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NATURAL
T1
RURAL
T2
SUB-URBAN
T3
GeNeRAL
URBAN
T4
URBAN
CeNTeR
T5
URBAN
CORe
T6
Light imprint handbook version 1.3
FILTRATIO
N
F37
Green Roof
X. Green Roof
t-Zones: t2, t3, t4, t5, t6 slope: steep, moderate, FlatCost : $$$ soils: poor, medium, goodmaintenance: medium Climate: Cold, temperate, hot dry, moderately Wet, Wet
A. Descriptionstructures with green roofs visually enhance communities with
plantings above the street level. they are a viable stormwater management tool that captures rainfall in typically impervious areas. The building produces less sheet flow to be managed at ground level. in addition, they can provide food for the community, temperature control, architectural enhancement, and recreation.
B. Use because a green roof is an addition to an individual building,
it is appropriate for use in t2, t3, t4, t5, and t6 transect zones. A roof garden may be planted on a flat roof or a roof with a low pitch. Roof gardens can use atypical gardening techniques, such as hydroponics. this can make roof gardens produce more plenti-ful crops.
C. Maintenancethe upkeep for a green roof is similar to that of a normal
garden and includes seasonal maintenance. plant selection must ensure that species selected are appropriate for the climate.
D. Costthe cost of a green roof is higher than the average cost of
a roof. The structure requires additional support for the weight of vegetation and soils. the roof membrane must be waterproof to ensure that no water leaks into the structure.
e. Resourcesnate berg. “top down greening in the Urban Core.” planetizen. (26 July 2006). <http://www.planetizen.com/node/20612>U.s. environmental protection agency. ”green roofs” (Washington,
dC: Usepa, heat island effect, oct. 2007). < http://www.epa.gov/heatisland/strategies/greenroofs.html>
NATURAL
T1
RURAL
T2
SUB-URBAN
T3
GeNeRAL
URBAN
T4
URBAN
CeNTeR
T5
URBAN
CORe
T6
Light imprint handbook version 1.3
FILTRATIO
N
F38
t4 - green roof - orlando, FL
Green Roof
t4 - green roof - portland, or
NATURAL
T1
RURAL
T2
SUB-URBAN
T3
GeNeRAL
URBAN
T4
URBAN
CeNTeR
T5
URBAN
CORe
T6
Light imprint handbook version 1.3
FILTRATIO
N
F39
Green Roof
t3 - green roof - Findhorn, scotland
