LEED Materials and Resources Cycles 4 — Questions and Answers
Question 1: What is the minimum percentage of total building material cost that must come from products with EPDs to earn one point under LEED v4 Building Product Disclosure and Optimization – Environmental Product Declarations?
- 10% of total material cost
- 20% of total material cost (Correct answer)
- 30% of total material cost
- 50% of total material cost
Correct answer: 20% of total material cost
LEED v4 requires that 20 different products from 5 different manufacturers have EPDs, or that products representing 20% of total material cost by value have EPDs for one point.
Question 2: How does LEED v4 define 'permanently installed' materials for the purpose of materials credits?
- Any material that cannot be removed without tools
- Materials that form the building's physical structure and envelope, including finishes (Correct answer)
- Only structural steel and concrete elements
- Materials installed by licensed contractors only
Correct answer: Materials that form the building's physical structure and envelope, including finishes
LEED defines permanently installed materials as those that become part of the building's physical fabric, including structure, envelope, interior finishes, and mechanical systems.
Question 3: A salvaged brick from a demolished building is used in a new LEED project. Which LEED credit does this contribution count toward?
- Low-Emitting Materials
- Building Product Disclosure – Material Ingredients
- Building Product Disclosure – Sourcing of Raw Materials (reuse/salvage pathway) (Correct answer)
- Construction and Demolition Waste Management
Correct answer: Building Product Disclosure – Sourcing of Raw Materials (reuse/salvage pathway)
Salvaged or reused materials qualify under the Sourcing of Raw Materials credit's reuse pathway, as reuse is a responsible sourcing strategy that avoids new resource extraction.
Question 4: Which of the following is NOT a recognized waste diversion method under LEED Construction and Demolition Waste Management?
- Donating usable materials to a nonprofit reuse organization
- Selling scrap metal to a recycler
- Burying clean fill on an adjacent property (Correct answer)
- Sending food-contaminated wood to a composting facility
Correct answer: Burying clean fill on an adjacent property
Burying material on an adjacent property is not a recognized diversion method; LEED requires materials to be sent to recycling, reuse, or composting facilities.
Question 5: The 'Interiors Life-Cycle Impact Reduction' credit in LEED v4 Interior Design + Construction (ID+C) can be earned by doing which of the following?
- Reusing 25% of existing interior non-structural elements by area (Correct answer)
- Installing all new materials with low VOC emissions
- Achieving 100% FSC-certified wood in the interior
- Using only materials manufactured within 500 miles
Correct answer: Reusing 25% of existing interior non-structural elements by area
One pathway for this credit is reusing at least 25% of existing interior non-structural elements such as flooring, ceilings, and partitions by surface area.
Question 6: What is a 'Product Category Rule' (PCR) in the context of EPDs used for LEED credits?
- A manufacturer's internal quality control checklist
- A standardized set of rules defining how an LCA is conducted for a specific product category (Correct answer)
- A government regulation on hazardous material labeling
- A LEED scorecard category for materials
Correct answer: A standardized set of rules defining how an LCA is conducted for a specific product category
A PCR provides the methodological framework for conducting a consistent and comparable life-cycle assessment within a product category, enabling meaningful EPD comparisons.
Question 7: Under LEED v4.1, which update was made to the Construction and Demolition Waste Management credit compared to v4?
- The minimum diversion threshold was raised from 50% to 90%
- Projects can now use a combination of waste diversion rates and absolute waste generated per floor area (Correct answer)
- Composting was removed as an acceptable diversion method
- Only weight-based reporting is now accepted
Correct answer: Projects can now use a combination of waste diversion rates and absolute waste generated per floor area
LEED v4.1 introduced a dual pathway allowing projects to demonstrate compliance by achieving a low absolute waste generation rate (kg per m²) in addition to or instead of a diversion percentage.
LEED Materials and Resources Cycles 4
What is the minimum percentage of total building material cost that must come from products with EPDs to earn one point under LEED v4 Building Product Disclosure and Optimization – Environmental Product Declarations?