair we make in Murphy attics. The second most common: crushed or kinked runs where a technician or a cable installer stepped on the duct. Repair costs in Murphy typically run $350 to $900 per repair point depending on access and whether the damaged section needs full replacement. A common single-visit repair including two or three fixes and resealing runs $1,200 to $2,000.

Replacing Damaged Flex Runs

When a flex run has collapsed or been punctured, sealing won’t save it. We replace the section with new R-6 or R-8 flex, proper metal collars, and mastic-sealed connections at both ends. In Murphy’s attic heat, anything less than a proper mechanical connection will pull apart within a season.

Repairing Return-Air Chases

Slab return chases in older sections of Murphy sometimes develop gaps where the sheet-metal transition has pulled away from the chase. We repair those with custom-fabricated metal transitions and seal them with mastic and mesh. This directly addresses the dusty-smell problem many Maxwell Creek and Creek Hollow homeowners report on the ground floor.

Trusted Brands We Service in Murphy

We work on duct systems from every major residential HVAC line, and we keep sealing materials and common replacement parts on the truck so Murphy jobs don’t stall waiting on a supply house run. We stock mastic and mesh rated for high-humidity attics, R-6 and R-8 flex duct, and filter housings from Honeywell and Aprilaire. For homes switching to high-MERV filtration to handle Murphy’s cottonwood and construction dust, we often recommend pairing the sealing work with a proper filter cabinet so the new, denser filter doesn’t spike static pressure and undo the sealing effort. We also service negative-air cleaning equipment from Nikro and Abatement Technologies, which matters when a sealing job follows a post-construction cleanup.

Common Duct Sealing Problems We See in Murphy Homes

• Sagging flex ducts in unconditioned attics. The 100-plus-degree attic heat in July and August softens the outer jacket on flex runs, especially where strapping is too far apart. Once a run sags, the inner liner stretches and separates at the collar, and the system starts pulling in hot attic air.
• Gray silt buildup in slab return chases. Homes east of Murphy Road sit on what was once Blackland Prairie and cotton fields. The fine gray silt from that soil works into slab return chases and packs into corners, restricting airflow and making the first-floor return pull harder than it should.
• High-MERV filters clogging fast. Murphy’s spring is a wall of cottonwood pollen and wind-blown clay dust. Homeowners who switch to MERV 11 or MERV 13 filters often see them load up in four to six weeks, which spikes static pressure and pops poorly sealed seams open again.
• Two-system homes with uneven pressures. Many Murphy homes run separate upstairs and downstairs systems. When one system’s ducts are leaky and the other’s are tight, the pressure imbalance pulls dust through the leakier side and makes one floor noticeably stuffier. We seal both systems so they balance.

Pricing for Duct Sealing in Murphy, TX

We Also Serve Cities Near Murphy

Our crews cover Murphy and the surrounding Collin County communities, including Duct Sealing in Murphy and nearby Dallas, Garland, Richardson, and Rowlett. If you’re in one of those cities and dealing with the same attic-heat and cottonwood-dust problems, the process, the written pricing, and the 365-Day Done Right Promise are exactly the same.

FAQs About Duct Sealing in Murphy