Changed Windows After the CF1R: What to Do
Compare the windows actually ordered with the CF1R on three numbers: U-factor, SHGC and glazing area by orientation. If they perform as well and the area has not grown, ask the department whether it wants an amendment. If they perform worse, are larger or face a different way, revise the CF1R before installing.
- Choose your report
- Upload your plans
- Pay securely
- Permit-ready report by email
Start with three numbers
The CF1R holds the U-factor and SHGC of each window, plus the glazing area by orientation. Section 10-103(a)2B applies when a specification changes before installation so the building may no longer comply: the building must be brought back into compliance on amended plans and certificates. The compliance manual calls a single-glazed metal window substituted for a specified high-performance double-pane vinyl one a clear case, and a change in window location or orientation hard to judge. Installed products are checked against their temporary labels, which must stay on until the department inspects.
Where the lines fall
- Same area, new product. Replacement windows meet the Table 150.1-A U-factor, 0.27 or 0.30 by zone, and the SHGC cap in zones 2, 4 and 6 to 15. The values are area-weighted averages, so one weaker window can be offset by better ones.
- Up to 75 square feet replaced. Section 150.2(b)1B allows a U-factor of 0.40 and an SHGC of 0.35 in zones 2, 4 and 6 to 14, but zone 15 stays at 0.23.
- Glass only. New glass in an existing sash or frame is a repair if it performs at least as well as the original.
- Area added. Alterations that add glazing must meet the Table 150.1-A area limits, 20 percent of floor area in total and 5 percent west-facing in zones 2, 4 and 6 to 15. Adding up to 16 square feet skips both area limits.
What to file
Re-run or amend the CF1R with the real product values, register the revision where registration applies, and resubmit. The installer then signs the CF2R-ENV-01-E fenestration installation certificate for what went in. Window replacement is named as a job with no field verification, so a department may waive or simplify the certificates for it, though the windows must still comply.
Product limits are covered in new windows and Title 24 and old single-pane glass in remodels with existing windows. The resubmittal order is on permit revisions, design changes on architect changes. Start a report from our residential page.
Common Title 24 Questions
- What is a CF1R certificate of compliance?
- What is a CF2R certificate of installation?
- What is a CF3R certificate of verification?
- What is an NRCC form?
- What is an NRCA certificate of acceptance?
- What is an LMCC form?
Frequently Asked Questions
Not necessarily. Section 10-103(a)2B turns on whether the change may take the building out of compliance, so ask the department whether it wants amended documents.
The temporary label must not be removed before the department inspects, because it shows the rated U-factor and SHGC the inspector compares with the certificate.
Explore Title 24 Revisions
- Changed the Roofing After the CF1R: What to Do
- Changed the Insulation or Wall Framing After the CF1R: What to Do
- The Solar System Is a Different Size Than the CF1R: What to Do
- Do Lighting Changes After the Report Need a Revised CF1R?
- The House Was Mirrored or Rotated After the CF1R: Is the Report Still Valid?
View all Title 24 Revisions guides → · Permits and Compliance · Title 24 guide