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 Fair Oaks Ranch
We seal ducts in Fair Oaks Ranch homes where three-zone HVAC systems, 1980s flex duct runs, and Hill Country caliche dust create problems that single-system pricing cannot fix. Our Fair Oaks Ranch crews carry mastic, foil tape, and negative-air HEPA rigs to homes from the Golf & Country Club to the newer builds off Fair Oaks Parkway. Dispatch runs from our San Antonio office, and we typically book Fair Oaks Ranch jobs within two business days. Call (361) 326-5060 for a written estimate before any work starts.
Why Hollis Air Duct Cleaning Is Fair Oaks Ranch’s Preferred Duct Sealing Company
We’ve worked in Fair Oaks Ranch long enough to know which attics hold original 1980s flex duct and which have been retrofitted. That matters because sealing deteriorated flex is different from sealing rigid metal trunk lines. Our technicians are background-checked, uniformed, and expected to arrive inside the quoted window, price in writing, and leave the site clean – The Garrison Code applies to every Fair Oaks Ranch job.
Our 365-Day Done Right Promise covers every duct sealing repair in writing: if the seal fails within a year, we return and make it right at no charge, including a free second visit. No negotiation, no runaround. The price we write down before touching your system is the price you pay. We’ve seen too many Fair Oaks Ranch homeowners burned by teaser quotes that doubled once the van was in the driveway. That doesn’t happen here.
HVAC Duct Sealing in Fair Oaks Ranch
HVAC Duct Sealing in Fair Oaks Ranch means closing the leaks, gaps, and disconnected joints that let conditioned air escape into your attic or crawl space before it reaches your rooms. Most Fair Oaks Ranch homes run multiple HVAC zones across 3,000+ square feet, so sealing must happen per-system, not as one blanket price for the whole house. A typical duct sealing job for one system in Fair Oaks Ranch runs $450 – $850, with whole-house multi-system work ranging $1,200 – $2,400 depending on access and condition.
We see the worst leaks at plenum connections, return boot seams, and where flex duct meets metal collars. In Fair Oaks Ranch’s climate – hot humid summers, mild winters – those leaks force your compressor to run longer cycles, which shows up on your CPS Energy bill and shortens equipment life.
Per-System Sealing for Multi-Zone Homes
Three systems means three separate supply and return paths. Sealing only the worst one leaves return-side leaks in Zone 2 pulling attic air through Zone 3’s shared return. We isolate each system, seal it completely, then verify static pressure at the air handler before moving to the next.
Mastic vs. Tape Applications
We use duct sealing mastic on plenum surfaces and foil-backed tape on flex-to-metal connections. Mastic stays flexible through Fair Oaks Ranch attic temperature swings better than cheap cloth tape, which dries out and peels within a season.
Duct Repair in Fair Oaks Ranch
Duct Repair in Fair Oaks Ranch addresses the crushed, disconnected, or deteriorated sections that sealing alone cannot fix. Sagging 1980s flex duct above garages near the Golf & Country Club often pools caliche dust at low points and needs physical support or replacement before any sealing work. A typical duct repair in Fair Oaks Ranch runs $280 – $650 for section replacement, with full flex duct reroutes in difficult attics reaching $800 – $1,400.
We don’t seal dirty or damaged duct. The Garrison Standard requires source removal first: agitation with rotary brushes, negative-air HEPA extraction, then inspection with a camera before mastic touches metal. Skipping this step means sealing contaminants inside and guaranteeing callback.
Crushed Flex Duct Above Garages
We regularly find flex duct crushed by storage boxes or sagging under its own weight in Fair Oaks Ranch attics. That section gets replaced with properly supported flex or converted to rigid duct where clearance allows.
Return Path Restoration
Shared return paths between zones leak at drywall seams and missing end caps. We seal those with mastic and metal patches so each zone draws only from its intended spaces, not from the garage or attic.
Trusted Brands We Service in Fair Oaks Ranch
Our Fair Oaks Ranch crews work with equipment from Nikro, Honeywell, and Aprilaire – the same negative-air machines, filtration media, and zone controls found in commercial installations. We stock common flex duct diameters, collars, and mastic compounds locally, so most Fair Oaks Ranch repairs don’t wait on parts. When your Honeywell zone board or Aprilaire media filter needs attention during a sealing job, we handle it without a second trip.
Common Duct Sealing Problems We See in Fair Oaks Ranch Homes
- Three-system homes sealed as one. A 4,200 square foot custom off Fair Oaks Parkway with separate upstairs, downstairs, and guest house systems needs three separate sealing scopes. Treating it as one job leaves cross-contamination between zones and wastes the homeowner’s money.
- Sagging 1980s flex duct above garages near the Golf & Country Club. These low points collect caliche dust and live oak pollen year-round. Sealing without lifting and supporting the sag just traps contamination and guarantees the seal fails where the duct touches insulation.
- Mastic applied to dirty plenum surfaces. Fair Oaks Ranch attics swing from humid 140°F summer days to mild winter nights. Oil and dust on a plenum prevent mastic adhesion; we HEPA-vac and prep every surface before sealing, or the bond separates within months.
- Return leaks pulling garage air into living spaces. Custom Fair Oaks Ranch homes with return chases through garage ceilings often leak at drywall seams. We seal these with mastic and metal patches so your system doesn’t circulate exhaust fumes or pesticide drift.
Pricing for Duct Sealing in Fair Oaks Ranch, TX
Single-system duct sealing in Fair Oaks Ranch typically runs $450 – $850. Two-system homes range $900 – $1,600. Three-system custom homes, common in Fair Oaks Ranch, run $1,200 – $2,400. Duct repair adds $280 – $650 per section. What moves the price: attic access difficulty, number of plenum connections, whether we need to replace crushed flex before sealing, and how many zone dampers require adjustment.
We write the price down before touching your system. One flat price per system, agreed before work starts. No per-vent counting, no add-ons at the door. You’ll also receive before-and-after photos from our camera inspection, plus static pressure readings showing the improvement. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Fair Oaks Ranch
Our Duct Sealing crews also work in Houston, San Antonio, Dallas, and Fort Worth. Each location operates independently under The Garrison Standard with the same written pricing and 365-Day Done Right Promise.
Serving Fair Oaks Ranch, TX - Our Local Coverage Area
We’re based in the Fair Oaks Ranch 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 Fair Oaks Ranch
We seal each system separately and price per system. Fair Oaks Ranch’s 3,000+ square foot custom homes with three zones need isolated sealing to prevent return-side leaks in one zone from pulling contaminated air across the whole house. A typical three-system sealing job in Fair Oaks Ranch runs $1,200 – $2,400. Call (361) 326-5060 for an exact quote – estimates are free.
Sagging flex duct usually needs physical support or replacement before sealing. In Fair Oaks Ranch homes near the Golf & Country Club, we regularly find 1980s flex crushed or pooling caliche dust at low points above garages. Sealing without lifting the sag traps contamination and the seal fails. We inspect with a camera first, then quote replacement or support separately from the sealing scope. Call (361) 326-5060 to schedule a look.
We document static pressure readings at your air handler before and after sealing, and we provide dated before-and-after photos from our camera inspection. In a recent Fair Oaks Ranch job off Fair Oaks Parkway, static pressure dropped measurably after we sealed crushed flex and streamer leaks at a return boot, and the homeowner’s third system finally cycled normally instead of running nonstop. Call (361) 326-5060 and we’ll show you exactly what we found and what changed.
Yes. Caliche dust is abrasive and oily; it prevents mastic from bonding to metal plenums and collars. We HEPA-vacuum and agitate every surface with rotary brushes before applying sealant, then verify cleanliness with a camera. In Fair Oaks Ranch’s Hill Country environment, skipping this prep step means the seal fails within one season of temperature swings. Call (361) 326-5060 for a prep-and-seal quote.
Sealing reduces pollen infiltration by closing the leaks that pull unfiltered attic air into your return paths, but it works best paired with proper filtration. We check your Honeywell or Aprilaire media filter during sealing jobs and upgrade to MERV 11+ if your system can handle it. Fair Oaks Ranch’s cedar fever season hits hard in December through February; sealed returns with tight filters cut the load significantly. Call (361) 326-5060 to discuss filtration options during your sealing estimate.
Ready to stop throwing conditioned air into your attic? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free, written estimate on duct sealing in Fair Oaks Ranch. We’ll inspect your system with a camera, quote one flat price per system before any work starts, and back every seal with our 365-Day Done Right Promise.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Fair Oaks Ranch since 2004.