Duct Repair & Sealing in New Braunfels - Tested First, Written Price Second

Fast, Reliable Duct Repair & Sealing Across New Braunfels

Whole-system duct repair and sealing in New Braunfels typically runs $450-$1,850 depending on whether we’re resealing joints, replacing crushed flex runs, or bridging metal ductwork in tight attic spaces. Most jobs take one day, and every one starts with a written price before a panel comes off. Call (830) 402-5110 for a free estimate.

Call (830) 402-5110

We dispatch crews to New Braunfels from our San Antonio office daily. That means we’re familiar with the split personality of this market: the historic German-settled core with pre-1960 homes and retrofitted flex duct squeezed into tight attics, and the explosive ring of post-2000 subdivisions like Veramendi, Creekside, and the Vintage Oaks corridor off FM 1863 where slab-on-grade construction with long attic runs is standard. Our Duct Repair & Sealing team has worked both. We know the difference between a collapsed flex run behind a plaster wall in the old downtown grid and a supply plenum shedding caliche dust in a three-year-old build on the northwest edge.

Why CleanRun Air Duct Cleaning Schertz Is New Braunfels’s Preferred Duct Repair & Sealing Company

We’ve been serving the corridor between San Antonio and New Braunfels since 2013. In that time we’ve documented the inside of 52,000+ homes, every one with a written price agreed before work started and a photo record delivered after. That documentation matters especially in New Braunfels, where the housing stock is sharply divided and the problems look completely different on each side of the divide.

Our crews are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The 365-Day Done Right Promise applies to every job in New Braunfels, backed in writing, not subject to manager approval. If it’s not right, we make it right.

We also offer a Free Second Opinion on any written estimate. Bring a competitor’s quote; we’ll put our number next to it in writing. No call-for-pricing games. Haven Standard Clause 1.

Our Duct Repair & Sealing Services in New Braunfels

Duct Sealing

Leaky duct joints bleed conditioned air into attics and crawl spaces year-round. In New Braunfels, the problem is compounded by caliche limestone dust that infiltrates open seams and prevents mastic from bonding properly - a pattern we see constantly in newer subdivisions off FM 306 and FM 1863. We seal with mastic and reinforced mesh at every joint, then pressure-test to verify. The written scope specifies every sealed location; the photo record shows before and after.

Flex Duct Repair

Flex duct crushes, kinks, and disconnects. In the pre-1960 German core around downtown New Braunfels, decades of attic heat and rodent traffic have flattened original flex runs to near-zero airflow. In newer homes, installers sometimes bridge long spans with unsupported flex that sags between trusses. We cut out damaged sections, re-bridge with properly supported new flex, and seal with mastic. Every splice is photographed.

Metal Duct Repair

Galvanized steel ductwork cracks at seams and corrodes where humidity collects. Homes within a mile of the Guadalupe or Comal Rivers see accelerated corrosion from localized humidity pockets that persist even when the broader region dries out. We patch, replace sections, or re-fabricate transitions as needed, then seal and insulate to prevent recurrence.

Mastic Sealant Application

Mastic is the only sealant we trust for permanent duct sealing - tape fails, aerosol sealants degrade. But mastic only works on clean surfaces. In New Braunfels, that’s a specific challenge: caliche dust from construction and unpaved roads coats duct exteriors and interiors, especially in rural properties on the northwest edge. We clean before we seal. The photo record proves it.

Duct Insulation

Condensation on cold duct surfaces breeds mold in humid microclimates. River-corridor homes in New Braunfels are particularly vulnerable. We replace degraded insulation with vapor-barrier-wrapped material sized to the duct diameter, sealed at every seam.

Before

After

Trusted Brands We Service in New Braunfels

Our equipment roster includes Nikro negative-pressure extractors, Honeywell media filters, and Aprilaire humidity controls - brands customers can look up independently. We don’t make performance claims beyond manufacturer specifications. For New Braunfels homes dealing with cedar pollen loading and caliche dust, the right equipment matters: Nikro HEPA filtration captures the ultra-fine particles that standard equipment recirculates, and Aprilaire dehumidification addresses the river-corridor moisture that degrades duct jackets from the outside in. Parts for common repairs are stocked locally, so we’re not waiting on shipping to finish a job.

Common Duct Repair & Sealing Problems We See in New Braunfels Homes

• Crushed flex duct in historic core attics. Pre-1960 homes around the original German settlement often have flex duct retrofitted into tight, unconditioned attics. Decades of heat cycling and rodent traffic flatten runs against rafters or trusses. The customer reports weak airflow to specific rooms; our camera shows a duct flattened to a ribbon.
• Caliche dust caking supply plenums in new subdivisions. Mass grading of Hill Country caliche soil during construction leaves chalky dust that infiltrates HVAC systems before they’re sealed. Technicians working off FM 306 and FM 1863 routinely pull this material caked inside plenums. Mastic applied over dust fails within a season; the leak reopens.
• Mold on flex duct jackets near river corridors. The Guadalupe and Comal Rivers create humidity pockets that don’t match regional averages. Summer humidity within a mile of either river rarely drops, even when outdoor air does. Flex duct insulation absorbs this moisture; mold follows. The musty smell at registers masks the actual duct leak underneath.
• Disconnected metal joints from thermal expansion. Long attic duct runs in slab-on-grade homes - the norm in Veramendi, Creekside, and similar subdivisions - expand and contract across wide temperature swings. Seams separate; conditioned air dumps into the attic. The homeowner sees high bills and uneven temperatures.

Pricing for Duct Repair & Sealing in New Braunfels, TX

The Realistic Service Interval for Rural New Braunfels Properties

Here’s something no generic duct page can tell you: if you’re on a rural property west or northwest of New Braunfels, on unpaved roads or open caliche land, your ducts need attention every 3-5 years - not the 7-10 year interval that applies to filtered suburban homes. Two reasons specific to this area.

First, the Ashe juniper (mountain cedar) pollen release from December through February is among the heaviest in Texas. That pollen is ultra-fine; it slips past standard filters and packs into duct seams far faster than ordinary seasonal dust. Second, unpaved ranch roads and open caliche land add year-round particulate loading that suburban filters never see. Wood heat - common in acreage properties - adds soot and ash particulate that acidic residues can degrade flex duct jackets over time.

Out in the Vintage Oaks corridor off FM 1863, a customer on a wooded acre-plus lot called us because the house smelled like a campfire every time the heat kicked on. We ran a camera inspection from the air handler, found a collapsed run of flex duct crushed against an attic truss and two pulled-apart metal joints on the supply and return ducts, cut out and re-bridged both with new flex and mastic sealant, then sealed the plenum that was shedding caliche dust into the airflow. After a negative pressure source removal pass with HEPA filtration, the wood-smoke odor was gone at the registers.

Longer service drives to rural properties mean we schedule these jobs with full crew and equipment loads to minimize return trips. The written price accounts for drive time upfront; no surprise mileage charges.

We Also Serve Cities Near New Braunfels

Our crews work the full corridor: New Braunfels, Seguin to the east, Cibolo and Schertz to the south, and Canyon Lake to the north. Same written-price standard, same documented photo record, same 365-Day Done Right Promise. Scheduling is coordinated from our San Antonio office; crews are dispatched daily to each market.

FAQs - Duct Repair & Sealing in New Braunfels