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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across University Park
Duct sealing in University Park typically runs $800 – $2,400 for a whole-home system, with most jobs completed in a single day once access is scheduled around alley-only staging. We dispatch crews from our Dallas-Fort Worth office and route them directly to University Park homes, including those tucked behind the mature oak canopy along Lovers Lane and the narrow streets near Snider Plaza. If your registers are blowing gray debris or your upstairs rooms won’t cool, the problem is often leaky attic ductwork pulling hot, humid air from unconditioned spaces. Call (361) 326-5060 for a free estimate with a written price before any work starts.
Why Hollis Air Duct Cleaning Is University Park’s Preferred Duct Sealing Company
We’ve worked in University Park long enough to know the difference between a 1940s bungalow off Hillcrest with original galvanized ducts and a teardown-rebuild on Marquette Street with flex duct full of construction dust. That local knowledge matters because the sealing method changes completely. Our Duct Sealing team arrives in uniform, background-checked, and equipped with Rotobrush rotary systems and Nikro negative-air machines, the same tools commercial crews use on larger jobs.
Our 365-Day Done Right Promise covers every sealing job in writing. If a seal fails or a joint reopens within a year, we return and make it right at no charge, including a free second visit. No negotiating, no runaround. We price every job in writing before touching equipment, and that price does not move when the technician walks through your door. Phones are answered by a live person 24 hours a day, seven days a week, so you can schedule around University Park’s alley-access constraints without waiting for a callback.
Duct Sealing Services in University Park
Duct Sealing Services in University Park address the leaks, gaps, and disconnected joints that waste conditioned air in attics where summer temperatures regularly hit 140°F. We seal supply and return plenums, register boots, and longitudinal seams using Guardsman mastic and reinforced mesh, applied after negative-pressure source removal so we’re bonding to clean metal, not dust or degraded insulation. A typical whole-home duct sealing job in University Park runs $800 – $2,400 depending on system size, attic accessibility, and whether we’re working around original 1950s metal or newer flex duct. Most single-family homes in the 75205 and 75225 zip codes fall in the $1,200 – $1,800 range.
Post-Storm Damage Assessment and Sealing
After spring hail and heavy rains, we inspect fresh-air intakes and attic returns for water intrusion before sealing anything. Sealing over wet ductwork traps mold and gets your insurance claim denied. We document moisture levels with photo logs and meter readings, seal only dry, salvageable runs, and flag saturated sections for replacement with written justification.
Mastic Sealing for Older Metal Ductwork
Original 1950s galvanized ducts in University Park ranch homes develop pinhole corrosion and separated drive cleats. We clean the metal surface with rotary brushing, then apply Guardsman mastic in two coats with fiberglass mesh reinforcement. This outlasts tape and creates a permanent seal that won’t degrade in attic heat.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Duct Insulation in University Park
Duct Insulation in University Park replaces or supplements the thermal barrier around attic ductwork, critical in homes where original 1960s-era wrapping has degraded into the gray debris blowing from registers every June. We install new foil-faced fiberglass or closed-cell foam insulation around sealed ducts, reducing thermal loss by 20 – 30% and stopping condensation that breeds mold in humid attics. Typical duct insulation in University Park runs $600 – $1,800 for a whole system, with smaller 1950s ranch homes on 50-foot lots toward the lower end and larger custom builds near Goar Park at the higher end.
Insulation Replacement After Degradation
When attic temperatures hit 140°F, failing fiberglass insulation flakes apart and gets pulled into supply ducts. We remove the degraded material with HEPA-contained negative air, seal the bare metal underneath, then wrap with new R-6 or R-8 insulation secured with vapor-barrier tape.
Condensation Control in Humid Attics
University Park’s mature tree canopy traps moisture in attics even when outdoor humidity drops. Uninsulated or poorly insulated cold-air ducts sweat, soaking ceiling drywall and breeding microbial growth. Proper insulation after sealing eliminates this condensation point.
Trusted Brands We Service in University Park
We stock parts and materials from Honeywell, Aprilaire, and Abatement Technologies for University Park jobs, with Guardsman mastic and Nikro HEPA filtration equipment on every truck. This means no waiting for a parts run to Dallas when we find a compromised section during sealing. Our Rotobrush rotary systems handle the tight attic spaces common in University Park’s original housing stock, and our negative-air machines maintain containment even when working through narrow alley access. Fast turnaround matters after storm damage, when insurers want documentation quickly and homeowners need systems restored before the next heat wave.
Common Duct Sealing Problems We See in University Park Homes
- Gray debris from degraded 1960s insulation: Every summer we get calls from University Park homeowners who turn on their AC for the first time and find gray fibrous material blowing from registers. This is failing attic duct insulation, not dust, and sealing over it without removal just traps the debris in your breathing air.
- Storm water intrusion through fresh-air intakes: University Park’s spring hailstorms and driving rains push water into outdoor returns and attic intakes. Sealing wet ducts without documentation traps mold and voids insurance coverage. We moisture-test first, photo-log everything, and seal only dry runs.
- Undersized original ductwork in pre-AC homes: Many University Park homes were built before central air, with ducts added later that are too small for modern loads. Sealing helps, but cannot overcome inadequate airflow. We measure static pressure and CFM to tell you when sealing is worth doing versus when duct replacement is the honest answer.
- Alley-access crews skipping containment setup: Because University Park requires rear-alley staging, some operators skip the full negative-pressure and HEPA filtration setup to save time. This leaves debris in the system that gets pulled through newly sealed joints. We bring the full rig every time, even if it means more coordination with alley access.
Pricing for Duct Sealing in University Park, TX
Whole-home duct sealing in University Park typically costs $800 – $2,400, with most homes falling between $1,200 and $1,800. Duct insulation runs $600 – $1,800. What moves the price: system size (a 1,200-square-foot ranch off Purdue versus a 4,000-square-foot new build near Goar Park), attic accessibility (tight original access hatches versus walk-in scuttles), and whether we’re sealing sound original metal or replacing degraded flex sections first. We give one flat price per system, agreed in writing before work starts. No per-vent pricing, no add-ons at the door. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near University Park
Our crews work throughout the Dallas-Fort Worth metro, including Duct Sealing in University Park and surrounding cities. We regularly schedule jobs in Houston, San Antonio, Dallas, and Fort Worth, with dispatch coordinated from our Dallas-Fort Worth office to maintain consistent arrival windows and equipment standards across every location.
Serving University Park, TX - Our Local Coverage Area
We’re based in the University Park 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 University Park
We can seal storm-damaged ducts only after source removal and moisture documentation prove the metal is dry and structurally sound. After a May hailstorm pushed water through a fresh-air intake on a 1954 ranch off Purdue Street, our tech ran camera inspection and found wet, matted insulation inside the original attic supply and return ducts; we set up negative pressure with a Rotobrush and Nikro HEPA filtration, performed source removal, and sealed the compromised runs with Guardsman mastic rather than replacing them. The homeowner’s insurer accepted our photo-and-moisture log because it documented dry, salvageable ductwork versus the water-saturated flex section we flagged for replacement. Saturated flex duct or standing water in metal plenums means replacement, not sealing. Call (361) 326-5060 and we’ll inspect and document for your insurer.
It’s degraded fiberglass insulation from your original 1960s attic duct wrapping, flaking apart after decades of 140°F summer heat exposure. Many 1950s ranch homes in University Park still have this failing insulation; when attic temperatures peak, the material breaks down and gets pulled into supply ducts by the blower motor. Sealing without removing this debris just traps it in your airflow. We remove the old insulation with HEPA-contained negative air, seal the bare metal, and install new R-6 or R-8 wrapping. Call (361) 326-5060 for an inspection.
Yes. Because University Park is landlocked with alley-only utility access and strict right-of-way permitting, a duct-sealing rig here is staged in the rear alley and worked through the attic, never curbside. Post-flood and post-storm sealing jobs are scheduled around narrow-street access rather than truck-to-curb convenience like the rest of Dallas. This takes more coordination but does not change our equipment standard: full negative-pressure setup, HEPA filtration, and photo documentation on every job. Call (361) 326-5060 and we’ll coordinate alley access with your schedule.
We provide a photo-and-moisture log with dated meter readings, camera inspection footage, and written determination of which runs are salvageable versus which require replacement. Insurers deny claims when sealing is performed over undocumented moisture or mold. Our documentation distinguishes dry, sealed metal from water-saturated sections flagged for replacement, with the technical justification an adjuster needs. The Garrison Standard requires this paperwork on every post-storm job. Call (361) 326-5060 and we’ll walk you through what your carrier will need.
Sealing improves airflow in undersized ducts but cannot overcome inadequate capacity. Many University Park homes built before central air have original ductwork that is simply too small for modern cooling loads, even when perfectly sealed. We measure static pressure and CFM to give you an honest answer: if sealing will deliver meaningful improvement versus when duct replacement is the only real fix. We do not sell sealing as a Band-Aid for fundamentally inadequate systems. Call (361) 326-5060 for testing and a written recommendation.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving University Park since 2004.