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
Energy | Jul 25, 2016
Michigan law provides local governments with flexible energy conservation financing
Allows cities to fund projects without adding debt.
Contractors | Jul 15, 2016
Trade unions, contractors call for maximum penalty in construction worker death case
‘Sick and tired’ of lawbreaking contractors defining public perception.
Multifamily Housing | Jul 14, 2016
Portland, Ore., City Council approves construction excise tax for affordable housing
Expected to raise $8 million annually on commercial and residential projects.
Drones | Jul 13, 2016
FAA issues final rule on commercial use of drones
The rule covers commercial uses for drones that weigh less than 55 pounds, and it takes effect Aug. 29.
Codes and Standards | Jul 12, 2016
OSHA raises maximum civil penalties by 78%
Applies to infractions that occurred after Nov. 2, 2015.
School Construction | Jul 11, 2016
Fight over school funding in Arizona headed to court
Legislature accused of ignoring 1994 ruling ordering state to pick up some of the costs.
Green Specifications | Jul 8, 2016
World Green Building Council sets goal of 100% net-zero buildings by 2050
All new buildings and major renovations to be net-zero by 2030.
Market Data | Jul 7, 2016
Airbnb alleged to worsen housing crunch in New York City
Allegedly removing thousands of housing units from market, driving up rents.
Urban Planning | Jul 7, 2016
Y Combinator project would build new city using new technology, urban policies
Zoning, property rights, building codes all could be re-imagined.
Green | Jul 6, 2016
U.S. healthcare system’s GHG emissions rise 30% in past decade
If U.S. healthcare were a country, it would rank 13th in GHG emissions.