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
Before
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Before
AfterFast, Reliable Duct Sealing Across Mansfield
We seal ducts in Mansfield homes where wind-driven rain has found its way into attic runs, where new construction flexwork has pulled loose, and where years of expansion and contraction in a Texas attic have opened seams that bleed conditioned air into the wrong spaces. Our crews dispatch from the Dallas-Fort Worth office and carry the tools to test, document, and seal duct systems the same visit – mastic, foil tape, negative-air rigs, and cameras that let you see what we see. If you’re in Mansfield and your ducts smell musty after a storm, your upstairs rooms won’t cool, or your power bill has climbed without explanation, call (361) 326-5060. We’ll give you a written price before we start, and every seal is covered by our 365-Day Done Right Promise.
Why Hollis Air Duct Cleaning Is Mansfield’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Duct Sealing team knows the difference between a Mansfield home built in the 1980s near historic downtown and a two-story build from 2019 off Matlock Road. That local knowledge matters because the duct materials, attic layouts, and failure modes are completely different.
Our technicians are background-checked and uniformed, and they arrive inside the quoted window – not “sometime Tuesday,” but between 8 and 10 a.m. if that’s what we wrote down. The price is written before any work starts. If a seal fails within a year, we come back at no charge, including a free second visit. That’s not a slogan; it’s in writing on every job.
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 when your attic is dripping.
Air Duct Sealing in Mansfield
Air Duct Sealing in Mansfield means closing the gaps, seams, and disconnections in your forced-air system so the air you’ve paid to heat or cool actually reaches the rooms it’s supposed to serve. In this market, we see two distinct scenarios: older homes near downtown with metal ductwork that has separated at joints after decades of vibration, and newer homes in master-planned communities where flexible ductwork has pulled loose from boots or been damaged during construction. A typical whole-system seal in Mansfield runs $450 – $1,200 depending on accessibility, the extent of damage, and whether we’re addressing a single zone or multiple HVAC zones.
Camera Inspection Before Sealing
We run a camera through the full duct run before we quote. This lets us show you exactly where the leaks are, measure the size of gaps, and spot moisture or mold that would make sealing the wrong call. In Mansfield’s newer subdivisions, we often find construction debris – drywall dust, wood scraps, even discarded tape rolls – that needs removal before any sealant goes on.
Negative-Air Testing After the Seal
Once we’ve sealed with mastic and foil tape, we pressurize the system and measure leakage at the return and supply plenums. If the numbers don’t meet our standard, we reopen and reseal until they do. This verification step is what separates a proper seal from a guess.
Duct Sealing Services in Mansfield
Duct Sealing Services in Mansfield cover everything from spot repairs at a single disconnected boot to full-system restoration after storm intrusion. Our crews carry professional-grade equipment from Rotobrush and Abatement Technologies, plus filtration products from Honeywell and Aprilaire when your system needs component replacement alongside the seal. We do not quote per-vent pricing or teaser rates that balloon once we’re inside your home. A typical spot seal runs $180 – $340; a full-system seal with multiple zones and attic access runs $850 – $1,400.
Post-Storm Assessment and Documentation
After wind-driven rain enters attic duct runs, the first question is whether the duct can be sealed or must be replaced. We document moisture readings with calibrated meters, photograph the full length of affected flexwork, and produce an itemized report that insurers accept. Sealing over wet duct is worse than doing nothing – the mastic traps moisture, and mold blooms behind it within a season.
Roof-Jack and Attic Boot Sealing
The entry point for storm water is often a roof-jack boot or attic penetration, not the duct itself. We seal these penetrations with mastic and reinforced foil tape rated for Mansfield’s attic heat cycles, which regularly exceed 100°F in summer. Low-grade tape adhesive fails within a year under these conditions.
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 Mansfield
We stock parts and filtration products from Honeywell, Aprilaire, and Guardsman, and we carry the sealants and tapes that Abatement Technologies specifies for commercial-grade work. This means most Mansfield jobs don’t wait on parts orders. If your system uses a Honeywell media filter or an Aprilaire whole-house dehumidifier tied to the duct network, we can assess whether that component contributed to the leak path and address it in the same visit. Fast turnaround matters when your upstairs bedroom is 85 degrees in July or when an insurer is waiting on documentation to approve a claim.
Common Duct Sealing Problems We See in Mansfield Homes
- Wind-driven rain in newer subdivisions. Homes near Mansfield National Golf Club and similar master-planned developments often have flexible ductwork in attic spaces where roof-jack boots were improperly sealed during construction. A spring storm pushes water directly into the return plenum, and the homeowner smells it before they see any ceiling stain.
- Construction debris in flex runs. Mansfield’s building boom from the 1990s onward means thousands of homes have ducts that were never fully cleaned after the drywall crews left. Dust and debris accumulate at low points, restricting airflow and creating back-pressure that pulls seams apart.
- Adhesive failure from attic heat. Standard foil tape used by builders degrades in Mansfield’s 100°F+ attic temperatures. The adhesive softens, the tape peels, and conditioned air leaks into the attic for years before anyone notices the power bill.
- Multiple-zone complexity. Newer Mansfield homes often have three or four HVAC zones with dampers that create pressure imbalances. When one zone is closed, excess pressure blows out seals in another zone. Sealing without testing the full system under all zone configurations misses the real problem.
Pricing for Duct Sealing in Mansfield, TX
A typical duct sealing job in Mansfield runs $450 – $1,200 for whole-system work, with spot repairs at $180 – $340. What moves the price: attic accessibility (crawl vs. walk-in), the number of HVAC zones, whether we need to remove wet or contaminated flex duct before sealing, and whether the job requires post-seal negative-air verification for insurer documentation. We do not charge per vent. We do not bait with a low coupon and add fees at the door. The price is written down before we touch your system, and it does not move. Estimates are free. Call (361) 326-5060 for an exact quote based on your home’s layout and what we find during inspection.
We Also Serve Cities Near Mansfield
Our crews work throughout the southern Tarrant and northern Johnson County area, including Mansfield and the nearby cities of Arlington, Kennedale, Venus, and Burleson. The same written pricing, same 365-Day Done Right Promise, same live-answer phones apply across the full service area.
Serving Mansfield, TX - Our Local Coverage Area
We’re based in the Mansfield 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 Mansfield
We decide based on moisture content, contamination level, and structural integrity of the flex duct. If moisture readings exceed 16% wood-equivalent moisture content, or if mold is visible on the interior liner, we recommend replacement – sealing over wet or moldy duct traps the problem and guarantees failure within a season. If the duct is merely damp at the connection point and the liner is intact, we can dry, seal, and verify. Call (361) 326-5060 for a free post-storm inspection and written recommendation.
Yes. Clay soil expands and contracts dramatically with moisture, which stresses slab-mounted air-handler platforms and can shift duct connections at the plenum. Combined with construction debris left in new flex runs, this creates leak paths that pure sealing won’t fix – we often need to clean and sometimes replace sections before sealing properly.
Yes, and we test under all zone configurations, not just with everything open. Multiple-zone systems develop pressure imbalances that blow out seals when dampers close. Our negative-air test verifies integrity across every zone combination so the seal holds under real operating conditions.
The insurer needs dated moisture readings, photographs of the affected duct interior and exterior, a description of the water entry point, and an itemized scope of work with line-item costs. We provide all of this in a single document. After a spring hail-and-wind event near Mansfield National Golf Club, a homeowner in one of the newer two-story builds called us because the second-floor return ducts smelled musty and the Aprilaire filter was damp. Our tech ran a camera inspection and found wind-driven rain had entered through a roof-jack boot, soaking about 20 feet of flex run above the bonus room. We pulled the wet run, documented it with moisture readings and photos, sealed the rebuilt section with mastic and foil tape under negative pressure, and left the homeowner with an itemized report the insurer accepted on the first submission.
We do seal dryer vent connections where they meet the wall penetration or where flex hose has pulled loose from the back of the dryer. In Mansfield, lint accumulation is accelerated by the fine construction dust that circulates in newer neighborhoods, and a leaky dryer vent dumps that lint into the wall cavity or attic, creating both fire risk and moisture problems. The seal is quick – usually $120 – $220 – and we verify airflow at the exterior termination.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Mansfield since 2004.