Strengthening Confidence in HERS® Ratings Through Photo Documentation Photo documentation can often feel like just one more task in an already detailed Rating process. However, in practice, photographs serve as the primary supporting evidence behind the data inputs used in a HERS Rating. The basis of every Confirmed Rating is field verification. Photographs of wall and ceiling assemblies, mechanical system details, test results, and appliances provide a direct link between what was observed and measured and what is entered into the Rating software. Supporting Data Integrity and QA Confidence Photographs are essential to building confidence in a Rating file. They allow QA reviewers to: Confirm that installed systems match the model. Verify key performance inputs, such as equipment or appliance efficiency and test results. Identify key building features and ensure that they are modeled correctly. Complete, consistent documentation strengthens the reliability of every Rating and makes the QA process more efficient. Incomplete documentation, by contrast, can result in additional QA findings and unnecessary project delays. Thorough documentation ensures that every Rating can withstand scrutiny, whether reviewed by a Provider, RESNET Staff, or an independent third party. Reducing Risk for Raters, Providers, and Builders Strong photo documentation isn’t just about the QA review; it helps mitigate risk across the entire project. For HERS Raters, thorough documentation provides protection. It creates a defensible record of what was observed in the field and helps answer questions that may come up after the site visit. If a modeled input is questioned later, clear photos can help support the Rater’s decision and reduce the need to rely on memory or assumptions. For HERS Providers, good documentation supports stronger oversight. It helps Quality Assurance Designees (QADs) complete reviews more efficiently and with greater consistency. It can also reduce the need for follow-up site visits, repeated requests for clarification, or guesswork when reviewing a file. This saves time and money. For Builders, a well-documented Rating file supports energy performance claims, program compliance, and customer confidence. Builders rely on Ratings for verification programs, incentives, and market recognition. Clear documentation helps support these uses and reduces the risk of disputes or compliance challenges. In all cases, better documentation leads to fewer surprises. Aligning with the Standards and Going Beyond The HERS Standards establish minimum photographic requirements, including documentation of major systems, test results, and building elevations, as found in Section 904.3.2.7.3 and Appendix B of ANSI/RESNET/ICC 301. These requirements serve as the baseline for compliance and must always be met. A list of required photos can be found here. However, it is important to recognize that these minimums are just that: minimums. Providers may implement additional documentation requirements based on their own internal policies. Projects involving additional certifications such as EEPs or HVAC Grading often require expanded documentation. For Raters and field inspectors, a good approach to photo documentation is to treat it as evidence-building, capturing everything necessary to clearly support the Rating, not just what is strictly required. The following are examples of rated features that require some form of documentation, but not necessarily photos. In these cases, field data collection forms or purchase orders can be accepted, but the use of photos as the form of documentation is considered a best practice: If an appliance is not present, a photo of the empty location supports the use of defaults. If a pre-drywall inspection was not completed, photo documentation of the finished wall is one way to support the use of default insulation grading. Where ceiling fans or low-flow water fixtures are installed and modeled, a photo of those features is one way to provide the necessary supporting documentation. It is important to note that all supporting documentation for a completed HERS Index Rating is required to be kept for a minimum of three years. Building Better Habits in the Field Despite its importance, photo documentation is one of the most common areas where QA findings occur. This is generally not due to lack of knowledge, but rather inconsistencies in execution. Common issues include: Missing photos of key systems or components Lack of visible nameplates or model numbers Incomplete documentation of test results “Washed out” photos with bad lighting or lens flare obscuring critical details Improving photo documentation does not require major process changes, but it does require consistency and attention to detail. Simple practices can make a significant difference: Capturing clear, properly lit images of all relevant systems (especially important in dark attics, or when light conditions are poor) Having proper date-and-time stamps on the photos, as required by the Standard Ensuring nameplates and model numbers are legible Reviewing photos before leaving the job site These habits not only reduce QA findings but also improve overall efficiency by minimizing the need for follow-up visits or guesswork. Photographic documentation strengthens trust in the HERS Index Rating system. By changing the focus from “checking the box” to “supporting the data”, Raters, Providers, and Builders can work together to reduce risk, improve quality, and build a stronger, more trusted system. We’re Here to Help The RESNET QA Team is here to help. If you have any questions regarding photo documentation requirements or QA expectations, please contact the team at technicalsupport@resnet.us.
