In the LEED

Like in the Water Efficiency category, many of the Materials and Resources credits maintain the same intentions and implementations, but additional points may be achieved through higher percentages or higher performance of the intention. MR1.1 and MR1.2 are EXACTLY the same, except you can earn two points by achieving the 95% requirement in MR1.2. Please note that credit MR1.3 should be treated as a separate credit with different means of implementation, as you will see when you get there.

Maintain 95% of Existing Walls, Floors, and Roof

Intention:

1. Extend the life cycle of existing building stock
2. Conserve and retain cultural resources
3. Reduce waste
4. Reduce environmental impact with regards to manufacturing materials and their transport

Implementation:

• Reuse existing building structure
• Exclude:
  • windows
  • doors
  • non-structural material
  • MEP (mechanical, electrical, plumbing)
  • Elevator equipment
  • hazardous material (which should be removed)
• Includes:
  • Flooring
  • Framing
  • Roof
  • Exterior Structure (envelope)
• Calculation:
  • USE SQUARE FOOTAGE (sq.ft.)
• If addition to an existing building is more than 2 times the original, credits 1.1 & 1.2 are not applicable.

Codes/Standards Applied:

1. none

Extra Credit:

• none

Submittal Phase:

• Construction (tip: all Materials and Resources credits are submitted in the construction phase except MR P1)

Links from Reference Guide:

1. none

Other Materials & Resources Credits

• MR P1 - Storage and Collection of Recyclables (prerequisite)
• MR 1.1 - Building Reuse, Maintain 75% of Existing Walls, Floors, & Roof
• MR 1.2 - Building Reuse, Maintain 95% of Existing Walls, Floors & Roof
• MR 1.3 - Building Reuse, Maintain 50% of Interior Non-Structural Elements
• MR 2.1 - Construction Waste Management, Divert 50% from Disposal
• MR 2.2 - Construction Waste Management, Divert 75% from Disposal
• MR 3.1 - Materials Reuse, 5%
• MR 3.2 - Materials Reuse, 10%
• MR 4.1 - Recycled Content, 10% (post-consumer + 1/2 pre-consumer)
• MR 4.2- Recycled Content, 20% (post-consumer + 1/2 pre-consumer)
• MR 5.1 - Regional Materials, 10% Extracted, Processed & Manufactured Regionally
• MR 5.2 - Regional Materials, 20% Extracted, Processed & Manufactured Regionally
• MR 6 - Rapidly Renewable Materials
• MR 7 - Certified Wood

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