PD_Q16_Windows Version 7.1.1

Rater/RFI verifies and documents the correct window types, U-values, SHGCs, areas, orientations, overhangs, shading and wall assignments. On ridealong Field QA Reviews (remote or in-person), does Rater/RFI take any measurements of the windows to verify that plans and as-built windows match, or take full window measurements if no plans? Does Rater/RFI verify overhang dimensions while onsite? Appendix B states, "Each unique window type and U-value combination shall be calculated separately."

• If the windows are all of the same type, but only vary in size, it is acceptable to group window areas by orientation. However, be sure that these groupings are broken out by shading if not all shaded the same (e.g. some windows on the back of the house are shaded by a porch overhang while some are not).
• Where some software allows for an automatic rotation of the orientation of a house, the “front” of the house can easily be lost. For this reason, it is best practice to include the word “front” in the label of at least one of the windows on the front of the house.

SCORING:

• Satisfactory: No errors in window verification
• 1: One to four minor errors (listed below) in window verification (accumulated errors of all windows [individual or grouped])
• 2: Five to ten minor errors (listed below) in window verification OR one to two major errors in window verification (accumulated errors of all windows [individual or grouped])
• 3: Eleven or more minor errors (listed below) in window verification OR three or more major errors in window verification (accumulated errors of all windows [individual or grouped])

GUIDANCE:

Minor Window Verification Errors:

• U-Value off by 0.02 to 0.04
• SHGC off by 0.02 to 0.04
• Surface Area of each window off by 5% to 10%
• Overhangs greater than 1' not verified (whether this is for soffits, porchs, decks, etc.) or depth/top/bottom height errors > 1' in these values

Major Window Verification Errors:

• U-Value off by 0.05 or greater
• SHGC off by 0.05 or greater
• Surface Area of each window off by >10%
• Assigns Window to incorrect orientation
• Assigns Window to incorrect wall