Page 174 - Green Building Through Integrated Design

150 INTEGRATED PROJECT MANAGEMENT—COST/BENEFIT ANALYSIS OF GREEN BUILDINGS

TABLE 8.2 SUSTAINABLE SITES: CREDIT 6 STORMWATER DESIGN
NON-LEED LEED CREDIT SOLUTION LEED CREDIT SOLUTION
BUILDING #1 BIOSWALES #2 PERVIOUS PAVING
Soft Cost Impacts None Landscape architect None
and civil engineer
collaboration
Hard Cost Impacts None Reduced land 1. Pervious paving
purchase for utilized in lieu of
stormwater mitigation standard asphalt
$150,000 paving + $200,000
2. Reduced land
purchase for
stormwater mitigation
$150,000
Life-Cycle Benefits None Maintenance cost Maintenance cost
reduction $10,000/year reduction $10,000/year

SUSTAINABLE SITES: CREDIT 7.2—HEAT ISLAND EFFECT, ROOF

In mitigating the urban heat island effect, two obvious solutions are to design a
LEED-compliant, high-emissive reflective roof or to install a green roof. Both
alternatives have an up-front design and installation cost (Table 8.3), but the reflec-
tive roof achieves payback in the fifth year, while we have to wait until the ninth
year to get a return on the green roof investment (Fig. 8.2). But, we may not want

Figure 8.2 Cumulative cash flow SS Credit 8.2: Heat Island Effect. Paul Shahriari,
GreenMind Inc.