V8 File QA Q17: AGW

PHOTO REQUIRED of above grade wall insulation per ANSI/RESNET/ICC 301 APPENDIX B and HERS® Standards Chapter 9. Raters/RFIs are responsible for documenting reasons for missing photos. For above grade walls, confirm that the wall types, insulation types, insulation materials, insulation thicknesses, insulation grades, R-values, stud types, stud spacings/dimensions, framing factors, surface areas, surface colors, orientations, and locations which are entered into the software correspond with field-verified plans and/or field data collected by the Rater/RFI for the actual condition of the rated home. For rim and band joists, confirm that the types, R-values, surface areas and locations which are entered into the software correspond with field-verified plans and/or field data collected by the Rater/RFI for the actual condition of the rated home. *Be sure that where multiple above grade wall types exist or where multiple rim/band joists types exist they are handled separately, including where their “location” with respect to conditioned areas of the home may vary between wall/rim and band types and within the same wall/rim and band type.

SCORING: "Satisfactory": when all mandatory photos are provided and no errors in modeling "1": one to two minor errors (listed below) in modeling (this is per modeled wall) "2": three to four minor errors (listed below) in modeling OR one to two major errors (listed below) in modeling (this is per modeled wall) "3": five or more minor errors (listed below) OR three or more major errors (listed below) in modeling (this is per modeled wall) "Missing Photo": 1 or more of the mandatory photos are missing "Missing Photo + "1": 1 or more of the mandatory photos are missing, plus "1" per scoring above "Missing Photo + "2": 1 or more of the mandatory photos are missing, plus "2" per scoring above "Missing Photo + "3": 1 or more of the mandatory photos are missing, plus "3" per scoring above

GUIDANCE: Minor AGW Modeling Errors:

• Incorrect Wall Construction modeled
• Insulation R-Value of each modeled AGW off by 5% to 10%
• Insulation thickness of each modeled AGW off by 0.5 to <1.0 inch
• Incorrect Gypsum thickness modeled
• AGW Surface Area of each modeled AGW off by 4% to 7%
• Incorrect surface color modeled (if custom value is modeled, Solar Absorptance rate within reason)
• Incorrect Insulation Location modeled Major AGW Modeling Errors:
• Insulation R-Value of each modeled AGW off by greater than 10%
• Insulation thickness of each modeled AGW off by greater than 1.0 inch
• Incorrect Insulation Grade value modeled (based on ANSI/RESNET/ICC 301 Appendix A - depth/void variance for insulation type and grade)
• Incorrect stud depth, spacing, or framing fraction modeled
• AGW Surface Area of each modeled AGW off by greater than 7%
• Assigns AGW to incorrect orientation