USGBC Updates LEED Rating System August 26, 2009

U. S. Green Building Council (USGBC) updated the LEED Rating System on April 27, 2009 as follows:

 

MR Credit 4: Recycled Content

 

1–2 Points

 

Intent

To increase demand for building products that incorporate recycled content materials, thereby reducing impacts

resulting from extraction and processing of virgin materials.

 

Requirements

Use materials with recycled content

recycled content plus 1/2 of the preconsumer content constitutes at least 10% or 20%, based on cost, of the total value of the materials in the project.

The minimum percentage materials recycled for each point threshold is as follows:

 

Recycled Content Points

10% 1

20% 2

 

The recycled content value of a material assembly is determined by weight. The recycled fraction of the assembly is

then multiplied by the cost of assembly to determine the recycled content value.

Mechanical, electrical and plumbing components and specialty items such as elevators cannot be included in this

calculation. Include only materials permanently installed in the project. Furniture may be included if it is included

consistently in MR Credit 3: Materials Reuse through MR Credit 7: Certified Wood.

 

Potential Technologies & Strategies

Establish a project goal for recycled content materials, and identify material suppliers that can achieve this goal.

During construction, ensure that the specified recycled content materials are installed. Consider a range of

environmental, economic and performance attributes when selecting products and materials.

 

MR Credit 5: Regional Materials

 

1–2 Points

 

Intent

To increase demand for building materials and products that are extracted and manufactured within the region,

thereby supporting the use of indigenous resources and reducing the environmental impacts resulting from

transportation.

 

Requirements

Use building materials or products that have been extracted, harvested or recovered, as well as manufactured,

within 500 miles of the project site for a minimum of 10% or 20%, based on cost, of the total materials value. If only

a fraction of a product or material is extracted, harvested, or recovered and manufactured locally, then only that

percentage (by weight) can contribute to the regional value. The minimum percentage regional materials for each

point threshold is as follows:

 

Regional Materials Points

10% 1

20% 2

Mechanical, electrical and plumbing components and specialty items such as elevators and equipment must not be

included in this calculation. Include only materials permanently installed in the project. Furniture may be included if

it is included consistently in MR Credit 3: Materials Reuse through MR Credit 7: Certified Wood.

 

Potential Technologies & Strategies

Establish a project goal for locally sourced materials, and identify materials and material suppliers that can

achieve this goal. During construction, ensure that the specified local materials are installed, and quantify the total

percentage of local materials installed. Consider a range of environmental, economic and performance attributes

when selecting products and materials.

 

 

 

 

such that the sum of postconsumer

 

 

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