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HESP Weatherization

Jan 25, 2018

Wall Insulation

  • Walls must be insulated to one of the following levels:
    1. Enclosed cavities were filled to capacity with dense-pack insulation
    2. Open cavities were filled to capacity with low density spray foam
    3. High density spray foam was applied to within 1.5” of the surface of cavities that were subsequently enclosed
    4. Walls were covered by a minimum of 2” of rigid foam insulation (applied over the studs)
  • Batt insulation not eligible for rebates
  • Upgrade must be followed by a Building Performance Institute (BPI) energy assessment
  • Code-approved fire protection was added to foam insulation when applicable
  • Cost of insulating the walls must be at least $1000 more than rebate amount

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