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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After
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Before
AfterFast, Reliable Duct Sealing Across Grapevine
Duct sealing in Grapevine typically runs $400 – $1,200 for a whole-home system, and most jobs are completed in a single visit. If your upstairs rooms never cool evenly or your energy bills spike every July, separated duct joints in your attic or crawlspace are likely the culprit.
We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and our crews work Grapevine regularly from our Dallas-Fort Worth office. We know the difference between a 1920s pier-and-beam bungalow in Historic Downtown with original galvanized steel ducts and a 1990s tract home in Silver Lake with flex duct sweating in a hot attic. That local knowledge matters because the sealing method, the access path, and the final price all change based on what kind of house we’re walking into. Call us at (361) 326-5060 for a free written estimate before any work starts.
Why Hollis Air Duct Cleaning Is Grapevine’s Preferred Duct Sealing Company
We’ve been in business since 2004, and our Duct Sealing team has worked enough Grapevine homes to know the local failure patterns by heart. Homeowners here don’t need a lecture on air quality; they need a crew that shows up in the window, names a price in writing, and seals the joints so they stay sealed.
Our technicians are background-checked and uniformed, and they work under The Garrison Standard: arrive inside the quoted window, price in writing before touching anything, complete the job by the book, and leave the site clean. Every duct sealing job in Grapevine carries our 365-Day Done Right Promise – if the work fails within a year, 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, no waiting until Monday to schedule.
Duct Sealing Services in Grapevine
Duct Sealing Services in Grapevine address the leaks, gaps, and separated joints that waste conditioned air and force your HVAC system to run longer than necessary. In a climate where 100°F days are routine and systems run almost year-round, even a 15% duct leakage rate can add hundreds of dollars to your annual cooling costs. We use professional-grade mastic compounds and metal-backed tape – not the hardware-store foil tape that peels off in a hot Grapevine attic – to seal supply and return ductwork at every accessible joint, connection, and penetration.
A typical whole-home duct sealing job in Grapevine runs $400 – $1,200 depending on system size, duct material, and access difficulty. Historic Downtown homes with pier-and-beam crawlspaces usually fall at the higher end because our technicians must hand-brush mastic into joints they can barely reach. Silver Lake and Glade Crossing homes with attic flex duct tend toward the middle of the range, provided the duct isn’t already crushed or deteriorated.
Supply Duct Sealing
Supply ducts carry cooled air from your air handler to each room. When joints separate in a hot Grapevine attic, that cooled air escapes before it reaches your registers. We pressure-test the system, locate leaks with a smoke pencil or theatrical fog, then seal each joint with mastic rated for the temperature swings your attic sees from May through September.
Return Duct Sealing
Return ducts pull warm air back to the air handler to be cooled again. A leaky return in a crawlspace or attic sucks in unconditioned air, humidity, and whatever else is in that space – dust, insulation particles, or in older Grapevine homes near DFW Airport, that black sooty film from jet exhaust. Sealing returns is just as critical as sealing supplies, and we treat both sides of the system on every job.
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.
Duct Insulation in Grapevine
Duct Insulation in Grapevine prevents the temperature loss and condensation problems that plague uninsulated or poorly insulated ductwork in our humid subtropical climate. When 55°F cooled air passes through a 130°F attic, the metal or flex duct sweats. That moisture drips onto ceiling drywall, breeds mold in insulation, and reduces the effective cooling capacity reaching your rooms. We install R-6 or R-8 fiberglass duct wrap with a vapor barrier, or replace deteriorated flex duct with insulated flex, depending on what your system needs and what we can access.
Typical duct insulation work in Grapevine runs $300 – $900 for partial-system wrapping and $800 – $2,000 for full replacement of deteriorated flex duct in an attic. Homes in Silver Lake and Glade Crossing with 1980s – 2000s flex duct often need full replacement rather than wrapping because the original insulation has compressed or the outer jacket has torn from years of attic heat. Historic Downtown homes with galvanized steel ducts may need insulation added where none existed originally.
Attic Duct Insulation
Grapevine attics routinely hit 130 – 150°F in July. Without proper insulation, your cooled air warms up before it reaches the bedroom. We wrap accessible metal duct with faced fiberglass insulation and seal every seam with matching tape, or replace crushed flex duct with new insulated flex sized correctly for your system’s airflow.
Crawlspace Duct Insulation
Pier-and-beam homes in Historic Downtown Grapevine have ducts in humid, vented crawlspaces where condensation is a constant threat. We insulate the accessible runs and seal the vapor barrier seams to keep ground moisture from attacking the duct exterior. In some cases we recommend closing crawlspace vents and adding a dehumidifier to protect the work long-term.
Trusted Brands We Service in Grapevine
We carry professional-grade equipment and materials from Nikro, Honeywell, Aprilaire, and Abatement Technologies – the same tools and filtration products commercial crews use, not hardware-store substitutes. For Grapevine homeowners, that means we stock the right mastic compounds, metal-backed tapes, and insulated flex duct sizes to complete most jobs without a parts run. Our technicians arrive with Nikro negative-air machines and Rotobrush rotary systems when duct cleaning precedes sealing, and we source Honeywell and Aprilaire filtration upgrades for homeowners who want cleaner air moving through their newly sealed system. Fast turnaround matters in July when your system is already working overtime.
Common Duct Sealing Problems We See in Grapevine Homes
- Crushed flex duct in Silver Lake and Glade Crossing attics. Homeowners call us for “poor airflow,” and we find flex duct flattened by storage boxes, work boots, or years of compression. Sealing a collapsed run without first restoring its shape just traps the restriction. We always verify duct integrity before sealing.
- Original galvanized steel with separated joints in Historic Downtown. Those 1920s – 1950s pier-and-beam homes have ducts that have shifted with the foundation, opening gaps at every joint. Hand-sealing with mastic in a 24-inch crawlspace is slow, precise work, but it’s the only way to stop conditioned air from pouring into the dirt below.
- The black sooty film mistaken for mold near DFW flight paths. Homes in Glade Crossing and Silver Lake downwind of airport traffic accumulate a distinctive black, oily dust from jet exhaust and diesel particulates. Homeowners panic, but it’s not mold – it’s combustion residue. Sealing over contaminated duct interiors without source removal traps the problem. We clean first, then seal.
- Shared dryer vent stacks in Grapevine condos and apartments. Dense developments near Grapevine Mills or along Highway 121 often route multiple units through a single vertical stack. One disconnected or leaky duct connection lets lint accumulate behind the wall, creating a fire risk for every unit above and below. We inspect the full stack before sealing any individual connection.
Pricing for Duct Sealing in Grapevine, TX
Whole-home duct sealing in Grapevine typically costs $400 – $1,200. Duct insulation runs $300 – $900 for partial wrapping and $800 – $2,000 for full flex duct replacement. What moves you within those ranges:
- System size and number of zones: A 1,200-square-foot ranch in Silver Lake with a single air handler costs less than a 3,500-square-foot two-story in Lakeside with zoned systems.
- Duct material and access: Original galvanized steel in a tight Historic Downtown crawlspace takes longer than accessible attic flex in Glade Crossing.
- Pre-existing damage: Crushed, torn, or asbestos-wrapped duct must be addressed before sealing can begin.
- Combination work: Many Grapevine homeowners bundle duct sealing with air duct cleaning or dryer vent cleaning for a single trip charge.
We give you one flat price per system, agreed in writing, before any work starts. No per-vent pricing. No add-ons at the door. The price on the paper is the price you pay. Call (361) 326-5060 for a free estimate – we’ll inspect your ductwork, explain what we found, and leave you with a written quote you can compare.
We Also Serve Cities Near Grapevine
Our crews work throughout the northeast Tarrant and southeast Denton county area, including Grapevine, Southlake, Colleyville, Euless, and Coppell. Scheduling and dispatch are coordinated from our Dallas-Fort Worth office, with local technicians serving each community. The same written pricing, background-checked crews, and 365-Day Done Right Promise apply in every city we cover.
Serving Grapevine, TX - Our Local Coverage Area
We’re based in the Grapevine 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 Grapevine
Apartment and condo buildings in Grapevine often use shared duct chases or dryer vent stacks that serve multiple units, so we must coordinate access with neighbors and inspect the full shared system before sealing your connection. A single-family home in Colleyville or Southlake has independent ductwork with no shared liability. The extra time protects you and the units above and below. Call (361) 326-5060 to discuss your building’s layout and get a time estimate.
It’s almost certainly not mold. The combination of DFW Airport proximity and prevailing winds deposits a black, sooty film from jet exhaust and diesel particulates on surfaces throughout Glade Crossing and Silver Lake. We’ve shown hundreds of Grapevine homeowners the difference under a flashlight. The correct approach is source removal through professional duct cleaning, then sealing the joints so the particulate doesn’t re-enter. Sealing over contaminated duct interiors without cleaning first just traps the residue. Call (361) 326-5060 and we’ll inspect it at no charge.
Yes, and we do it regularly. The original galvanized steel ducts in Historic Downtown Grapevine’s pier-and-beam homes are often more durable than modern flex duct, but the joints have separated from decades of foundation movement. We hand-brush mastic into each joint, wrap accessible runs with insulation, and verify airflow at every register before we leave. The work takes longer than attic flex duct sealing, but the results last. We were called to a 1920s bungalow off Main Street where separated joints under the pier-and-beam foundation were leaking conditioned air straight into the crawlspace. After sealing with mastic and wrapping the accessible runs, the homeowner immediately noticed stronger airflow and lower humidity.
Duct sealing addresses the connection between your unit and the shared stack, but the stack itself requires a separate inspection and cleaning. A leaky connection lets lint accumulate behind your wall, which becomes a fire risk for every unit in the stack. We inspect the full vertical run with a camera, clean where needed, then seal your connection with proper transition fittings and mastic. For Grapevine condo associations, we can also propose a maintenance schedule for the shared stack. Call (361) 326-5060 to schedule a building assessment.
Grapevine’s humid subtropical climate means your ducts are under constant moisture stress. When cool air leaks into a hot, humid attic or crawlspace, the temperature differential creates condensation at the leak point – which degrades mastic, rusts metal, and breeds mold. Sealing stops the air leakage, which stops the condensation cycle. But we also check that your condensate drain is clear and your system isn’t oversized, because an oversized AC short-cycles and doesn’t run long enough to dehumidify properly. Sealing helps, but it’s one part of a system that has to work together in Grapevine’s climate. Call (361) 326-5060 and we’ll evaluate the full picture.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Grapevine and the Dallas-Fort Worth area since 2004.