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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AfterFast, Reliable Duct Sealing Across Keene
Your Keene home’s cooling bills keep climbing, and the upstairs bedrooms never quite reach the temperature you’ve set on the thermostat. In a town where summers stretch from April through October and the Hill County humidity wraps around your house like a wet blanket, leaking ducts force your HVAC system to run longer, work harder, and wear out faster than it should. We seal ducts for homeowners throughout Keene, from the established neighborhoods near Southwestern Adventist University to the newer subdivisions popping up along the edges of town. Our crews are dispatched from our Dallas-Fort Worth office, and we schedule Keene appointments with arrival windows we actually keep. Call (361) 326-5060 to book a free estimate.
Why Hollis Air Duct Cleaning Is Keene’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our reputation in Keene has been built one job at a time, not through billboard saturation. In a university town this size, word travels fast. When we seal ducts at a home on Old Betsy Road and the homeowner’s sister in the newer development off FM 2280 calls us the next month, that’s the kind of repeat pattern we see here.
Our technicians arrive in uniform, background-checked, with the job details already reviewed. The Garrison Code requires it. We price every duct sealing job in writing before any mastic goes on, and that price is covered by our 365-Day Done Right Promise. If a seal fails within a year, we come back and fix it at no charge, including the second visit.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no “leave a message and we’ll call back Monday.” When you’re trying to figure out why your July electric bill hit $400, you talk to a human who can get you scheduled.
Air Duct Sealing in Keene
Air Duct Sealing in Keene addresses the gaps, separations, and deterioration in your home’s duct network that allow conditioned air to escape into attics, crawl spaces, and wall cavities before it ever reaches your living space. Most Keene homes we inspect lose 20 to 30 percent of their heated or cooled air through these leaks, which means you’re paying to condition air that never enters a room. The combination of North Central Texas’ long cooling season and Keene’s particular mix of 1970s ranch homes with aging rigid metal duct and newer builds with flex duct makes this problem especially costly here.
A typical whole-home duct sealing job in Keene runs $1,200 to $2,800, depending on duct accessibility, the extent of leakage confirmed by pre-testing, and whether we need to seal from inside the ductwork or access leaks through the attic. We use mastic sealant and metal-backed tape, not the hardware-store foil tape that peels off after two summers in a Keene attic.
How We Test Before We Seal
Every job starts with a pressure test. We pressurize your duct system and measure the leakage rate in CFM25, cubic feet per minute at 25 pascals of pressure. This gives us a baseline and shows us exactly where your money is disappearing. In older Keene homes near the university, we regularly find disconnected trunk lines buried under decades of blown-in insulation that the homeowner never knew existed.
What Sealing Material Actually Lasts
We apply water-based duct mastic with a UL 181 rating, brushed or sprayed onto joints and seams, then reinforced with mesh for larger gaps. In Keene’s attics, where summer temperatures exceed 140 degrees and winter freezes occasionally drop below 20, the material has to survive constant thermal cycling. Mastic remains flexible; tape does not.
Duct Sealing Services in Keene
Duct Sealing Services in Keene from Hollis cover the full range of residential duct repair and air loss remediation, from spot-sealing disconnected flex duct in new construction to comprehensive restoration of original galvanized systems in homes built during the 1970s and 1980s. Our crews carry Rotobrush rotary systems and Nikro negative-air equipment, the same tools used in commercial jobs, because Keene’s duct problems range from simple to genuinely complex. We also handle Air Duct Cleaning in Keene and Dryer Vent Cleaning in Keene when a full-system approach makes more sense than sealing alone.
Most homeowners in Keene call us after noticing one of three things: rooms that won’t cool evenly, utility bills that jumped without explanation, or dust blowing from registers even after changing filters. All three point to duct leakage pulling attic air, insulation fibers, and pollen directly into the airflow.
Attic Access and Rigid Duct Repair
Many Keene homes, especially the ranch-style builds on the north side of town, have original galvanized steel duct with threaded rod supports. The seams on these systems loosen over forty-plus years of expansion and contraction. We re-seal the longitudinal seams, repair or replace damaged sections, and verify with post-test pressure readings.
Flex Duct in Newer Construction
The subdivisions expanding around Keene’s outer edges often use flex duct with zip-tie connections at the plenum. Builder crews working fast sometimes leave gaps at these junctions, or crush the flex with tight straps that restrict airflow. We remove the defective connections, install proper collars, and seal with mastic rated for the application.
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 Keene
Our trucks stock sealing and filtration products from Abatement Technologies, Guardsman, and Rotobrush, which means we don’t order parts and make you wait. When we find a compromised section of duct that needs more than sealing, we can replace it during the same visit. For homeowners adding filtration after sealing, we carry Honeywell and Aprilaire media filters sized to the Keene market’s common system configurations. The goal is one trip, one written price, one completed job.
Common Duct Sealing Problems We See in Keene Homes
- Insulation infiltration in older attics. In the neighborhoods near Southwestern Adventist University, technicians often find ducts clogged with a mix of attic insulation fibers and decades of cedar pollen. When the duct seams leak, the negative pressure pulls this debris directly into your breathing air, and the only fix is sealing the entry points.
- Disconnected flex duct at the plenum. Newer Keene builds with builder-grade installation sometimes have flex duct that has pulled completely away from the air handler. The homeowner feels weak airflow and assumes the AC is failing; in reality, half the conditioned air is dumping into the attic.
- Failed tape on rigid metal seams. Original duct systems from the 1970s and 1980s were sealed with tape that degrades after years of Keene attic temperature swings, summer heat above 140 degrees followed by winter freezes. The tape turns to powder, and the seams open.
- Leaky return air pathways. Many Keene homes draw return air through wall cavities and floor joist channels rather than dedicated ductwork. These pathways pull air from attics, crawl spaces, and garages, pressurizing your home with unfiltered, unconditioned air. Sealing requires access and mastic application to every penetration.
Pricing for Duct Sealing in Keene, TX
Whole-home duct sealing in Keene typically costs between $1,200 and $2,800. Spot sealing of a specific problem area, such as a disconnected flex run or a leaking plenum connection, runs $350 to $750. The final price depends on three factors: the size of your duct system, how accessible the ductwork is in your attic or crawl space, and the leakage rate we measure during pre-testing.
We do not quote per-vent or per-register pricing. That structure encourages corner-cutting and hides the true scope of the job. Instead, we test your system, show you the leakage locations, and give you one flat price for the complete sealing work before any mastic is opened. If the post-test shows we haven’t hit the target leakage reduction, we keep working at no additional charge.
Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Keene
Our crews regularly travel from Keene to Duct Sealing in Keene and surrounding communities including Cleburne, Joshua, Alvarado, and Burleson. If you’re unsure whether your address falls in our service radius, call (361) 326-5060 and we’ll confirm.
Serving Keene, TX - Our Local Coverage Area
We’re based in the Keene 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 Keene
We typically schedule Keene appointments within three to five business days, with arrival windows we confirm by text the morning of the job. Call (361) 326-5060 for next available openings.
Yes, we seal ducts throughout Keene, from the older homes near Southwestern Adventist University to the new subdivisions along the town’s expanding edges. Our technicians are familiar with the specific duct configurations common in each area.
We do not offer after-hours emergency dispatch for duct sealing, as it is a scheduled maintenance and repair service rather than an urgent safety issue. If you have a complete duct collapse or AC failure, we can often schedule next-day service. Call (361) 326-5060 to discuss urgency.
Pricing is comparable to Cleburne and Burleson, though older Keene homes with rigid galvanized duct in cramped attics sometimes require more labor than newer construction with open crawl spaces. Your written estimate reflects your specific home, not your zip code.
Every duct sealing job is covered by our 365-Day Done Right Promise in writing. If any sealed joint fails within one year, Hollis returns and repairs it at no charge, including the second visit. This applies to all Keene customers and is backed by the Garrison Standard, not a verbal assurance.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Keene and the Dallas-Fort Worth area since 2004.