Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Trusted Duct Sealing for Fort Worth Homeowners
Fort Worth Duct Sealing typically costs $850 to $2,400 for a full system, depending on home size, duct accessibility, and how much leakage the system has. The work usually takes one day, and it stops conditioned air from bleeding into attics, crawl spaces, and wall cavities before it ever reaches your bedroom or living room. Leaky ducts in Fort Worth homes regularly waste 20 to 30 percent of the air your HVAC system pushes through them, which means you’re paying to heat and cool spaces nobody lives in.
Hollis Air Duct Fort Worth has done this work since 2004, and our sealing crews carry professional-grade equipment from home brands like Rotobrush and Nikro. Roy Castellanos runs our Fort Worth operation under The Garrison Standard, which means a written price before we touch anything, background-checked technicians in uniform, and a 365-Day Done Right Promise on every job. If the seal fails within a year, we come back at no charge. Call (682) 255-2572 for a free estimate.
Duct Insulation
Duct Insulation is the layer of thermal wrap or rigid board that goes around ductwork to keep conditioned air at the right temperature as it travels from your furnace or air handler to the rooms that need it, and uninsulated ducts in a hot Fort Worth attic can lose 10 to 15 degrees of cooling before the air ever reaches a register. When ducts run through unconditioned spaces like attics, garages, or crawl spaces, insulation is not optional, it’s the difference between a system that cools your house and one that cools your attic. Hollis Air Duct Fort Worth inspects the insulation on every sealing job because a sealed duct with degraded wrap still bleeds temperature, and we replace or add insulation wherever the existing material has compressed, torn, or pulled away from the duct body.
When Fort Worth Attics Destroy Insulation
Fort Worth summers push attic temperatures past 140 degrees, and that heat cooks fiberglass duct wrap over time. We see homes in Sansom Park, Duct Sealing - Haltom City area, and River Oaks where insulation has literally crumbled off the duct surface, leaving bare metal exposed to the heat. The fix is new wrap, properly secured, before sealing work begins.
Insulation and Sealing Working Together
Sealing stops air from escaping. Insulation stops temperature from bleeding through the duct wall. A duct that leaks sealed air into a hot attic defeats the purpose of the whole system, so our crews treat insulation and sealing as one job, not two separate line items. Expect the insulation portion to run $300 to $800 depending on how much ductwork runs through unconditioned space.
Styles & brands we work with
HVAC Duct Sealing
HVAC Duct Sealing is the process of closing every joint, seam, and connection point in your duct system so air moves from the blower to your registers without leaking into spaces you don’t condition, and most Fort Worth homes built before 2010 have ducts sealed with foil tape that dried out and failed years ago. When we seal HVAC ductwork, we use duct mastic, a thick paste that brushes on wet and cures into a flexible, permanent seal that doesn’t crack when the metal expands and contracts through a Texas winter-to-summer swing. The job usually runs $850 to $2,400 depending on system size and access, and it’s the single highest-impact repair most older homes in Fort Worth can get for their comfort and utility bill.
Where the Worst Leaks Hide
The biggest leaks are almost never in the visible runs. They hide at the plenum connection, where the main trunk meets the air handler, and at register boots behind drywall. Our technicians use a negative-air inspection setup to identify exactly where the system is losing pressure before any mastic goes on.
Why Tape Fails and Mastic Doesn’t
Foil tape has an adhesive that gives out after three to five years of attic heat cycling. Mastic bonds to the metal itself and stays flexible for decades. When you see gray brush marks on duct joints, that’s mastic done right, and it’s what we use on every HVAC duct sealing job in Fort Worth.
Duct Repair
Duct Repair is the hands-on fix for ductwork that has been crushed, disconnected, chewed through, or rusted out, and in Fort Worth it’s a job that usually runs $175 to $600 per damaged section depending on how much of the run needs to be replaced and how hard it is to reach. Homes in older neighborhoods like Ridglea Hills and Carter-Riverside routinely show up with duct runs that have separated at the joints entirely, which means a percentage of your conditioned air is blowing straight into the attic and never reaches the house. Hollis Air Duct Fort Worth repairs damaged sections before sealing because you can’t seal a duct that has collapsed, and we always show you photos of the damage before we touch it so you know exactly what you’re paying for.
What Damages Ductwork in Fort Worth
Pests are the number one cause we see, rats and squirrels in attics chewing through flex duct to nest in the warmth. The second is sloppy work from previous contractors, crushed ducts where someone crawled across them, and disconnected runs that were never properly strapped. Both problems are fixable in a single visit.
Repair Before You Seal
Sealing a duct system with a crushed section or disconnected joint wastes your money. The sealing job only works if the ductwork is structurally sound, so our process always includes a full inspection and repair pass before any mastic or wrap goes on. We’ll give you a written price for repair work and sealing work as separate line items, agreed before we start.
Air Duct Sealing
Air Duct Sealing is the same job as HVAC duct sealing, the complete closure of your air distribution system from air handler to register, and the term refers to the fact that you’re sealing the path your air travels, not just the sheet metal it travels through. A properly sealed air duct system in Fort Worth holds its pressure, so the air you pay to condition arrives at the room at the temperature it left the unit. Depending on home size and duct configuration, air duct sealing in Fort Worth runs $850 to $2,400, and it’s usually completed in a single day with no demolition and no drywall work required.
What a Sealed System Feels Like
After we seal, homeowners notice the rooms at the end of long duct runs finally get as cool as the rooms near the air handler. That’s the whole point: balanced air distribution. If your back bedroom has always run five degrees warmer than the kitchen, leaky ducts are usually the reason.
Sealing Methods We Use
We use brush-applied mastic for all accessible joints and seams, and for hard-to-reach sections we use aerosolized sealing under negative pressure when the system design calls for it. Both methods are commercial-grade, and both are done with the same Rotobrush and Nikro equipment we use on our Duct Sealing in Southlake jobs. You get a written guarantee on the seal for a full year.
Duct Sealing Services
Duct Sealing Services cover everything from a single leaking joint to a complete system seal, and the scope depends on what our inspection finds, Duct Sealing in Kennedale and a full Fort Worth home typically runs $850 to $2,400 while a targeted single-joint repair might come in under $250. The difference matters because some companies will quote you a low number over the phone, then try to expand the job once they see your attic. We don’t work that way. Our price is written down before any work starts, and it doesn’t move at the door, that’s The Garrison Standard that Roy Castellanos has enforced on every job since 2004.
Full-System versus Spot Sealing
Spot sealing fixes one known leak. Full-system sealing addresses every joint, seam, and boot in the duct run. For homes older than 15 years, we almost always recommend the full system because where there’s one failed joint, there are usually a dozen more behind it. We’ll show you the evidence either way.
Commercial-Grade Equipment on Every Job
Our crews run Rotobrush rotary brush systems, Nikro negative-air machines, and filtration products from Honeywell and Guardsman, the same platform-level tools commercial duct crews use. That equipment lets us test pressure before and after sealing so you see the measured improvement, not just our word for it. The tools are professional-grade because the standard is professional-grade.
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.
Brands We Service
We work on duct systems connected to every major HVAC brand, and we’re especially familiar with the duct configurations on Honeywell and Guardsman filtration setups because those systems tend to run tighter tolerances that expose leaks faster. Honeywell media cabinets and Guardsman filtration housings put measurable resistance on the air stream, and if your ducts aren’t sealed, that back pressure finds every weak joint and seam. Our crews know how to seal around those filter housings properly without restricting access for future filter changes.
We also run Rotobrush rotary brush systems and Nikro negative-air machines on our sealing jobs, which means we can clean and inspect the duct interior before sealing it, the right sequence. Whether your system runs Honeywell, Guardsman, or any other make, the sealing principles are the same and our written warranty covers the work either way.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Rooms that never reach the thermostat temperature. If the back bedroom runs consistently warmer than the hallway where the thermostat lives, your system is losing air somewhere in the run. That temperature gap means the thermostat shuts the system off before the far rooms are comfortable.
- Dust accumulating fast, even after cleaning. Leaks on the return side pull attic air, insulation fibers, and fine dust into the system and blow it through your house. If furniture gets a film within days of dusting, you’re breathing attic air.
- Utility bills that climb in summer and winter. Duct leakage means you pay to condition air that escapes before it reaches a room. Fort Worth homes with severe leaks see 20 to 30 percent of their HVAC bill literally disappear into the attic.
- Whistling or hissing at the registers. That sound is air forcing its way through a gap under pressure. A properly sealed system moves air quietly because the pressure stays where it belongs, inside the duct.
- Uneven airflow between rooms on the same level. If the living room blows hard and the nursery barely moves air, the trunk line is leaking between those two points. Sealing evens out the pressure so every register gets its share.
Our Process, Step by Step
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Inspection and pressure testing. We start by running a negative-air test to find exactly where the system is leaking. This takes about 45 minutes and gives us a baseline reading we’ll compare against after sealing. You’ll see the numbers, not just our opinion.
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Written quote before work begins. Based on the inspection, we write up a line-item price for the sealing work, any repair work, and any insulation replacement. That price is the price, signed before tools come off the truck, and it doesn’t move at the door.
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Repair and prep. Any crushed, disconnected, or chewed-through sections get replaced or reconnected first. Sealing over damage is a waste of your money, so we fix the structure before we seal it. Photos are taken of every repair.
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Sealing with mastic or aerosolized sealant. We brush mastic onto every accessible joint, seam, and boot, and use aerosolized sealing for tight or inaccessible sections when the system needs it. The mastic cures into a flexible seal that holds for decades.
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Post-seal verification and cleanup. We run the pressure test again and show you the before-and-after numbers. Then we leave the site clean, the way The Garrison Code requires: no debris, no mastic smears, no mystery dust from our work. You get a written warranty and a clear explanation of what we did.
How Much Does Duct Sealing Cost in Fort Worth?
our Duct Sealing in Bedford and a typical duct sealing job in Fort Worth runs $850 to $2,400 for a full system, depending on the size of the home, how many feet of ductwork run through unconditioned space, and the severity of the leakage we find during inspection. A targeted single-joint repair can run under $250. Duct insulation replacement, when needed, adds $300 to $800 depending on how much wrap has failed. A full repair-and-seal package on an older home with significant damage lands in the $1,200 to $2,400 range.
What affects the price most is accessibility. Ductwork in a wide attic with decking is faster to work on than ductwork crammed into a crawl space or buried under insulation. Severity matters too, a system with 15 leaking joints takes longer than one with three. What does not affect the price: what neighborhood you live in, what kind of car is in the driveway, or how much the tech thinks you can afford. The price is the price, written down before work starts.
To avoid overpaying, ask any company to show you the leaks before they seal them. We do that automatically, photos and baseline pressure numbers. Ask for a written quote with separate line items for repair, sealing, and insulation. And ask what happens if the seal fails. Our answer is the 365-Day Done Right Promise: we come back at no charge, including a free second visit, for a full year after the job.
Call (682) 255-2572 for a free estimate. We’ll schedule an inspection and give you a written price before any work is agreed to.
Our Service Area Near Fort Worth
We serve Fort Worth proper and the surrounding communities, including Euless, Bedford, Colleyville, Haltom City, River Oaks, Sansom Park, and as far east as Kennedale and Forest Hill. Most sealing jobs in the immediate Fort Worth areas are completed within one business day. For homeowners in neighboring cities, we also cover Duct Sealing in Mansfield and the surrounding Tarrant County area. Off to the northeast, our crews support Duct Sealing in Southlake as well. Call and we’ll confirm your address and schedule the inspection at a time that works for you.
Serving Fort Worth, TX - Our Local Coverage Area
We’re based in the Fort Worth area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Duct Sealing in Fort Worth
Duct sealing is the process of closing every joint, seam, and connection point in your air distribution system so conditioned air stops leaking into unconditioned spaces like attics and crawl spaces. We use brush-applied mastic and, where needed, aerosolized sealant to close gaps permanently. The result is air that reaches your rooms at the temperature it left the air handler.
A full duct sealing job on a typical Fort Worth home takes one business day, including inspection, repairs, sealing, and post-seal verification. Larger homes with extensive duct runs or hard-to-access attics may take a second day, which we’ll tell you during the estimate. We’ll give you a firm time window when you schedule, and our crews arrive inside it.
Full-system duct sealing in Fort Worth runs $850 to $2,400 depending on home size, duct accessibility, and severity of leakage. Targeted repairs can cost under $250, and insulation replacement adds $300 to $800 when it’s needed. You get a written line-item quote before work starts, and that price does not change at the door. Call (682) 255-2572 and we’ll give you an exact number based on a free inspection.
Yes, we regularly seal ductwork on systems running Honeywell and Guardsman filtration setups, and our crews know how to work around those filter housings without restricting access or creating new leaks. The sealing method is the same for any brand, and the written warranty covers the work regardless of what equipment you run.
If a duct has disconnected entirely or a pest has torn a hole in a run, that’s a failure we can usually address within one to two business days. Our phones are answered by a live person 24 hours a day, 7 days a week, so you can describe the problem and get scheduled without waiting through a voicemail loop.
Every duct sealing job is covered by the 365-Day Done Right Promise, written into your invoice. If the seal fails within one year, we return and make it right at no charge, including a free second visit. That’s the Garrison Standard, and it’s been the rule under Roy Castellanos since 2004.
Clear a path to the attic access or crawl space entry, move any furniture blocking registers, and make sure the HVAC system is accessible. That’s it. Our technicians bring drop cloths and equipment, handle the sealing and cleanup, and leave the site the way they found it, minus the leaks. Call (682) 255-2572 and we’ll walk you through anything else you need to know.
Schedule Your Duct Sealing Service in Fort Worth Today
Stop paying to condition your attic. Call (682) 255-2572 and we’ll schedule a free inspection, give you a written price before any work starts, and seal your ducts with a one-year written guarantee. No pressure, no bait-and-switch, just a straight answer and a price that holds. A live person answers 24/7.
Written by Roy Castellanos, Owner at Hollis Air Duct Fort Worth, serving Fort Worth since 2004.