Ductwork Repair Cost: Leaks, Sealing, and Replacement Price Breakdown
Your ductwork is responsible for delivering heated and cooled air throughout your home. When ducts leak, collapse, or become damaged, your HVAC system works harder—leading to uneven temperatures, weak airflow, and higher energy bills.
If you’re wondering how much ductwork repair costs, this guide breaks down common duct problems, typical price ranges, and when repair or full replacement makes more sense.
Leaky or damaged ducts can waste a significant amount of heated or cooled air.
Quick Answer: How Much Does Ductwork Repair Cost?
In the U.S., ductwork repair costs typically range from $200 to $1,500+. Minor sealing or insulation repairs are on the low end, while major duct replacement projects can cost several thousand dollars depending on home size and accessibility.
What Affects Ductwork Repair Cost?
- Type of damage: small leaks vs collapsed or disconnected ducts
- Repair method: sealing, patching, insulating, or replacing sections
- Accessibility: attic, crawl space, walls, or ceilings
- Home size: more ducts = higher labor and material costs
- Duct material: flexible ducts, sheet metal, or fiberglass
Common Ductwork Problems (And What They Cost)
- Duct sealing (air leaks): $200 – $600
- Duct insulation repair: $300 – $1,000
- Disconnected or crushed ducts: $250 – $800
- Mold or moisture issues: $500 – $2,000+
- Partial duct replacement: $500 – $2,000+
Sealing duct leaks can significantly improve airflow and reduce energy waste.
Signs Your Ductwork Needs Repair
- Uneven temperatures between rooms
- Weak airflow from vents
- High energy bills without explanation
- Excess dust in your home
- Whistling or rattling noises in walls or ceilings
- Musty odors (possible moisture or mold)
Duct Sealing vs Duct Replacement: What’s the Difference?
Duct sealing focuses on closing leaks and gaps using mastic, foil tape, or aerosol sealants. It’s usually the most cost-effective option.
Duct replacement involves removing and installing new ducts—often required if ducts are old, collapsed, poorly designed, or contaminated.
Repair vs Replace: Is Ductwork Replacement Worth It?
Old or poorly designed duct systems may need replacement to restore efficiency.
✅ Repair Makes Sense If:
- Leaks are minor and ducts are structurally sound
- Ducts are less than 15 years old
- Airflow issues are limited to specific areas
❌ Replacement May Be Better If:
- Ducts are crushed, undersized, or poorly designed
- There is widespread mold or contamination
- Home comfort issues persist after sealing
- You’re upgrading or replacing your HVAC system
DIY vs Professional Ductwork Repair
Homeowners can sometimes seal visible duct joints with foil tape, but most duct problems require professional testing (like pressure testing) to find hidden leaks.
Professional duct sealing ensures leaks are fixed correctly without restricting airflow or causing condensation problems.
How to Reduce Ductwork Repair Costs
- Schedule duct inspections during HVAC maintenance visits
- Fix small leaks early before damage spreads
- Keep ducts insulated in attics and crawl spaces
- Combine duct repairs with other HVAC work to reduce service calls
FAQ
1) Can leaky ducts really increase energy bills?
Yes. Leaky ducts can waste 20–30% of conditioned air, forcing your HVAC system to run longer.
2) How long does ductwork last?
Well-installed ductwork can last 20–30 years, but poor design or moisture can shorten its lifespan.
3) Is duct replacement messy?
It can involve attic or crawl space work, but professional crews minimize disruption and clean up after installation.
Conclusion
Ductwork repair costs typically range from $200 to $1,500+, depending on the type and extent of damage. Sealing and insulation repairs are often affordable and effective, while full duct replacement is a larger investment that can significantly improve comfort and efficiency.
If your home has ongoing airflow or comfort issues, a professional duct inspection can help determine whether repair or replacement is the smartest option.
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