Most urban infrastructure was not designed for shorter duration storms that yield torrential downpours. Hard surfaces including roofs cause stormwater to pool rapidly, creating floods. Green roofs can mitigate some of this effect, and a similar approach known as “blue roofs” can accomplish the same without using vegetation.
A blue roof system stores rainwater and slowly releases it using flow-control devices or structures including customized trays and existing building risers that cause water to dam up. Together, they collect and then slowly release rainwater, allowing municipal drains and stormwater piping to keep up with heavy volume pressure.
Blue roofs typically retain more water than green roofs and are particularly beneficial in commercial/industrial zones. Stored water also provides buildings with a cooling effect through evaporation, and the collected water can be made available for reuse.
Related Stories
Codes and Standards | Aug 16, 2018
Nearly a quarter of opioid overdose deaths attributable to construction workers
Massachusetts public health study finds pressure to work in pain contributes to problem.
Codes and Standards | Aug 15, 2018
ICC creates new committee on building safety and security
Will include experts from many different disciplines.
Codes and Standards | Aug 14, 2018
Philadelphia adopts 2018 IECC energy code, while state opts for 2015 code
City is one of the first jurisdictions to adopt newest code.
Codes and Standards | Aug 9, 2018
Denver’s goal of 100% renewable energy by 2030 includes net zero energy buildings
Community solar programs for low income residents part of plan.
Codes and Standards | Aug 8, 2018
Too much parking in U.S. cities proving costly
As car ownership rates drop, excess parking seems more wasteful.
Codes and Standards | Aug 7, 2018
International Fire Safety Standards (IFSS) Coalition created
Professional associations and building standards organizations join forces.
Codes and Standards | Jul 31, 2018
Workers allegedly held in captivity by construction subcontractor in San Jose pay theft case
Contractor pays $250,000 in back wages in Dept. of Labor enforcement action.
Codes and Standards | Jul 17, 2018
Heat island effect can turn deadly in extreme conditions
Of all the impacts of global climate change, it’s extreme heat that kills more Americans each year than any other weather-related event.
Codes and Standards | Jul 17, 2018
NIMBYism, generational divide threaten plan for net-zero village in St. Paul, Minn.
The ambitious redevelopment proposal for a former Ford automotive plant creates tension.
Codes and Standards | Jul 17, 2018
In many markets, green features are more of a requirement for apartment renters
Renters in many U.S. cities have come to expect green features in apartments that they rent, with an eye toward energy efficiency and healthy indoor air.
