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DOE Weatherization Installer,
Part 2 - Intermediate

Course Outline


Aligning Pressure and Thermal Boundaries

  • Understand the difference between thermal and air barriers.
  • Know the proper location of thermal and air barriers.
  • Recognize common locations and signals of gaps in pressure and thermal barriers, and know how to repair these gaps.
  • Recognize typical construction details that lead to gaps in pressure and thermal boundaries and know how to treat them.
  • Understand treatment options for walk-up attics.
  • Recognize use of blower door pressure diagnostics to locate and evaluate air boundary.

Air Sealing and Attic Prep

  • Understand basic principles of air leakage.
  • Recognize typical air leakage sites in attics.
  • Be familiar with the various tools and materials used in air sealing and attic preparation.
  • Understand high-temperature issues and how to treat them.
  • Understand safety concerns related to wiring.
  • Know how to prepare an attic for air sealing and insulation.

Spray Foam Insulation

  • Understand the use of spray foam in weatherization.
  • Identify foam product options and their uses.
  • Become aware of advantages and limitations of different spray foam products.
  • Understand the need for proper ventilation and personal protection equipment.

Mechanical Ventilation

  • Understand the importance of maintaining healthy IAQ and combustion air, and the role of mechanical ventilation.
  • Recognize that leaving homes leaky is not proper ventilation.
  • Recognize and be familiar with appropriate ASHRAE guidelines.
  • Understand how to calculate building volume.
  • Understand static pressure and how to account for it when sizing fans.
  • Be able to name guidelines of proper duct installation.

Attic Insulation

  • Learn the importance of following cost-effectiveness guidelines when insulating attics.
  • Recognize that proper attic treatment can save up to 20% of home heating and cooling bills.
  • Understand that, combined with air sealing, attic insulation reduces the likelihood of structural damage due to condensation on the roof deck.
  • Learn the process for insulating attics with blown-in cellulose.

Dense-Pack Sidewall Insulation

  • Learn the importance of achieving uniform density at the targeted R-value throughout the cavity.
  • Become familiar with typical tools for the job, including safety equipment.
  • Become familiar with basic equipment maintenance protocols.
  • Learn the proper order of operations for blowing in dense-pack sidewall insulation.

Dryer Vents

  • Learn guidelines for dryer vent installation.
  • Become familiar with proper vent materials and connections.
  • Learn the importance of proper materials and installation as related to moisture and fire hazards.
  • Understand guidelines for exterior exhaust hoods.

Basements and Crawl Spaces

  • Identify various foundation types.
  • Understand basement and crawl space moisture dynamics.
  • Learn criteria for placement of thermal and pressure boundaries.
  • Become aware of basement and crawl space retrofit options.
  • Identify techniques for basement and crawl space retrofits.
  • Identify diagnostic procedures associated with weatherizing basements and crawl spaces.

Windows and Doors

  • Gain an understanding of window terminology.
  • Understand how windows lose and gain heat.
  • Become aware of the savings-to-investment ratio for window and door replacement compared to other building shell retrofits.
  • Identify various methods and materials for window and door treatments.
  • Understand recommended window and door replacement criteria.
  • Identify methods and techniques for replacing windows and doors.

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