Fast, Reliable Duct Repair & Sealing Across New Braunfels
Duct repair and sealing in New Braunfels typically costs $180-$650 depending on the scope, and most jobs are completed in a single visit. If your utility bills are climbing or certain rooms won’t hold temperature, the problem is often leaks or damage in the ductwork itself, not your AC unit.
We’ve been driving to New Braunfels from our Houston headquarters for years, and we know the roads well enough to give you a real arrival time, not a guess. From the older ranch homes near Gruene to the new construction in Vintage Oaks off 281, we’ve repaired duct systems in every corner of this city. Our technicians carry R-8 insulated flex duct, mastic sealant, and metal repair stock on every truck, so we’re not making a second trip because we showed up short. Call (866) 347-2063 and you’ll reach a live person who can schedule you, not a voicemail tree.
Why Bellows Air Duct & Vent Co. of Texas Is New Braunfels’s Preferred Duct Repair & Sealing Company
New Braunfels homeowners have called us back for 42 years because we do what we say we’ll do. We’re not a coupon outfit that advertises $79 duct cleaning then pitches $2,000 in “urgent” repairs at the door. Our price is the price, disclosed before we touch a tool.
We answer our phones 24 hours a day with a live person, not an app or a callback promise. Our technicians are background-checked, uniformed, and trained on the same Rotobrush and Nikro equipment that serious HVAC contractors specify. Every duct repair job in New Braunfels gets camera-inspected before and after, so you see the leak or damage we found, and you see the sealed, repaired result. Our 90-Day Done Right Promise means if something isn’t right, we return at no charge with no paperwork required. We stand behind it because we always have.
We know New Braunfels’s two personalities: the German-heritage core with original 1950s-1980s ranch homes, and the explosive post-2010 growth in ZIP 78132. That split housing stock means we see two completely different duct problems, and we come prepared for both.
Our Duct Repair & Sealing Services in New Braunfels
Duct Sealing with Mastic Sealant
New Braunfels’s river-corridor humidity makes duct sealing a priority, not a luxury. We apply professional-grade mastic sealant to every joint and connection, creating a permanent bond that foil tape can’t match. In master-planned communities like Vintage Oaks and Havenwood, we regularly find builder-installed ducts with no mastic at all, just friction fits that leak conditioned air into the attic from day one. Our Duct Repair & Sealing team seals every seam so your cooled air reaches the rooms you actually live in.
Flex Duct Repair
Flex duct is the standard in New Braunfels new construction, but standard doesn’t mean well-installed. We recently serviced a 2021-built home in Vintage Oaks where the builder had used uninsulated flex duct in the attic that was kinked at every joist. The homeowner complained of warm spots in the bonus room. We replaced three sections with R-8 insulated flex duct and sealed all joints with mastic, restoring balanced airflow and eliminating the temperature differential. Most flex duct repairs in New Braunfels run $220-$480.
Metal Duct Repair
The older ranch homes near downtown and Gruene often have galvanized steel ductwork from the 1960s-1980s. These systems can last decades, but seams separate, rust spots develop, and connections to flex branches fail. We repair metal duct with proper sheet-metal patches, sealant, and mechanical fasteners, not duct tape. For homes in ZIP 78130 with original metal systems, repair typically runs $280-$550 depending on accessibility and extent of damage.
Duct Insulation Replacement
In New Braunfels’s humid climate, attic duct insulation doesn’t just save energy, it prevents condensation. We’ve found bare metal ducts sweating moisture in river-adjacent neighborhoods like Old Town and the Comal riverside streets off Loop 337, where humidity stays elevated year-round. We install R-8 insulation on flex and metal alike, properly sealed and supported so it doesn’t shift or sag. Insulation work in New Braunfels typically ranges $340-$650 for partial replacement, $680-$1,200 for full system re-insulation.
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.
Trusted Brands We Service in New Braunfels
We stock parts and materials from Rotobrush, Nikro, Honeywell, and Aprilaire, the same brands that professional HVAC contractors specify for their own jobs. For New Braunfels homeowners, that means no waiting on a parts run to San Antonio. Our trucks carry R-8 flex duct in multiple diameters, mastic sealant, insulation wraps, and metal repair stock. If your system uses Honeywell zone dampers or Aprilaire media filters, we service those too. Most repairs are completed in one visit because we showed up with what we needed.
Common Duct Repair & Sealing Problems We See in New Braunfels Homes
- Builder-grade flex duct with compression or pinch points. In new subdivisions like Havenwood and Texas Crossing, flex duct is often jammed through tight stud bays with sharp bends that restrict airflow. Homeowners notice it first as a room that never cools properly, sometimes within the first summer.
- Unsealed duct joints leaking into the attic. During that first summer in a new New Braunfels home, poorly sealed connections between trunk lines and branch ducts leak conditioned air into the attic. The AC runs longer, the bill climbs, and rooms stay uneven. Mastic sealing fixes it permanently.
- Insulation shifted or detached after the builder warranty expires. Two years after move-in, homeowners in ZIP 78132 call us because bare metal ducts in the attic are sweating during humid months. The builder’s insulation tape failed, or the supports were inadequate for Texas heat cycling.
- Moisture and mold in river-corridor vacation rentals. Properties along the Comal and Guadalupe that rent all summer then sit closed all winter trap humidity in the ductwork. Every spring, before Schlitterbahn opens, these systems need inspection and repair in a way that full-time residences simply don’t.
Pricing for Duct Repair & Sealing in New Braunfels, TX
We’re upfront about numbers because nobody likes a surprise on the invoice.
| Service | Typical Range in New Braunfels |
|---|---|
| Mastic duct sealing (partial system) | $180-$340 |
| Mastic duct sealing (full system) | $380-$620 |
| Flex duct repair / section replacement | $220-$480 |
| Metal duct repair (seams, patches, connections) | $280-$550 |
| Duct insulation replacement (partial) | $340-$650 |
| Duct insulation replacement (full system) | $680-$1,200 |
What moves the price: accessibility (crawl space vs. walk-in attic), extent of damage, and whether we need to replace multiple sections or just seal. Every estimate is free, and we disclose the full price before we start. We also honor our standing $50 Off Any Repair Over $250, and we offer a Free Second Opinion on Any Written Estimate if you’ve already been quoted elsewhere. Seniors and veterans receive a permanent 5% discount.
We Also Serve Cities Near New Braunfels
Our technicians regularly work in Cibolo, Schertz, Selma, and Seguin, often routing multiple jobs in a single day to minimize drive time and keep appointments punctual. If you’re in one of these communities, the same pricing, same 90-Day Done Right Promise, and same live-answer phone line apply. Duct Repair & Sealing in New Braunfels is our anchor point for the region, and we schedule outward from there.
Serving New Braunfels, TX - Our Local Coverage Area
We’re based in the New Braunfels 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 - Duct Repair & Sealing in New Braunfels
Builder-grade flex duct in communities like Vintage Oaks is often installed with sharp bends, compression points, and no mastic sealing. These defects don’t always show up immediately, but after a few summers of hard AC use in New Braunfels heat, restricted airflow and attic leaks become obvious as warm rooms and high bills. Call (866) 347-2063 for a free camera inspection and we’ll show you exactly what’s happening in your ducts.
Yes. New Braunfels’s caliche soil generates fine limestone dust that gets drawn into return-air intakes during dry spring months, and that dust accumulates at duct joints and seams. Our mastic sealant creates a smooth, bonded surface that doesn’t degrade under particulate load the way tape does, and our camera inspection verifies the seal is complete. For homes near active construction in growing ZIP 78132 areas, we also check for drywall dust and insulation fibers sealed into new duct systems.
Yes. The German-heritage core near Gruene and downtown has many ranch homes with original fiberglass duct board or early flex duct. We repair duct board with proper patching materials and sealant, or we can replace deteriorated sections with modern R-8 flex duct if the original is too degraded. We’ve worked on homes within walking distance of Gruene Hall that still had 1970s-era ductwork, and we know how to access tight crawl spaces common to that era’s construction.
Yes. We service rental properties in Old Town, Gruene, and along the Comal riverside streets off Loop 337. These homes have a unique failure mode: AC runs hard all summer with renters coming and going, then the property sits closed all winter with humidity trapped in the ducts. Every spring, before tubing season and Schlitterbahn open, these properties need inspection and repair. We schedule around rental turnover and provide documentation for property managers. Call (866) 347-2063 to coordinate timing.
Yes. Every duct repair job carries our 90-Day Done Right Promise: if the repair fails or the problem returns, we come back at no charge with no paperwork required. For flex duct replacement specifically, the materials are covered by manufacturer warranty, and our workmanship is covered by our promise. We don’t make you fill out forms or argue with a call center. If it’s not right, we make it right. That’s been our policy since 1984.
Ready to stop losing cooled air to your attic? Call (866) 347-2063 for a free estimate on duct repair and sealing in New Braunfels. We’ll give you an honest price before we start, show you camera footage of what we find, and stand behind the work for 90 days in writing. Same-day appointments are often available, and we answer the phone 24 hours a day.
Written by Wade Kellerman, Owner at Bellows Air Duct & Vent Co. of Texas, serving New Braunfels since 1984.