duct leak

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New Videos: Sealing Ducts and Installing Dense-Packed Cellulose

GBA presents two new videos, both recorded at NESEA's Building Energy 13 conference in Boston

Posted on Apr 17 2013 by GBA Team

GBAGreenBuildingAdvisor.com has released two new videos: one on installing dense-packed cellulose in stud cavities, and the other on sealing duct seams with mastic.

Both videos were recorded in March 2013 at NESEANorth East Sustainable Energy Association. A regional membership organization promoting sustainable energy solutions. NESEA is committed to advancing three core elements: sustainable solutions, proven results and cutting-edge development in the field. States included in this region stretch from Maine to Maryland. www.nesea.org's Building Energy 13 conference in Boston.


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Image Credits:

  1. GBA video

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How to Track Down Leaks in Forced-Air Ductwork

Can ducts be effectively sealed from the inside?

Posted on Nov 14 2011 by Scott Gibson

Leaky ducts in a forced-air heating and cooling system are an all-too-common problem contributing to significant energy losses and lower indoor air quality.

Mark Renfrow knows that. Duct tests at his 3,400-sq. ft. home revealed “huge leakage.” A contractor addressed the problem by applying mastic to any accessible ductwork. But the key word is “accessible.” Many parts of the system apparently are not so easy to reach.


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Image Credits:

  1. Aeroseal

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Sealing Ducts: What’s Better, Tape or Mastic?

Make sure you choose products that provide durable sealing

Posted on Aug 6 2010 by Martin Holladay

Most residential duct systems have numerous leaks that waste energy and lead to room-to-room pressure imbalances. Unfortunately, though, few building inspectors outside of California bother to enforce existing code requirements that residential duct seams be sealed with mastic or high-quality duct tape.


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Image Credits:

  1. Image #2: ITW TACC
  2. Image #3: Berry Plastics
  3. Image #4: McGill AirSeal

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Duct Leakage Testing

For an energy-efficient forced-air system, seal seams with mastic and test with a Duct Blaster

Posted on Feb 19 2010 by Martin Holladay

For years, Americans who would never put up with leaky plumbing pipes have been willing to accept leaky ducts. While water damage is hard to ignore, the damage caused by leaky ducts is more subtle. Yet leaky ducts not only waste huge amounts of energy — they can also lead to comfort complaints, moisture problems, mold, and rot.


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Image Credits:

  1. Residential Energy Builders Guide, University of Kentucky
  2. Florida Solar Energy Center

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