Chapter 11 Clarification: 2020 NGBS Mandatory Practices

Published Thursday, April 22, 2021

The 2020 NGBS Section 3 – Compliance Method provides rules for remodeled buildings, and subsection 305.2.3 Mandatory Practices for whole-building ratings states that, "Unaltered portions of the existing building shall not be required to meet Mandatory requirements except when life safety or apparent moisture issues exist." This exception applies to Section 11 Remodeling, including the new prescriptive options for energy efficiency compliance in the following subsections. 

Download the Detailed Clarification