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 Farmers Branch
Duct sealing in Farmers Branch typically runs $450 – $1,200 for a whole-house system, and most jobs are completed in a single visit with the price written down before we start. We’re the Duct Sealing team at Hollis Air Duct Cleaning, and we serve Farmers Branch from our Dallas-Fort Worth dispatch office. Our crews know the difference between a 1959 ranch near Josey Lane and a 1974 brick tract home off Valley View Lane, because we’ve sealed ducts in both. Call (361) 326-5060 for a free estimate.
Farmers Branch is a fully built-out inner-ring suburb. There is no new construction ductwork to speak of. Every system we touch is a retrofit, and that changes how we price it, how long it takes, and what we find.
Why Hollis Air Duct Cleaning Is Farmers Branch’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Farmers Branch reputation is built on showing up inside the window and leaving the site clean. Homeowners here are not looking for the lowest teaser price; they’re looking for the bid they can trust. Our 365-Day Done Right Promise covers every sealing job in writing: if the work fails within a year, we return and make it right at no charge, including a free second visit.
Our technicians are background-checked and uniformed. You know who is walking into your home before they arrive. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
We price in writing before any work starts. The number does not move at the door. That matters in Farmers Branch, where many homes have decades of accumulated debris, rodent intrusion, and piecemeal HVAC modifications that only reveal themselves once we’re in the attic.
Duct Repair in Farmers Branch
Duct Repair in Farmers Branch is almost always a retrofit job on original unlined sheet-metal trunk-and-branch systems, often with flex-duct additions from various remodels. We repair crushed runs, reconnect disconnected branches, and patch rodent-chewed holes in metal ducts hidden behind original plaster or paneling. A typical repair here runs $280 – $650 depending on accessibility and material condition. Most Farmers Branch homeowners call us after noticing uneven cooling, musty odors, or a sudden spike in their summer electric bill.
Crushed Flex-Duct Restoration
Flex-duct additions from past remodels collapse further under Farmers Branch attic heat that routinely exceeds 140°F. We replace the damaged flex, seal the connection to the metal trunk with mastic, and support the run properly so it doesn’t crush again. Half the fix is the material; the other half is how it’s hung.
Sheet-Metal Patching Behind Plaster
Original unlined sheet-metal runs in 1950s – 70s Farmers Branch homes often develop gaps at joints or rodent breaches. We access the duct through minimal openings, patch with galvanized sheet and mastic, and seal the access point. The goal is stopping air loss into wall cavities, not just covering the hole.
Air Duct Sealing in Farmers Branch
Air Duct Sealing in Farmers Branch addresses the invisible energy drain that duct cleaning alone cannot fix: conditioned air escaping through unsealed joints, plenum connections, and gaps between original metal and remodel-era flex. A whole-house sealing job here typically costs $450 – $1,200, with larger or harder-to-access systems at the upper end. We use mastic and foil tape rated for high-temperature attics, applied after source removal of debris under negative pressure with HEPA filtration.
Plenum-to-Trunk Sealing
On a 1968 brick ranch off Valley View Lane on the city’s east side, our tech camera-inspected the attic trunk and found the main plenum connection had never been sealed. Superheated 140°F-plus attic air was being pulled straight into the supply side. We source-removed debris under negative pressure with HEPA filtration, then sealed the plenum and reconnected a crushed branch run with mastic and foil tape, and the homeowner’s first-week-of-June cooling complaint cleared up.
Return-Air System Sealing
Farmers Branch’s oak, cedar, and ragweed pollen surges pull fine particulates through any unsealed return joint. We seal return plenums, filter racks, and duct connections so the filtration you paid for actually filters what enters your system. Dirty seals fail visually fast even when the mastic holds, so we check our work with a smoke pencil before we close the attic.
Trusted Brands We Service in Farmers Branch
We carry professional-grade equipment and materials from Nikro, Honeywell, Aprilaire, and Abatement Technologies. Our Nikro negative-air machines and HEPA filtration systems are the same tools commercial crews use, and we stock mastic, foil tape, and flex-duct fittings sized for the original metal trunks common in Farmers Branch homes. That means no waiting on parts for a standard sealing job. Most repairs and sealings are completed same visit, with the system tested before we leave.
Common Duct Sealing Problems We See in Farmers Branch Homes
- Unsealed plenum-to-trunk connections on original 1960s – 70s east-side homes. These let 140°F-plus attic air mix into supply ducts, an invisible energy drain that only shows up during the first hot week of June when the system can’t keep up.
- Crushed or disconnected flex-duct runs from past remodels. Attic heat degrades the material further, so sealing the metal trunk without fixing the flex is a half-fix that wastes the homeowner’s money.
- Rodent-chewed holes in unlined sheet-metal runs behind original plaster or paneling. These leak air into wall cavities, defeating the seal until the breach is patched with mastic and the entry point is found.
- Pollen-loaded returns pulling fine particulates through unsealed joints. Farmers Branch’s spring and fall oak, cedar, and ragweed surges keep feeding debris through any gap, so dirty seals fail visually fast even when the mastic itself holds.
Pricing for Duct Sealing in Farmers Branch, TX
A typical duct sealing job in Farmers Branch runs $450 – $1,200 for a whole-house system. Single-area repairs or partial sealings start around $280. What moves the price: how much of the system is accessible, whether we’re working around original plaster or paneling, how many flex-duct additions need reconnection, and whether rodent damage requires patching before sealing.
We do not quote per-vent prices. We price per system, agreed in writing before work starts. That is The Garrison Standard. No estimate balloons once the technician is inside. Every job receives a written price and is covered by our 365-Day Done Right Promise. Call (361) 326-5060 for an exact quote; estimates are free.
We Also Serve Cities Near Farmers Branch
Our Dallas-Fort Worth dispatch office coordinates crews across the metro, including Duct Sealing in Farmers Branch and surrounding areas. We also serve Houston, San Antonio, Dallas, and Fort Worth with the same written pricing, background-checked technicians, and 365-Day Done Right Promise.
Serving Farmers Branch, TX - Our Local Coverage Area
We’re based in the Farmers Branch 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 Farmers Branch
Duct cleaning removes debris; duct sealing stops conditioned air from escaping. In Farmers Branch’s 1950s – 80s housing stock, original unlined sheet-metal systems have decades of unsealed joints, unsealed plenums, and flex-duct additions that leak air into attics and wall cavities. Cleaning helps air quality; sealing fixes the energy waste and uneven cooling. Call (361) 326-5060 and we’ll inspect both.
Yes. We use camera inspection tools that feed through existing registers or minimal access points to view original trunk-and-branch runs without tearing out plaster. In Farmers Branch’s fully built-out ranch stock, this is standard practice. We locate the gaps, then seal what we can reach and patch what we must access. Call (361) 326-5060 to schedule an inspection.
An unsealed plenum in a Farmers Branch attic can add 20 – 40% to summer cooling costs by pulling 140°F air directly into the supply side. The fix typically runs $280 – $450 for plenum sealing alone, or is included in a whole-house sealing at $450 – $1,200. Most homeowners notice the difference on their next bill. Call (361) 326-5060 for an exact quote.
Yes. Farmers Branch attic temperatures routinely exceed 140°F from May through September, which degrades flex-duct insulation and causes the inner liner to sag or collapse. We replace damaged flex with properly supported, sealed runs rated for high-heat attics. Sealing the metal trunk without addressing the flex is a half-fix. Call (361) 326-5060 for an inspection.
We locate entry points, patch rodent-chewed holes in sheet metal with galvanized patch and mastic, and seal all joints to prevent re-entry. In Farmers Branch’s older homes, rodents often access unlined metal runs through gaps at the plenum or wall penetrations. We clean the debris, patch the breach, and seal the system. Call (361) 326-5060 for an inspection and written quote.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Farmers Branch since 2004.