Section 3: Synergistic Credits
Basis for Cost Assumption
Office Building: Credit SN-3
In order to achieve the 50 percent certified wood
criteria of credit MR-7, the majority of the solid
Combines:
core, non-rated wood doors in the closed office
Credit MR-7
areas are targeted. These doors are assumed to be
solid stave-core, FSC-certified doors with an
Certified Wood
additional premium paid to use non-urea
Credit EQ-4.4
formaldehyde crossbanding layers. Additional
Low-Emitting Materials: Composite Wood
wood doors (that are not FSC-certified) are
specified with formaldehyde-free cores and
crossbanding layers (see credit EQ-4.4). All
casework substrates are assumed to be a wood-
Description
based mdf that is not certified, but is free of urea
formaldehyde binders.
Credit SN-3 reflects the cost synergies, and
potential product purchasing complications, that
Table SN3O-1 lists all of the wood items required
can arise when projects simultaneously pursue
to achieve the credits.
credit MR-7 (at least 50 percent of wood-based
Summary of First Cost Impacts
materials are certified using Forest Stewardship
Council [FSC] criteria) and credit EQ-4.4
(composite wood and agrifiber products contain
no added urea formaldehyde resins). The
Individual Credit Costs
synergistic credit reflects the specific impacts of
the two credit requirements on wood doors in the
Credit MR-7................................................. ,332
Office Building model.
Credit EQ-4.4.............................................. ,429
For wood doors to earn FSC certification, at least
Synergistic Credit SN-3
70 percent (by weight) of the door must consist of
certified wood material. This typically means that
FSC certified doors will have stave-cores instead of
Total Credit Cost ...................................... 4,572
particleboard cores. In addition, to meet the EQ-
Cost Impact ($/GSF)...........................
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.41/GSF4.4 criteria, all other engineered wood components
Cost Impact (%), Min. Facade.....................0.32%
in the doors (potentially frames, rails, stiles, or
Cost Impact (%), Full Facade......................0.31%
crossbanding layers, depending on the product and
manufacturer) cannot contain urea formaldehyde
Applicable Scenarios
resins. Currently, a limited number of
manufacturers offer both the certified wood and
formaldehyde-free options.
Credit SN-3 is used in the Office Building
scenarios 1B/Minimal Facade Renovation
Two LEED credits are earned by implementing
(Certified) and 2B/Full Faade Renovation
the measures in item SN-3.
(Certified).
GSA LEED COST STUDY
178
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