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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

• Read the article "Vegetation Systems Atop Buildings Yield Multiple Environmental Benefits."
• Complete the questions below, then fill in your answers .
• Fill out and submit the AIA/CES education reporting form in the magazine or print the form to receive one AIA learning unit.

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

Click here to print the reporting form.