Denver voters passed one of the strictest green roof mandates of any city in the world earlier this month.
Initiative 300, passed with about 54% of votes cast, creates a new building code that requires vegetative roof systems or solar panels for most buildings 25,000 sf or larger constructed after Jan. 1, 2018. The measure is more stringent than other green roof codes because it also requires many existing buildings to be retrofitted with green roofs when a roof needs replacement.
Older buildings that cannot support the load of a vegetative roof can get an exemption. The measure is intended to help keep the outdoor air cooler, reduce stormwater runoff, reduce the amount of energy consumed by air conditioners, and, in the case of PVs, generate clean energy.
Opponents of the referendum were concerned that it would be costly and hurt nonprofits and affordable housing programs. Advocates conceded that green roofs cost more, but argued that they would pay for themselves in about six years.
Related Stories
Sponsored | BD+C University Course | Feb 17, 2022
Metal roofing trends
New ideas in design and constructability are radically changing how metal systems are used as roofing for commercial and institutional buildings. Behind the investment in these new kinds of expressions and construction approaches is a growing interest in improved performance and reduced environmental impact. Metal roofing systems can cut cooling and heating loads significantly, according to the EPA.
Codes and Standards | Feb 17, 2022
Pandemic won’t alter urban planning
City planners focused on returning to ‘old normal’.
Codes and Standards | Feb 16, 2022
California court rules affordable housing developers exempt from local zoning
Case could set precedent on state law that overrides local rules.
Codes and Standards | Feb 15, 2022
FORTIFIED resiliency standard expanded to include multifamily sector
Voluntary, beyond-code program aims to protect buildings from severe weather.
Codes and Standards | Feb 10, 2022
Number of Americans at risk of flooding to double in 30 years
Most new risk from new development, not climate change.
Codes and Standards | Feb 10, 2022
Intl. Code Council committee on diversity seeks applicants
New board aims to increase diversity in the membership association.
Codes and Standards | Feb 9, 2022
Climate impact of gas stoves in U.S. equal to half a million cars
New study could increase momentum to ban fossil fuels in new buildings.
Codes and Standards | Feb 7, 2022
Energy efficiency ratings not reflecting true energy use
Highest rated U.K. buildings are less efficient than lower rated ones.
Codes and Standards | Feb 3, 2022
Illinois tops USGBC list of states with the most LEED certified projects in 2021
Top 10 states plus D.C. certified more than 247 million gross square feet.
Codes and Standards | Feb 2, 2022
Public works contracting reform advances in New York State
Governor signs bill to form advisory council that will propose policy changes.