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Architecture Building Material Samples

Resources related to architecture, landscape architecture, and urban planning building materials.

Green Roofs: The Basics

Basics of Green Roofs: A Guide from the Building Material Samples Collection
Overview of covered including benefits, types of green roofs, examples of green roofs, systems and components, maintenance and cost, additional resources
Additional benefits of green roofs include improved longevity, improved air quality of roofing membrane, increased insulation from heat, cold, and sound
Two main types: extensive and intensive. Extensive are 2 to 6 inch depth of soil, 10 to 35 pounds per sq foot, Drought tolerant sedums and grasses Plant diversity kept at a minimum. Intensive are > 6 inch soil depth Up to 150 pounds per sq foot Grasses, flowers, shrubs, and trees
Green roof examples: Maggie Daly Park, Chicago Illinois. Serves as one of the most ambitious examples of a green roof: Over 20 acre Intensive roof with large trees, bushes, grass, and flowers, Play garden, Rock wall, Ice skating in winter; roller skating in summer
Green roof examples: Smaller-scale recreation areas are also possible such as this extensive green roof in the form of a golf hole in Montreal
Green roof examples: This extensive roof serves as a spot to socialize and relax and is found in Mississippi
Green roof examples: This intensive roof in London serves as a popular meeting place
Green roof examples: This extensive roof in California adds to the aesthetic appeal of the building as well as providing functional benefits
Forms: Two main form factors:  Traditional or “built-in-place”: each layer is installed one on top of another  Containerized, modular, or tray: arrives pre-vegetated in trays and is laid into place and locked together
Maintenance and cost considerations: Increased weight relative to standard roofing options Building must be designed to account for extra weight of green roof Retrofits are possible in some cases but are relatively rare More expensive than a traditional roof Irrigation and regular fertilization treatments typically required Weeding needed Can make repair of roofing more challenging if leaks develop
Want to see models of each type of green roof and additional information about green roofs? Visit the Building Material Samples Collection when we return to campus!
Bradley Johnston Curator Visual Resources Collection Architecture Library  bcjohnston@bsu.edu  765-285-5865

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