MR Flashcards
MR acronym
Materials and Resources
MR overall purpose
Credit Criteria are set up to encourage resource efficiency and support a life cycle approach, which in turn improves performance.
Emphasizes minimizing impacts and embodied energy associated with:
Maintenance Processing Extraction Transportation Disposal
…of building materials
MR facts
Construction and Demolition make up a large portion of the solid waste stream: 25% in EU & 40% in US
MR hierarchy of waste management
- Source Reduction (use less)
- Reuse (find other forms of usefulness as is)
- Recycle (process into other usable materials)
- Waste to energy (burn to make power)
Source reduction
Source Reduction:
Top of hierarchy, most effective form of efficiency.
Prevents environmental damages in a materials entire lifecycle: supply chain, use, recycling and disposal.
Promotes designing and prefabrication of dimensional construction materials and other innovative construction strategies to minimize inefficiencies and material cutoffs.
reuse
Production and transportation of new materials to replace old ones generates greenhouse gases and requires many years of increased efficiency to offset.
LEED Rewards all material reuse including insitu and off-site materials
Recycling
Most common diversion from landfills which are increasing unsustainable as land runs out and transportation costs increase.
Improved recycling technology allows for better processing and sorting to keep materials in the production stream for longer and supply raw materials to secondary markets.
Waste to energy
Alleviates burdens on landfills and the demand for energy from fossil fuel resources.
LCA
LIFE CYCLE ASSESSMENT
compilation and evaluation of the inputs and outputs and the potential environmental impacts of a product system throughout its life cycle.
Examines building products, evaluating its impacts, from “cradle to grave” …or “cradle to cradle”
LEED strives to speed up the use of LCA decision making to improve the quality of LCA databases and stimulate market transformations.
Because of the limitations of LCA, LEED uses complimentary approaches in its MR credits.
CSI
Construction Specification Institute
MR Credits pertain to “permanently installed building products” attached to or creating the building. Generally items within CSI (Construction Specification Institute) 3-10, 31 & 32.
MR cross-cutting issues
MR Credits only include the portions of the building that are being renovated or constructed. Untouched areas cannot count towards reuse.
MR Credits pertain to “permanently installed building products” attached to or creating the building. Generally items within CSI (Construction Specification Institute) 3-10, 31 & 32.
MR Credits may include or exclude project furniture, but it must be included or excluded in its entirety including in cost based credits.
Not included in LEED LCA Calculations: Process equipment Fire suppression systems Elevators Escalators Other special equipment
separate products vs ingredients
Products shipped to the site ready for installation:
Concrete masonry units, wallboard, metal studs are all separate products
For wallboard: the binder, the gypsum, and backing are all required for its function, so each ingredient is not a separate product.
Products shipped as a component or ingredient in a site-assembled product:
Since each component and concrete (aggregate, admixture, and cement) serves a different function, each component is considered a separate product.
Because different paint tapes of distinct gloss levels such as gloss, semi-gloss, and flat, are specified to serve different functions they are separate products.
Different colors of the same paint finish are not considered separate
products
Carpets of different pile height for different foot traffic functions are considered separate products.
Carpets of the same product line but in different colors are not considered separate products.
MR product costs
Product/material cost: includes all contractor expenses and taxes to ship material to project, but does not include cost of equipment and labor necessary for installation.
default material cost
calculates 45% of the total construction costs as an option to determine the total materials cost
actual material cost
cost of all materials used on job site including delivery and taxes but excluding labor.
Location Valuation Factor
adds value to locally produced materials and products to encourage the use of products manufactured, extracted, and purchased within one hundred 100 miles of the project. They are valued at two times their actual cost.
Two criteria required:
Manufacture, extraction, and purchase within 100 miles of the project.
Meet at least one of the sustainable criteria (recycled content, FSC certification, etc.) listed in the credit.