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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Cibolo
We’re the crew Hollis Air Duct Cleaning sends to Cibolo when a homeowner’s upstairs won’t hold temperature or the electric bill keeps climbing for no clear reason. Dispatch and scheduling run through our San Antonio office, but our trucks roll into Cibolo neighborhoods regularly, from the newer builds along FM 78 to the early-2000s tracts off Green Valley Road. We know the difference matters. A house built in 2022 has different duct problems than one built in 2002, and we price and approach them differently. If your system is leaking conditioned air into the attic, we’ll find it, show you on camera, and give you a written price before we touch anything. Call (361) 326-5060.
Why Hollis Air Duct Cleaning Is Cibolo’s Preferred Duct Sealing Company
We’ve been doing this since 2004 as part of the Garrison Partners family, and that track record outlasts most of the competitors you’ll find in Cibolo today. Our technicians are background-checked and uniformed, and they arrive inside the quoted window, not whenever they feel like it. The Garrison Standard means written prices, written guarantees, and a 365-Day Done Right Promise on every job. If the seal fails within a year, we come back and make it right at no charge, including a free second visit. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
Air Duct Sealing in Cibolo
Air Duct Sealing in Cibolo is often the real fix behind symptoms homeowners blame on dirty ducts or aging equipment. When your upstairs bedroom runs ten degrees warmer than downstairs, or your utility bill spikes every July and August, the culprit is frequently air escaping through failed joints in the attic ductwork rather than a problem with the AC unit itself. We seal with mastic and proper foil tape at the plenum, trunk, and branch connections, then pressure-test to verify the fix. A typical duct sealing job in Cibolo runs $450 – $850 for a standard single-family home, depending on system size, attic accessibility, and how many joints need attention.
What We Find in Older Cibolo Systems
Cibolo’s early-2000s tract homes were often built with flexible duct runs that have now reached or passed their 15-year service life, and many contain factory-installed tape or mastic joints that have dried out and are leaking at the plenum. This means a meaningful share of Cibolo duct-sealing calls are really re-sealing aging original systems, not tuning new construction. We see this pattern far less in the 2010s – 2020s subdivisions going up along FM 78, where materials and installation practices improved.
Camera Inspection Before We Seal
We run a camera through the system first. You’ll see what we see: disconnected runs, crushed branches, or dried mastic flaking off the plenum. No guessing. No sealing over a problem that needs rerouting or replacement first. The camera footage belongs to you, and we explain what it means before we quote.
Duct Sealing Services in Cibolo
Duct Sealing Services in Cibolo cover everything from spot repairs at a single leaking joint to full-system resealing after a camera inspection finds multiple failure points. Our crew works with mastic, foil tape, and mechanical fasteners appropriate to each joint type. We don’t use duct tape, the gray cloth stuff from the hardware store, because it fails in attic heat within months. For Cibolo’s humid subtropical climate, where attics regularly exceed 130 degrees in summer, we use products rated for that environment. A partial seal on a specific problem zone typically runs $280 – $450, while a whole-system seal on a larger two-story home can reach $950 – $1,400.
Sealing After Construction Debris
New-construction subdivisions along FM 78 and Green Valley Road often have drywall dust and construction debris coating duct interiors. Sealing over that debris without a proper source-removal clean traps the dust and defeats the seal. When we find this, we recommend cleaning first, then sealing. Our Duct Sealing team coordinates both steps so you’re not scheduling two different companies.
Re-routing Crushed or Sagging Runs
Sometimes sealing isn’t enough. Flexible duct runs sagging or crushed in the attic from improper original installation or later storage need to be rerouted or replaced before any seal will hold. We flag this during inspection, show you the photo, and quote the rerouting separately from the sealing work. No bundled mystery pricing.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Cibolo
We seal and service systems using components from Honeywell, Aprilaire, and Abatement Technologies. These are the same filtration and sealing products commercial crews specify, and we stock them for Cibolo jobs so we’re not ordering parts and making you wait. Our technicians carry mastic rated for high-humidity attics, foil tape that won’t delaminate in Cibolo summer heat, and mechanical fasteners for rigid duct connections. If your system needs a new plenum seal or an upgraded return air pathway, we build it with materials that match the original manufacturer’s spec or exceed it. Fast turnaround because the truck arrives loaded.
Common Duct Sealing Problems We See in Cibolo Homes
- Dried original mastic at plenum joints. The factory-applied sealant on early-2000s Cibolo homes has hardened and cracked after two decades of attic heat cycles. Conditioned air escapes upward; hot, humid attic air gets pulled into the return. Your AC runs longer for the same result.
- Crushed flex runs from attic storage. Homeowners or later contractors set boxes, holiday decorations, or insulation batts on top of flexible duct. The restriction starves the room of airflow and creates a turbulence point where the flex tears at the collar.
- Disconnected branches at the supply trunk. Our tech was called to a two-story home off Green Valley Road where the upstairs never cooled evenly; the homeowner had just had the system cleaned by another outfit, but a camera inspection found a disconnected flex run in the attic and a crushed branch at the supply trunk, both original to the early-2000s build. We reconnected and mastic-sealed the run, sealed several other leaking joints at the air handler plenum, and the upstairs bedroom finally held temperature with the same equipment.
- Construction debris in new-build ducts. Fast-growing Cibolo subdivisions often leave drywall dust, wood chips, and fastener debris in the duct system. Sealing without cleaning first traps that material and can actually worsen indoor air quality by creating pressurized pockets where dust breaks loose later.
Pricing for Duct Sealing in Cibolo, TX
We’re direct about numbers because we’ve seen what happens when homeowners get a low phone quote that doubles once the technician is inside. A typical duct sealing job in Cibolo runs $450 – $850 for most single-family homes. Smaller spot repairs start around $280. Whole-system seals on larger two-story homes with multiple attic zones can reach $950 – $1,400. What moves the price: how many joints need attention, whether flex runs need rerouting or replacement, attic accessibility, and whether we need to clean construction debris before sealing. We give one flat price per system, agreed in writing before work starts. No per-vent pricing. No add-ons at the door. Estimates are free. Call (361) 326-5060.
We Also Serve Cities Near Cibolo
Our crews work Cibolo regularly and also handle jobs in Schertz, Universal City, Converse, and New Braunfels. Same standards, same written pricing, same 365-Day Done Right Promise in every zip code we cover.
Serving Cibolo, TX - Our Local Coverage Area
We’re based in the Cibolo 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 Cibolo
Yes, many do. The original mastic and foil tape at plenum and trunk joints has dried out after 20-plus years in hot attics, and flexible duct runs have often sagged or been crushed by later storage. We re-seal these systems regularly in Cibolo neighborhoods with that vintage housing stock. Call (361) 326-5060 for a free camera inspection and written quote.
Not if the dust is coming from inside the ducts. Sealing stops air leakage at joints; it doesn’t remove existing debris. If you’re still seeing dust after a cleaning, we need to look at whether the original cleaning missed construction debris or whether your return path is pulling unfiltered air from the attic through a failed seal. We check both. Call (361) 326-5060 and we’ll sort out which problem you actually have.
It shows disconnected flex runs, crushed branches, dried mastic flaking off metal joints, and debris accumulation at low points in the duct. You’ll see exactly what we see, and we’ll explain which findings affect airflow, which affect air quality, and what each costs to fix. The footage is yours to keep. Call (361) 326-5060 to schedule.
It does. Cibolo’s humid subtropical climate means long cooling seasons with the AC running nearly year-round. When your return duct leaks in the attic, it pulls hot, humid attic air into the system. That forces the evaporator coil to work harder and can promote mold growth in the ductwork. A proper seal keeps conditioned air inside the ducts and attic air outside. Call (361) 326-5060 for an assessment of your system’s current leakage.
Most sealing work is done from the attic access, at the air handler, and at register boots. We don’t tear into walls unless a camera inspection shows a problem inside a wall cavity, which is rare. For the typical Cibolo home, we work entirely in the attic and at the mechanical closet. You’ll know before we start if your job is typical or not. Call (361) 326-5060 for a free estimate.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Cibolo since 2004.