"A modern green roof involves more than just plants. It needs high-quality waterproofing and protection against root damage, a drainage system, filter cloth, and a lightweight growing medium. The plants may be small, drought-tolerant ones like sedums, or larger grasses. The system can be modular or site-built, and depending on the planting medium depth, may even resemble a natural meadow or a garden with shrubs and trees."
"Project Drawdown ranks green roofs and cool roofs as #73 in their list of solutions to global warming, with an anticipated 0.77 gigaton reduction in carbon dioxide by 2050. If green roofs cover 30% of roof space by 2050 and cool roofs cover 60%, approximately 407 billion square feet of efficient roofing would be in place globally. Despite growing support, several challenges continue to limit widespread implementation."
Toronto passed North America’s first law requiring green roofs on newly constructed buildings in 2009, and the city has since installed 640 green roofs under the bylaw. Green roofs are living roofing systems that support plants and require waterproofing, root protection, drainage, filter cloth, and a lightweight growing medium. Planting can range from drought-tolerant sedums to grasses, shrubs, or trees and systems can be modular or site-built. Project Drawdown ranks green and cool roofs among climate solutions with significant potential CO2 reduction if widely adopted. High initial installation costs, maintenance needs, and structural constraints limit broader implementation.
Read at Earth911
Unable to calculate read time
Collection
[
|
...
]