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 Ennis
Duct sealing in Ennis typically runs $450 – $1,200 for a whole-home seal, depending on whether we’re working with original sheet-metal trunk lines in a downtown bungalow or flexible duct runs in a newer subdivision. Most Ennis homeowners see the job completed in a single day, with written pricing agreed before any mastic touches a joint. Call us at (361) 326-5060 for a free estimate.
We serve Ennis from our Dallas-Fort Worth dispatch office, and our crews know the local housing stock cold: the early-1900s bungalows near W. Ennis Ave with their original galvanized ductwork, the 1970s ranch homes off Highway 287 with retrofit flex that sags in August heat, and the newer builds on the north side where agricultural dust from the Blackland Prairie works its way into seams you didn’t know were there. Ennis isn’t a generic suburb, and duct sealing here shouldn’t be treated like one.
Why Hollis Air Duct Cleaning Is Ennis’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our Duct Sealing in Ennis work follows The Garrison Standard: arrive inside the quoted window, price in writing before touching anything, finish by the book, leave the site clean. That standard matters more in a town like Ennis, where word travels fast and repeat business is earned house by house.
Our technicians are background-checked and uniformed. You know who’s walking in before they knock. Phones are answered by a live person 24 hours a day, 7 days a week – no voicemail loops, no callback queues. Every duct sealing job carries our 365-Day Done Right Promise in writing: if the seal fails or the leak returns within a year, we come back and make it right at no charge, including a free second visit.
We’ve learned Ennis’s seasonal rhythms. After the first cold front in October, calls spike because homeowners switch from AC to heat and dislodge dust that’s settled in ducts all summer, sending visible clouds out of vents. That’s the Blackland Prairie shoulder-season switch-over, and it shows up in older homes with loose longitudinal seams that stayed hidden through the cooling months.
HVAC Duct Sealing in Ennis
HVAC Duct Sealing in Ennis means closing the leak paths that let conditioned air escape into your attic, crawl space, or wall cavities – and letting unconditioned, dusty air get sucked back in. We use duct sealing mastic reinforced with fiberglass mesh on metal joints, and specialized sealants rated for flexible duct connections. The goal is simple: the air you paid to heat or cool actually reaches the rooms where you live.
Most Ennis homeowners need duct sealing when they notice uneven temperatures room to room, utility bills climbing without explanation, or dust blowing from registers even after cleaning. In Ennis specifically, the humid subtropical climate means systems run nearly year-round, and that constant cycling wears on joints faster than in milder zones. High humidity also promotes mold and mildew growth inside ductwork when cool air meets warm, moist attic air through a gap.
A typical whole-home HVAC duct sealing in Ennis runs $450 – $1,200. Smaller jobs – sealing a single trunk line or addressing specific problem registers – can start around $250. We price by the system, not by the vent, and we write it down before we start.
Sheet-Metal Sealing in Older Homes
Original galvanized ductwork in Ennis bungalows often has loose longitudinal seams and failed takeoff boots. We seal these with mastic and mesh, then test static pressure at the air handler to verify the fix. These jobs take longer because access is tight and the metal may need support reinforcement before sealing holds.
Flex Duct Repair and Seal
Retrofit flex duct in 1970s – 80s Ennis ranch homes sags in attics that hit 140 degrees in July. We re-strap and support the run before applying sealant, because sealing a duct that will re-sag next season is wasted work. Our crews carry strapping and support brackets on every truck.
Duct Repair in Ennis
Duct Repair in Ennis covers the physical fixes that sealing alone won’t solve: crushed or disconnected flex runs, corroded sheet-metal sections, failed dampers, and boots that have pulled away from the trunk line. We inspect with camera systems, quote the repair in writing, and complete the work same visit when parts allow.
Ennis’s housing split creates two common repair profiles. Downtown bungalows need seam sealing, boot reattachment, and sometimes section replacement where original metal has corroded through. Ranch homes and newer construction more often need flex duct replacement where rodents, heat damage, or sagging have created collapses or tears. Both get the same written price guarantee and 365-day coverage.
Duct repair in Ennis typically ranges from $300 for a single boot replacement or section patch to $1,800 for extensive trunk line rebuilding in a larger home. We stock common fittings and flex diameters on our trucks, and our Dallas-Fort Worth office keeps ties with local suppliers for same-day parts on less common sizes.
Attic Access and Support Work
Many Ennis attics have blown insulation that complicates duct access. We move insulation, complete the repair, and replace it without charging extra for the handling. If your duct needs structural support before repair, we install it. The seal or splice won’t hold if the duct hangs free.
Post-Repair Flow Verification
After any duct repair, we measure airflow at each register and compare to pre-repair readings. You see the numbers. In Ennis, where summer cooling loads are heavy, a 15% airflow improvement at a distant bedroom register can mean the difference between sleeping comfortably and running a window unit.
Trusted Brands We Service in Ennis
Our Duct Sealing crews run professional-grade equipment, not hardware-store gear. We carry Rotobrush rotary brush systems for mechanical cleaning before sealant application, Nikro negative-air machines for containment during repair work, and filtration products from Honeywell, Aprilaire, and Guardsman. For sealing, we use mastic and mesh rated for commercial applications, applied with tools that let us work in tight Ennis bungalow crawl spaces and hot ranch-home attics alike. Parts and materials are stocked for Ennis-area homes, so we’re not waiting on a Dallas delivery to finish your job.
Common Duct Sealing Problems We See in Ennis Homes
- Seasonal agricultural dust infiltration. Ennis sits in the Blackland Prairie surrounded by cotton and corn fields. After ginning and harvest, fine agricultural dust gets pulled into return ducts and behaves differently than household dust – it dries out and shrinks fiberglass flex duct liner, opening leak paths at the seams precisely where sealed joints matter most.
- Original sheet-metal with loose longitudinal seams. Early-1900s bungalows near downtown Ennis often have galvanized trunk lines where the longitudinal lockseams have worked loose over decades of thermal expansion. These leaks don’t always show on a static pressure test until the system switches from cooling to heating and the metal expands differently.
- Sagging retrofit flex duct in ranch homes. 1970s – 80s Ennis ranches often have flex duct that was strapped too loosely or with inadequate support spacing. The sag creates a low point where condensation collects and where the duct wall fatigues, opening leaks that sealing alone won’t fix without re-supporting the run first.
- Shared-stack dryer vent complications in older rentals. Two-story rentals near downtown Ennis sometimes share a common dryer vent chase. Lint collects in that shared pathway, and sealing the duct without clearing the lint load first traps combustible material behind a tighter seam. Per NFPA standards, the lint you can reach at the trap is a fraction of what’s in the run.
Pricing for Duct Sealing in Ennis, TX
Whole-home duct sealing in Ennis runs $450 – $1,200. Single-area or partial-system sealing starts around $250. Duct repair, when sections need replacement or rebuilding, ranges from $300 to $1,800 depending on material, access difficulty, and whether we’re working in a tight downtown bungalow crawl space or a more accessible ranch-home attic.
What moves the price: accessibility (crawl space versus attic versus basement), duct material (sheet metal takes longer to seal properly than flex), the extent of support work needed before sealant will hold, and whether we’re addressing a single known leak or hunting multiple paths with pressure testing. We do not quote per-vent pricing. We price by the system, write it down before work starts, and it does not move at the door.
Every estimate is free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Ennis
Our crews work throughout Ellis County and southern Dallas County, including Palmer, Waxahachie, Red Oak, and Wilmer. Each job follows The Garrison Standard: written price, written guarantee, background-checked uniformed technicians, and the 365-Day Done Right Promise.
Serving Ennis, TX - Our Local Coverage Area
We’re based in the Ennis 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 Ennis
Older bungalows near W. Ennis Ave and downtown have original sheet-metal ductwork with tight crawl-space access, loose longitudinal seams that need hand-sealing with mastic and mesh, and often require structural support work before sealant will hold. Newer subdivisions typically have flexible duct in open attics with simpler access and fewer corroded joints. The labor difference can add 30 – 50% to the job time. Call (361) 326-5060 and we’ll quote your specific home for free.
Yes, if your ducts leak. Cleaning removes debris; sealing closes the pathways that let debris and unconditioned air back in. In Ennis, the Blackland Prairie agricultural dust load means leaks refill quickly with fine particles that bypass standard filters. We often find that homes with recent cleaning but persistent dust problems have return-side leaks pulling attic air through gaps the cleaning couldn’t address. Call (361) 326-5060 and we can pressure-test to separate a leak problem from a cleanliness problem.
Partially, but with a critical safety step first. Shared-stack dryer vents in older Ennis rentals need the common chase cleaned of lint accumulation before any sealing work, per NFPA guidelines. Sealing a tighter seam without clearing that fire load traps combustible material. We clean the accessible run, seal the duct connections with rated materials, and document what we can and cannot reach in a shared system. Call (361) 326-5060 to discuss your specific building layout.
Signs of duct leaks include uneven room temperatures, utility bills that climb without rate increases, dust blowing from registers right after cleaning, and visible gaps or disconnected boots in accessible areas. The definitive test is a static pressure measurement and smoke pencil or blower-door-assisted leak detection, which we perform during our free estimate. In Ennis, the October shoulder-season switch-over often reveals leaks that stayed hidden through summer cooling. Call (361) 326-5060 and we’ll test it.
Most Ennis homes benefit from MERV 11 – 13 filtration during the spring and fall agricultural seasons, but only if the duct system is well-sealed. A high-MERV filter on a leaky return duct just increases the suction pulling unfiltered attic air through gaps. We typically recommend sealing first, then upgrading filtration, to avoid overloading the blower motor with restriction it wasn’t designed for. Call (361) 326-5060 and we’ll assess your system’s capacity alongside the leak status.
Ready to stop losing conditioned air to your attic and crawl space? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free written estimate on duct sealing in Ennis. We’ll pressure-test your system, show you where the leaks are, and quote a flat system price before any work begins – backed by our 365-Day Done Right Promise in writing.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Ennis and the Dallas-Fort Worth area since 2004.