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Take the ‘Performance Path’ to Energy Code Compliance with Wood Structural Panels

Updated guidelines help builders reduce costs while increasing flexibility.

Brought to you by APA – The Engineered Wood Association

Save on construction costs while meeting the updated requirements of the 2024 International Energy Conservation Code (IECC).

Sounds difficult? It’s not — if you use plywood or OSB wood structural panels, and a “performance path” for compliance. By considering the energy performance of the whole house and replacing expensive wall assembly options with cost-effective alternatives like wood structural panels, builders can save money and still meet code requirements.

An explanation of the benefits of the performance path as it relates to energy code compliance and wood structural panels are explored in an APA publication, The Performance Path for Energy Code Compliance, and a related on-demand webinar. Both resources have been updated to include compliance options for the recently released 2024 IECC.

Performance Path vs. Prescriptive Path

A “prescriptive path” dictates the construction of the thermal envelope. Required components are spelled out, usually referenced by the R- or U-value in the code table. In contrast, the performance path gives builders options as long as the house still meets or exceeds energy efficiency and code requirements. An independent energy rating professional compares the energy performance of a proposed performance path design with one configured to the prescriptive reference design. If the proposed design meets or exceeds the reference design’s performance, builders are able to use it.

In 2015, 2018, 2021 and again in 2024, the IECC was updated with new standards that impact exterior walls, attic insulation, HVAC systems and other energy efficiency concerns. Despite these changes, the performance path still offers builders one of the best ways to ensure compliance.

That’s because it offers flexibility since traditional, code-compliant construction methods remain acceptable. For example, continuous wood structural panel sheathing, known for its superior strength, is still approved. That strength allows builders to use narrow wall segments and a range of window sizes and placements. Plus, the sheathing reduces costs and supports energy performance.

Updated Guidance

The updated APA publication, The Performance Path for Energy Code Compliance, Form R505, incorporates changes to the 2015, 2018, 2021 and 2024 IECC. Among them:

Energy recovery ventilators (ERVs) and ductless heat pumps were added to Table 2.
Table 3, a simulated performance solutions table, is updated to reflect the new codes.
All energy modeling now uses data from the new codes and U.S. Energy Department reference home.

Looking for more? Check out APA’s Using the Performance Path for Energy Code Compliance webinar now available on demand. It offers tips on how to offset energy losses and ensure a code-compliant, energy-efficient home. The webinar qualifies for AIA and ICC continuing education credits.

Or contact your local APA Engineered Wood Specialist for a complimentary consultation.