Fast, Reliable Duct Repair & Sealing Across Friendswood
Duct repair and sealing in Friendswood, TX typically costs $180-$650 depending on the scope, and most jobs are completed in a single visit. If your home sits in 77546 or 77549 and your energy bills have climbed without explanation, or certain rooms never cool evenly, the problem is often in the ductwork, not the AC unit itself. Call (866) 347-2063 for a free estimate with upfront pricing.
We’ve worked in Friendswood since 1984, long before the master-planned subdivisions off FM 518 filled in and back when the original ranch homes near Friendswood High School were still considered new construction. Our technicians know the difference between a 1978 brick ranch with fiberglass-lined metal ducts and a 2005 build in Winding Creek with builder-grade flex duct that was never meant to handle what this climate and this flood history throw at it. We’re usually on-site in Friendswood within a few hours of your call, and every job starts with a camera inspection so you see what we see before any work begins.
Why Bellows Air Duct & Vent Co. of Texas Is Friendswood’s Preferred Duct Repair & Sealing Company
Our reputation in Friendswood was built one house at a time, starting with the original neighborhoods near West Bay Area Boulevard and spreading into the newer developments toward 77549. Homeowners here talk to each other at Clear Creek High School games and in the H-E-B parking lot on FM 518. Word gets around when a company shows up late, changes the price, or has to come back twice. We’ve stayed busy for over 42 years because that doesn’t happen with us.
We answer our own phones, 24 hours a day. A live person, not an app or a call center in another state. When a Friendswood caller describes musty air coming from the vents after a heavy rain, we know to ask about flood history before we even pull up to the curb. That local context saves time and money.
Our Duct Repair & Sealing team carries a 90-Day Done Right Promise on every job. If it’s not right, we make it right. No paperwork to file, no argument. That’s been our policy since Wade Kellerman founded the company in 1984, and it hasn’t changed.
Every technician is background-checked and uniformed. Pricing is disclosed before a single tool is lifted. The number you hear on the phone is the number on the invoice.
Our Duct Repair & Sealing Services in Friendswood
Duct Sealing
Leaky ducts waste 20-30% of conditioned air in a typical Friendswood home, and that’s before accounting for the extra load our humidity puts on the system. We seal joints, plenums, and connections with professional-grade mastic sealant, not the foil tape that dries and fails within a few seasons. For older homes near Friendswood High School with original 1970s-1980s metal ductwork, mastic sealing restores integrity without a full replacement. For newer homes in Pine Brook Creek where builder-grade installation left gaps at the plenum, sealing stops attic air from being drawn directly into your living space. A typical duct sealing job in Friendswood runs $280-$480 for a single system.
Flex Duct Repair
Flex duct is common in Friendswood’s 1990s-2000s builds, and it’s where we find the most flood-related damage. In the Winding Creek subdivision off FM 518, we found a 2000s-built home where the builder-grade flex duct had delaminated after Harvey, and the original mastic seals had failed. Our crew used Abatement Technologies vacuums and Rotobrush tools to remove black mold from the supply plenum, then re-sealed all joints with high-grade mastic and insulated the exposed sections with R-8 wrap. Flex duct repair in Friendswood typically ranges from $180-$340 per run, depending on accessibility and whether the inner liner has torn.
Metal Duct Repair
The older core of 77546 contains well-established brick ranch and two-story homes built during Friendswood’s original residential expansion, many retaining early-era fiberglass-lined metal ducts. These systems absorb moisture from repeated flood events and harbor mold even after superficial cleaning. We repair separated seams, replace rusted sections, and reline where the fiberglass has degraded. Metal duct repair in Friendswood generally costs $320-$650, with full section replacement at the higher end.
Duct Insulation
Positioned roughly midway between downtown Houston and Galveston Bay, Friendswood sits in one of the highest-humidity corridors in the greater metro, with summer dew points routinely exceeding 75°F. This forces AC systems to run long, continuous cycles that cause supply duct sweating and condensation inside plenums, accelerating mold colonization in any duct that suffered even minor flood exposure or insulation delamination. We install R-8 insulation wrap on exposed ductwork and replace water-damaged insulation in attics where air handlers sit. Duct insulation work in Friendswood typically runs $240-$520 depending on linear footage and attic accessibility.
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 Friendswood
We stock parts and specify equipment from Rotobrush, Honeywell, and Aprilaire, the same brands serious HVAC contractors use when they’re installing systems meant to last in this climate. For Friendswood homes dealing with post-flood microbial contamination, we rely on Abatement Technologies HEPA vacuums and Nikro equipment to remove contamination rather than just move it around. Having the right tools on the truck means most repairs are completed in a single visit, whether we’re working in a 1970s ranch near Clear Creek or a newer build toward 77549.
Common Duct Repair & Sealing Problems We See in Friendswood Homes
- Builder-grade flex duct separation in master-planned communities. Homes in Winding Creek and Pine Brook Creek often have flex duct that pulls away from the plenum due to poor original installation, letting 140°F attic air mix with your conditioned air and driving up bills.
- “Harvey leftovers” in 1970s-1980s metal duct systems. Post-Harvey insurance remediation in 77546 commonly replaced flooring and drywall but left original ductwork in place. We regularly scope return air plenums in older homes near Friendswood High School and find visible black mold growth and organic silt residue that was never addressed.
- Condensation damage from extreme humidity. Friendswood’s summer dew points above 75°F cause supply ducts to sweat continuously when insulation has delaminated, creating ideal conditions for mold even in homes that never flooded.
- Failed mastic seals from thermal cycling. The temperature swing between a 95°F Friendswood attic and 55°F conditioned air causes expansion and contraction that cracks original seals, particularly in homes with metal ductwork from the 1980s.
Pricing for Duct Repair & Sealing in Friendswood, TX
| Service | Typical Range in Friendswood |
|---|---|
| Duct sealing (mastic, single system) | $280-$480 |
| Flex duct repair (per run) | $180-$340 |
| Metal duct repair (section) | $320-$650 |
| Duct insulation (R-8 wrap) | $240-$520 |
| Full duct system inspection with camera | $89 (credited toward repair) |
What moves a job toward the higher end: attic accessibility, extent of flood or moisture damage, number of duct runs affected, and whether mold remediation is required before sealing can begin. We disclose the full price before starting. No bait coupons, no changes at the door. Our $50 Off Any Repair Over $250 applies to ductwork, and we offer a Free Second Opinion on Any Written Estimate if you’ve already been quoted elsewhere. Senior and veteran homeowners receive a permanent 5% discount.
We Also Serve Cities Near Friendswood
Our Duct Repair & Sealing in Friendswood operation extends to Webster, Pearland, League City, and Alvin. Each city gets different duct problems. Pearland’s higher elevation means less flood contamination but similar humidity loads. League City’s coastal exposure brings salt air corrosion we don’t see as much in Friendswood. We adjust our approach accordingly, but the 90-Day Done Right Promise and upfront pricing stay the same.
Serving Friendswood, TX - Our Local Coverage Area
We’re based in the Friendswood 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 Friendswood
Yes. Post-Harvey remediation in 77546 commonly replaced visible finishes but left original ductwork untouched, and we’ve scoped supply plenums in 2000s-era homes that looked pristine from the outside while harboring black mold and organic silt inside. Call (866) 347-2063 to schedule a camera inspection; the $89 fee is credited toward any repair we perform.
We access the duct system through attic openings or existing service ports, clean all joints and seams, then apply fiber-reinforced mastic sealant by brush or spray to create a permanent flexible bond that won’t dry and crack like foil tape. For 1970s metal ductwork near Friendswood High School, we often find original seals have failed from 40+ years of thermal cycling; mastic restoration typically costs $280-$480 and restores system efficiency without full replacement.
Every three to five years, or immediately after any water intrusion event. Friendswood’s 75°F+ summer dew points cause continuous condensation on under-insulated ducts, and attic-mounted air handlers concentrate this risk where the plenum meets the supply trunk. Our $89 Seasonal Tune-Up includes insulation inspection.
Yes. Sealing leaks and restoring insulation typically reduces cooling costs 15-25% in Friendswood homes, where systems already run longer than inland Texas markets due to humidity. The savings are most dramatic in homes with flex duct separation or post-flood insulation damage, where unconditioned attic air is being drawn directly into the system.
We use professional-grade mastic sealants and R-8 insulation products from Honeywell and Aprilaire, specified for Gulf Coast humidity zones. These materials resist the mold-promoting conditions that cheaper products fail under in Friendswood’s climate. We don’t recommend homeowner-grade foil tape or spray foam for duct sealing; neither holds up to our thermal cycling and moisture loads.
Ready to stop throwing money at duct leaks and musty air? Call (866) 347-2063 for a free estimate. We’ll show you exactly what your system looks like inside, quote an honest price before we start, and stand behind the work for 90 days with no paperwork required.
Written by Wade Kellerman, Owner at Bellows Air Duct & Vent Co. of Texas, serving Friendswood since 1984.