For the Materials and Resources Credit, Interiors Life Cycle Impact Reduction, Option 1. Interior

Reuse, the calculation includes items that are demolished and not replaced. This is because the

credit aims to encourage the reuse of interior nonstructural elements to reduce the need for new

materials and minimize waste, thus contributing to a reduction in life cycle impacts1.

Reference:

LEED v4 Reference Guide for Interior Design and Construction2.

LEED credit library for Interiors Life-Cycle Impact Reduction3.

LEEDuser’s guide on CI-v4.1 MRc2: Interiors life-cycle impact reduction1.

In the context of LEED AP Interior Design + Construction, especially under Materials and Resources

Credit for Interiors Life Cycle Impact Reduction, Option 1. Interior Reuse, the aim is to encourage the

reuse of interior nonstructural elements to reduce the need for new materials and minimize waste.

The calculation for this credit involves determining the area of interior nonstructural elements that

are reused. Items that are demolished and not replaced are included in this calculation because their

non-replacement implies a reduction in the demand for new materials, thereby contributing to

resource conservation and waste minimization. This approach aligns with the LEED principles of

sustainable materials management and waste reduction. It's important to note that the calculation

excludes elements that are not part of the interior nonstructural scope, such as exterior windows,

doors, and structural floor assemblies. Hazardous materials remediated as part of the project are also

excluded, as their handling is governed by specific environmental and health safety regulations.

Reference:

LEED v4 for Interior Design and Construction Reference Guide

LEED v4 BD+C Reference Guide, specifically the sections related to Materials and Resources Credit,

Interiors Life Cycle Impact Reduction