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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Before
AfterFast, Reliable Duct Sealing Across Garland
Duct sealing in Garland typically runs $450 – $1,200 for a whole-home system, with most single-family jobs falling between $650 – $900 depending on attic access and how much of the ductwork needs mastic and mesh reinforcement. Our crews are dispatched from the Dallas-Fort Worth office and carry the tools to seal galvanized hard pipe, flex duct, and plenum joints on the same visit. If you’re in Firewheel, Club Hill, or the older ranch neighborhoods near downtown Garland, we’ve likely already worked on a home with your exact duct configuration. Call (361) 326-5060 and we’ll give you a written price before any work starts.
Why Hollis Air Duct Cleaning Is Garland’s Preferred Duct Sealing Company
We’ve been sealing ducts in Garland since long before most of the current competitors opened shop. Our Duct Sealing in Garland crews know the difference between a 1962 slab ranch off Jupiter Road with original galvanized returns and a 1994 two-story in the northern subdivisions with flex duct that failed after the last hail storm.
Our technicians are background-checked, uniformed, and expected to operate under The Garrison Code: arrive inside the quoted window, price in writing before touching anything, complete the job by the book, and leave the site clean. Every seal job carries our 365-Day Done Right Promise in writing. If the mastic cracks, a joint opens, or airflow drops because of our work, we come back and make it right at no charge, including a free second visit.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
Duct Insulation in Garland
Duct Insulation in Garland is often the missing half of a sealing job, especially in the 1950s-’70s slab ranches near downtown where return ducts run through 140-degree attics. Sealing the joints without insulating the chase just sets you up for the same leaks next summer, when the mastic and tape dry out again from constant heat exposure.
We insulate with foil-faced fiberglass wrap and closed-cell foam where appropriate, using the same professional-grade materials commercial crews rely on. A typical duct insulation job in Garland runs $300 – $800 depending on linear feet and whether we’re working in a tight attic or a more accessible crawl.
Attic-Routed Returns in Older Ranches
Garland’s original slab neighborhoods frequently have return air chases pulling through the attic instead of through conditioned space. That design pulls in attic dust, insulation fibers, and whatever debris the roofers dropped during the last hail repair. We seal the chase at the plenum and boots, then insulate the exterior so the return air stays clean and cool.
Post-Storm Recovery Insulation
After a major hail event, we often find insulation wrap torn or water-stained from roof leaks that preceded the replacement. We remove damaged wrap, seal any new gaps the storm opened, and re-insulate with fresh foil-faced material rated for North Texas attic temperatures.
HVAC Duct Sealing in Garland
HVAC Duct Sealing in Garland addresses the leaks and disconnected runs that waste cooled air into your attic, crawl, or wall cavities. In a climate where your AC runs hard from May through October, even a 15% duct leakage rate can add hundreds to your annual electric bill and let humid outside air get pulled into the system.
We seal with water-based duct mastic reinforced with fiberglass mesh, the standard that outlasts foil tape in Garland’s heat. For flex duct, we reconnect separated sections with proper collars and seal the joints. Most residential HVAC duct sealing in Garland falls between $450 – $1,200, with simpler single-zone systems at the lower end and multi-zone homes with attic air handlers toward the higher end.
Static Pressure Testing Before and After
We measure static pressure at the air handler before we start and after we finish. You’ll see the number drop if the sealing worked. In one Club Hill home after a spring hail event, static pressure fell from 0.9 to 0.55 inches of water column after we reconnected a crushed flex run and sealed the plenum.
Shared Systems in Multifamily Buildings
Garland apartments and condos with shared duct chases or rooftop units need coordination with building management, but the sealing principles are the same. We work with your HOA or property manager to schedule access, contain our work to your unit or the common chase as needed, and document what we sealed for your records.
Trusted Brands We Service in Garland
Our vans carry sealing and testing equipment from Nikro and Abatement Technologies, plus filtration products from Honeywell and Aprilaire. We don’t run to the supply house mid-job. For Garland homeowners, that means we can test static pressure, seal with mastic and mesh, and verify airflow restoration in a single visit. If your system needs a filtration upgrade after sealing, we stock Honeywell and Aprilaire media cabinets and can quote that in writing alongside the seal work.
Common Duct Sealing Problems We See in Garland Homes
- Hail-season debris in flex duct. Garland sits in Hail Alley, and roof replacements after spring storms dump shingle granules into attics. Those granules get sucked into flex runs through gaps at the plenum and boots, accelerating wear and restricting airflow. Sealing the gaps stops the ingestion.
- Dried mastic on galvanized attic ducts. Original galvanized systems in downtown-area ranches run through 140-degree attics for decades. The mastic and tape dry out, crack, and open. We scrape and reseal with fresh mastic and mesh, then insulate to slow the next cycle.
- Disconnected flex runs after roof work. After a big hail or wind event, we regularly find crushed or disconnected flex duct in Garland attics from debris impact. The repair pattern follows storm seasons, not house age.
- Shared dryer vent stacks in apartments. Garland multifamily buildings with shared stacks often have lint accumulation past the trap. If one unit’s connection is sealed but the rest of the stack stays open, airflow stays restricted and fire risk persists. We seal the full pathway or coordinate with building management on stack replacement.
Pricing for Duct Sealing in Garland, TX
A typical whole-home duct sealing in Garland runs $450 – $1,200. Single-zone homes with accessible attics usually land at $650 – $900. Two-story homes with attic air handlers, multiple plenums, or significant flex duct replacement after storm damage can reach the upper end. Duct insulation alone is typically $300 – $800.
What moves the price: how many linear feet need sealing, whether we’re working in a 140-degree attic or a accessible crawl, if flex duct needs replacement rather than just reconnection, and whether we need to coordinate access with an HOA or property manager. We give you one flat price per system, agreed in writing before any work starts. No per-vent pricing. No invoice that balloons once the van is in your driveway. Estimates are free. Call (361) 326-5060.
We Also Serve Cities Near Garland
Our crews regularly seal ducts in Garland and the surrounding communities of Sachse, Rowlett, Wylie, and Richardson. Same written pricing, same 365-Day Done Right Promise, same live-answer scheduling.
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
Yes, with written approval from your property manager or HOA. We coordinate access to shared chases and rooftop units, document our work for building records, and seal only the portions we’re authorized to touch. Call (361) 326-5060 and we’ll walk you through the approval process.
Yes, especially if you’re pulling 140-degree attic air and insulation fibers into your system. Sealing the chase at the plenum and boots, then insulating the exterior, typically improves airflow and reduces the dust load your filter has to handle. Most downtown-area ranch jobs run $650 – $900 for sealing plus $300 – $600 for insulation.
Sealing usually helps, and full replacement is only needed if the flex duct is crushed beyond repair or the galvanized is rusted through. After a spring hail event in the Club Hill area, a homeowner replacing their roof called us because one bedroom never cooled. Our tech ran a camera inspection and found a disconnected flex run in the attic, shingle granules and roof debris pulled into the supply and return ducts, and a crushed section behind the air handler. We reconnected and sealed the run with mastic and mesh, sealed plenum joints, and then scheduled duct cleaning with negative pressure and HEPA filtration to remove the storm grit – static pressure dropped and the bedroom airflow came back.
We schedule through your property manager, park in designated service areas, and carry portable Nikro negative-air machines and sealing kits that fit through standard doorways. No rooftop crane needed for most jobs. We contain our work area and leave common spaces clean.
Sealing reduces mold risk by stopping humid attic air from getting pulled into the system through leaks. Garland’s humid subtropical climate pushes moisture-laden air through any gap from May through October. Sealed ducts keep the cool, conditioned air inside the lines and the humid outside air outside. For existing mold, we can inspect with a camera and quote remediation separately. Call (361) 326-5060 for an exact assessment.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Garland since 2004 as part of the Garrison Partners family.