Section 2: Individual LEED Credit Reviews
LEED Credit MR-5.2:
Because this credit tracks the raw materials used in
construction products, it is generally more viable to
Regional Materials: 50%
target products with relatively few material
constituents (e.g., concrete, brick) than more
Extracted Regionally
complex products such as glazings, carpets, or
finished casework. Products that incorporate high
amounts of recycled content, such as steel, may
Intent
also be difficult to track from a raw materials
standpoint.
Increase demand for building materials and
products that are extracted and manufactured
Basis for Cost Assumption
within the region, thereby supporting the
regional economy and reducing the
For both the Courthouse and Office Building
environmental impacts resulting from
models, LEED calculations have been developed
transportation.
to demonstrate how the 50 percent extracted
materials threshold can potentially be achieved (see
Requirement
"Supporting Calculations" below).
Of the regionally manufactured materials
Courthouse
documented for MR Credit 5.1, use a minimum
of 50% of building materials and products that
In the Courthouse model, different assumptions
are extracted, harvested or recovered (as well as
are used for the "low cost" and "high cost"
manufactured) within 500 miles of the project
scenarios. In the low-cost cases, it is assumed that
site.
the cast-in-place concrete, precast concrete, and
concrete masonry are all produced from regionally
(1 point)
extracted materials and that no cost premium
applies.
Cost Impact = 2
In the high-cost scenarios, the credit is purposely
considered unattainable. This reflects situations
where materials such as Portland cement are not
1
2
3
4
5
regionally extracted, thereby preventing concrete
and concrete masonry from being used to achieve
GSA
No
Low
Moderate
High
the credit.
Standard
premium,
premium
premium
premium
(no cost)
psble svgs
(<50K)
(50-150K)
(>150K)
Office Building
Practical Applications
In the Office Building model, different calculations
are used for the "minimal faade renovation" and
As with Credit MR 5.1 (Regional Materials, 20
"full faade renovation" scenarios. In the minimum
percent manufactured regionally), the focus of this
faade renovation, which is almost exclusively
credit will typically be a limited group of "big
interior construction, it is assumed that the gypsum
ticket" construction materials. The most likely
wallboard, acoustical ceiling tiles, and porcelain
candidates include:
tiles are produced from regionally extracted
materials. No cost premium applies in this
Cast-in-place concrete
scenario.1
Structural steel
In the full faade renovation scenarios, the raw
Stone
materials for the concrete in the new exterior
Brick
precast concrete panels are assumed to be
Precast concrete panels
Concrete masonry units
Gypsum wallboard
Premiums have already been accounted for in Credit
1
MR-5.1 to obtain acoustical ceiling tiles and porcelain
Acoustical ceiling tiles
tiles from regional manufacturers.
GSA LEED COST STUDY
123
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