Sterling AirOKC & Edmond HVAC
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Ductwork Repair & Sealing in OKC

Leaky ducts send 20–30% of your conditioned air into the attic before it reaches a single room. If some rooms are always hot or your electric bill is high despite a newer system, the ductwork is often the real problem.

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Signs You Have Duct Leaks

  • ✓One room is always significantly hotter or cooler than the rest of the house
  • ✓High electric bills that don't match your AC's efficiency rating
  • ✓System runs constantly but the house never gets quite cool enough
  • ✓Visible gaps at duct connections in the attic or crawlspace
  • ✓Dusty supply registers even with a clean filter
  • ✓Humidity issues in certain rooms despite proper AC operation
Oklahoma attics get to 150°F in summer. Air leaking out of supply ducts in the attic isn't just wasted — it's pulling in 150-degree air through return leaks too. Sealed ducts make a noticeable difference in cooling performance and electric bills.

What We Do

  • ✓Visual inspection — identify visible gaps, disconnected flex ducts, and unsealed boot connections
  • ✓Mastic sealing — durable mastic or UL-listed metal tape applied at joints (not duct tape, which fails within months)
  • ✓Insulation wrapping — flex duct insulation that has deteriorated adds unnecessary heat gain
  • ✓Flex duct replacement — crushed, kinked, or failed flex duct sections replaced with properly supported new material
  • ✓Boot-to-drywall sealing — register boots sealed at the ceiling or floor for maximum system efficiency

Duct Replacement vs. Sealing

Not every leaky duct system needs full replacement. If the ductwork is structurally sound — just leaking at connections — sealing and insulation adds years of service. We'll tell you honestly when replacement makes more sense.

Full duct replacement typically makes sense when flex duct is 15+ years old, severely crushed in multiple runs, or when the system was undersized from the original install.

FAQ

Ductwork Questions

How much does duct sealing cost?

Sealing a typical home's accessible ductwork runs $300–$700 depending on the size of the system and how many problem areas need attention. Full duct replacement costs more — we'll quote it separately if needed after inspection.

Can duct leaks cause health problems?

Return duct leaks in the attic or crawlspace can pull in attic insulation fibers, mold spores, or rodent debris and distribute it through the house. Sealing return ducts is especially important for air quality reasons.

Will sealing my ducts actually lower my electric bill?

In homes with significant duct leakage, yes — often noticeably. Energy Star estimates that duct sealing can reduce HVAC energy use by 20% or more in leaky systems. The savings depend on how bad the leakage was to start.

What's wrong with using regular duct tape on ducts?

Standard duct tape — despite its name — fails quickly in hot attic environments. The adhesive dries out within months. Mastic sealant and UL-listed foil tape are the code-compliant materials that actually hold up over time.

Serving the OKC Metro

Oklahoma City · Edmond · Yukon · Piedmont · Moore · Norman · Mustang · Nichols Hills · Midwest City

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