The Best Duct Sealing Methods

Your home’s ductwork distributes heated or cooled air from your HVAC system to each room. But leaky, dirty, or poorly sealed ducts could cause you to lose significant amounts of conditioned air, driving up your energy bills and making your home less comfortable. Duct sealing closes gaps, cracks, and loose connections in your ductwork to improve airflow, efficiency, and indoor air quality.

Why Duct Sealing Matters

Even small gaps in your ducts can have a significant impact. The U.S. Department of Energy estimates your home can lose 20% to 30% of the air moving through your duct system due to leaks. That means you’re paying for air that never reaches your living spaces.

Sealing your ducts has multiple benefits.

  • Lower energy bills: Prevents wasted heating and cooling.
  • Improved comfort: Keeps temperatures more consistent throughout your home.
  • Better indoor air quality: Reduces dust, allergens, and pollutants entering through leaks.
  • Less strain on HVAC systems: Extends the lifespan of your furnace, air conditioner, or heat pump.

The Best Methods for Sealing Ductwork

Even if you have insulated ductwork, that doesn’t mean it’s properly sealed. If the insulation swells or fills with air every time your HVAC system turns on, it’s a telltale sign that air is leaking from the ducts underneath.

Professional duct sealing involves carefully removing or working beneath the insulation to locate and cover every accessible joint and connection in your ductwork. After sealing all leaks, Crawl Space Ninja’s will re-insulate the ductwork to restore efficiency and protection.

By sealing your ducts, you can:

  • Reduce wasted energy and lower your heating and cooling costs.
  • Improve indoor air quality by keeping dust, allergens, and pollutants out of your airflow.
  • Enhance comfort with more consistent temperatures from room to room.
  • Extend your HVAC system’s life by reducing equipment strain.

Our pros work manually, precisely sealing every accessible joint in your system. This meticulous approach ensures long-lasting results and a noticeable improvement in your home’s comfort and efficiency.

Materials You Should Avoid

Not all duct sealing products are equal. Some materials can do more harm than good by failing prematurely, damaging your ductwork, or introducing harmful chemicals into your home’s air supply. Choosing the wrong sealant could mean wasted money, reduced efficiency, and even health risks for your family. Steer clear of these products to protect your investment and indoor air quality.

  • Standard cloth duct tape: Despite the name, it’s not ideal for ducts and will quickly dry out, crack, and peel away.
  • General-purpose glues or sealants: These may not handle HVAC temperature ranges or air pressure.

Why Hire the Professionals at Crawl Space Ninja?

Duct sealing might sound simple, but doing it correctly requires expert knowledge, quality materials, and proper preparation. When you call our team, we will:

  • Inspect your duct system for leaks, damage, and air balance issues.
  • Only use high-quality, HVAC-approved materials.
  • Seal ducts without restricting airflow or causing damage.
  • Combine sealing with cleaning, insulation, or repairs for maximum performance as needed.

Stop losing air – and money – through leaky ducts. Contact us today to request an estimate for our professional duct sealing services and ask how we can help you enjoy a healthier, more energy-efficient home.

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