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.
Fast, Reliable Duct Sealing Across Krum
Your ducts are leaking. Maybe you’ve noticed the upstairs bedroom in your Krum home never cools down, or your electric bill jumped after another brutal North Texas summer. Duct sealing in Krum typically runs $850 – $2,400 for a whole-home seal, and most jobs finish in a single day. Call (361) 326-5060 for a free written estimate.
We dispatch to Krum from our Dallas-Fort Worth scheduling office, and our crews know the area well enough to spot the patterns: the 1970s ranch on FM 1173 with sagging flex duct in the attic, the new build off Masch Branch Road where construction crews left gaps at every register boot. Roy Castellanos and our team have sealed ducts in Krum homes that back up to open farmland, near the grain elevators, and in the newer subdivisions feeding commuters toward Denton and Fort Worth. That local context changes what we look for and how we fix it.
Why Hollis Air Duct Cleaning Is Krum’s Preferred Duct Sealing Company
Krum homeowners don’t hire us because we’re the cheapest. They hire us because the price we write down is the price they pay, and because our Duct Sealing team stands behind that number with a 365-Day Done Right Promise in writing.
We’ve worked in enough Krum homes to know the local duct problems by sight. The flexible ductwork from the 1980s turns brittle in Texas attics. New construction often has code-minimum sealing that fails within the first two years. After a spring storm rolls through Tornado Alley, we find roof leaks that have soaked duct insulation and loosened tape seals. That kind of pattern recognition only comes from working the same towns repeatedly.
Our technicians are background-checked, uniformed, and trained to 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. No exceptions. Roy Castellanos built this standard into Hollis Air Duct Cleaning from day one, and every Krum job gets the same discipline.
Calls are answered by a live person, 24 hours a day, 7 days a week. No voicemail loops. No callback queues. When you’re ready to stop throwing money into a leaky duct system, you reach a human who can get you scheduled.
Air Duct Sealing in Krum
Air Duct Sealing in Krum means finding and closing every gap, seam, and connection point where conditioned air escapes your ductwork before it reaches your rooms. In a town where summer AC runs constantly and spring storms drive grit through attic vents, those leaks cost more here than in milder climates. A typical whole-home seal in Krum runs $850 – $2,400 depending on system size, attic accessibility, and whether we’re working with original flex duct or newer rigid metal.
What the Process Looks Like
We start with a pressure test to measure exactly how much air your system is losing. Then we seal accessible joints with mastic, a thick paste that flexes with temperature changes better than tape alone. For hard-to-reach leaks, we apply aerosol-based duct sealant that travels through the pressurized system and bonds at leak points. You’ll see the before-and-after pressure numbers in writing before we pack up.
When Krum Homes Need It Most
Homes near Krum’s open fields and grain elevators collect heavier, grittier dust than typical household dust, and that grit accelerates seal deterioration. If your home was built between 2018 and 2023 in one of Krum’s rapid-growth subdivisions, construction debris in the ducts may have already compromised the original seals. We check both scenarios on every job.
Duct Sealing Services in Krum
Duct Sealing Services in Krum cover everything from spot repairs at single registers to full-system restoration for homes with decades-old flexible ductwork. Roy Castellanos and our crews treat this as a building science job, not a tape-and-hope shortcut. The goal is measurable: lower static pressure loss, more even temperatures room to room, and HVAC equipment that doesn’t cycle itself to death compensating for leaks. Whole-home sealing in Krum typically falls between $850 and $2,400, with partial repairs starting around $350 – $600.
Attic Duct Restoration
Krum’s 1970s and 1980s homes on acreage often have original flex duct that’s been cooking in attic temperatures above 140 degrees for forty-plus years. We remove deteriorated sections and replace them with properly insulated rigid or flex duct, then seal every connection with mastic and mechanical fasteners. The work is photographed before, during, and after.

New-Construction Seal Upgrades
Energy-efficient homes in Krum’s newer subdivisions are built tight, which is good, but the original duct sealing is often code-minimum and fails fast under constant summer load. We return to seal register boots, plenum connections, and trunk line joints with materials that outlast the builder-grade tape originally installed.

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 Krum
Our equipment comes from manufacturers that commercial crews trust, not hardware-store brands. We run Rotobrush rotary brush systems and Nikro negative-air machines for duct access and pre-seal cleaning, and we stock sealing products from Abatement Technologies and Guardsman for repairs that hold up in Krum’s demanding climate. When a Krum homeowner needs a seal that survives another North Texas summer and another spring storm season, we don’t guess at materials. We use what the trade specifies, and we explain the choice in plain terms while we’re working.
Common Duct Sealing Problems We See in Krum Homes
- Storm debris in attic ducts. Krum’s position in Tornado Alley means spring storms don’t just bring rain. Wind-driven grit and occasional asphalt shingle granules find their way into attic duct runs through gaps in soffits or roof damage, abrading seals and clogging insulation.
- Brittle flex duct from the 1970s – 80s. The older ranch homes on Krum’s acreage often have original flexible ductwork that’s hardened and cracked from decades of attic heat. Tape seals fail, joints separate, and the system leaks more air than it delivers.
- Construction dust in new subdivisions. Krum’s rapid growth as a bedroom community has produced tight, efficient homes with duct systems still full of drywall dust and debris from the build. That grit works into register boots and loosens original seals within the first two years.
- Well-water humidity effects. Many Krum homes run on well water and septic systems, and the higher baseline humidity in some areas accelerates corrosion at metal duct joints and degrades tape adhesives faster than in city-water neighborhoods.
Pricing for Duct Sealing in Krum, TX
Whole-home duct sealing in Krum runs $850 – $2,400. Partial repairs for specific problem zones start at $350 – $600. What moves you within that range: how many air handlers and duct runs we’re sealing, whether we’re working in a walkable attic or crawling through blown insulation, and if we’re replacing deteriorated flex duct or just sealing existing materials.
We do not quote per-vent or per-linear-foot teaser prices that balloon once we’re inside. The price is written down before any work starts, and it does not move at the door. That written estimate includes the full scope, the materials we’ll use, and the 365-Day Done Right Promise. If the seal fails within a year, we return and make it right at no charge, including a free second visit.
Every Krum estimate is free. No obligation. You’ll know the exact number before you decide.
We Also Serve Cities Near Krum
Our crews work throughout Denton County and the northern Dallas-Fort Worth corridor. We regularly seal ducts in Krum, Sanger, Denton, Argyle, and Justin. If you’re in one of these neighboring towns and your system is leaking conditioned air into the attic, the same pricing structure and written guarantee apply. We also handle Air Duct Cleaning in Krum and Dryer Vent Cleaning in Krum for homeowners who want the full system addressed in one visit.
Serving Krum, TX - Our Local Coverage Area
We’re based in the Krum 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 Krum
Whole-home duct sealing in Krum typically costs $850 – $2,400, with partial repairs starting at $350 – $600. The exact price depends on system size, attic accessibility, and whether we’re replacing deteriorated ductwork or sealing existing materials. Call (361) 326-5060 for a free written estimate with no obligation.
Most Krum duct sealing jobs finish in one day, usually four to six hours for a typical single-system home. Larger homes, crawlspace ductwork, or jobs requiring flex duct replacement may extend into a second day. We tell you the expected duration in writing with the estimate.
Yes. We seal ducts throughout Krum, from the older homes on acreage near FM 1173 to the newer subdivisions off Masch Branch Road and the properties near the Krum High School area. Our Dallas-Fort Worth dispatch office coordinates scheduling for all Krum addresses with the same arrival window commitment.
Our pricing is consistent across Krum, Sanger, Denton, Argyle, and Justin. The same written estimate format and rate structure apply. What affects your price is your specific home’s duct system, not your ZIP code. Krum’s mix of older rural homes and new construction does create more variable job scopes than denser urban areas, but we price each home individually after inspection.
If any sealed joint fails, any mastic application cracks, or any aerosol sealant bond breaks within one year of service, Hollis Air Duct Cleaning returns to repair it at no charge. This includes a free second visit, parts, and labor. The promise is written on every Krum job, not implied or verbally promised. Call (361) 326-5060 if you suspect a problem, and we’ll schedule the return trip.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Krum and the Dallas-Fort Worth area since 2004.




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