Heat Pump Plan Weatherization Standards for Existing Homes

Heat Pump Plan Weatherization Standards for Existing Homes
Attic Insulation
Applicability. Attic and ceiling insulation shall be installed when the existing effective insulation value is less than R-19 or when vertical walls surrounding conditioned rooms in the attic area do not have effective existing insulation.
Material Specifications for Blocking Materials. The following materials shall be used to provide any required blocking around heat-dissipating objects, attic accesses, pull-down stairways, chimneys, vent pipes from gas- or oil-fired appliances, etc.: • Mineral fiber batts • Sheet metal • Gypsum board (sheetrock) • Wood • Other materials approved by TVA prior to their installation