CERTIFICATION AGENCY INTERPRETATION & GUIDANCE
Our NGBS Interpretations and Guidance documents provide clarifications on technical and verification issues related to NGBS Green certification
File Under: Chapter 11: Existing Building
Most practices within Chapter 11 Existing Buildings are identical to the corresponding New Construction practices within Chapters 5-10.
Practice 11.901.2.1 in the Existing Buildings chapter includes the same text as 901.2.1 in the Indoor Environmental Quality chapter for New Construction. Although point values are not included for 11.901.2.1, they are specified for 901.2.1.
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File Under: Chapter 11: Existing Building
For Existing Buildings, § 11.701.4.6 Fenestration Specifications and § 11.701.4.7 Replacement Fenestration are mandatory practices that require new or replaced fenestration products to meet the values as specified in Table 703.2.5.1.
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File Under: Chapter 11: Existing Building
Verifiers working on existing mixed-use buildings, where there is no planned renovation to the existing commercial space(s) have asked if Home Innovation allows certification of the entire building, not just the residential portion of the building. The answer is yes, there is a path for certification of the whole building as discussed below.
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File Under: Chapter 11: Existing Building
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.
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