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Roofing technology developed in Germany
is starting to take root in North America
By Nancy B. Solomon, AIA
AIA/Architectural Record Continuing
Education
Instructions
Questions:
LU: 1 HS: 1
1. Vegetation and soil protect rooftops
from all except which type of damage?
a. UV radiation
b. water
c. thermal shock
d. punctures
2. The roof membrane’s life expectancy
changes in which way due to vegetation?
a. it lasts 5 years less
b. there is no change
c. it lasts 10 years longer
d. it is expected to last 20 or more years longer
3. The most critical layer of a green
roof is which?
a. soil layer
b. waterproof membrane
c. vegetation
d. filtered drainage
4. When is a root barrier specified?
a. when tall plants are used
b. when low-growing vegetation is used
c. when the drainage system is specified
d. when the soil layer is shallow
5. A drainage system is required to
handle which?
a. daily watering
b. recycled water
c. excess water
d. stored water
6. Extensive green-roof systems can
be described by all except which?
a. shallow soil bed
b. requires regular maintenance
c. supports low-growing vegetation
d. lightweight
7. Intensive green-roof systems can
be described by all except which?
a. gardenlike atmosphere
b. deep soil bed
c. need structural support
d. economical green roofs
8. The type of plants best suited
for rooftops is which?
a. roses
b. native plants
c. succulents
d. shade-loving plants
9. The environmental benefits of green
roofs include all except which?
a. storm-water management
b. cooling the ambient air
c. releasing nitrogen into the drainage water
d. providing a habitat for insects and birds
10. Green roofs are encouraged in
Germany by which means?
a. some jurisdictions offset cost by tax incentives
b. required by a constitutional amendment
c. cost of plants is subsidized by government
d. labor is provided by the government
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