Cool pavements—reflective coatings or additives applied to concrete and asphalt—could have an unfortunate byproduct.
New research conducted in Los Angeles’ San Fernando Valley examined the impact of pavements that had been mixed with a reflective additive. The finding: reflected energy from sunlight can make people walking on the pavement significantly hotter.
According to a researcher’s sensors, on a hot, dry day, a pedestrian could feel more than 7 degrees warmer on a “cool pavement,” compared to how he or she would feel on a standard blacktop. The standard dark pavement stores some of the energy and converts it into heat, while the cool pavement reflects more energy.
Studies support the notion that reflective surfaces can reduce the heat island effect by a few degrees in urban areas, but at least in the brightest times of the day, they can make people walking on them feel hotter. Since 2015, Los Angeles has covered about 50 city blocks in reflective coatings and seals, and plans to continue with this initiative.
Related Stories
Codes and Standards | Jun 18, 2015
New document addresses school safety and security
In an effort to balance security and fire safety features within codes, standards and planning, NFPA hosted a two-day workshop, “School Safety, Codes and Security”, last December. The findings are now available in an NFPA report.
Codes and Standards | Jun 18, 2015
Two myths regarding NFPA 101 Life Safety Code debunked
NFPA life safety engineer Ron Coté settles the debate over second egress doors and exit signs.
Codes and Standards | Jun 18, 2015
How to prevent corrosion in sprinkler system piping
The technical committees responsible for NFPA 13, Installation of Sprinkler Systems, have been looking at ways to eliminate or reduce corrosion in sprinkler systems for several revision cycles.
Codes and Standards | Jun 11, 2015
Steel Framing Alliance updates ‘Thermal Design and Code Compliance for Cold-Formed Steel Walls’ design guide
Includes results of new tests and addresses IECC and ASHRAE compliance paths.
Codes and Standards | Jun 11, 2015
Helena, Mont., may charge commercial developers a fee to fund public art
The fee would apply to new construction or alteration of nonresidential buildings of at least 20,000 sf.
Codes and Standards | Jun 11, 2015
DBIA releases new document on choosing a project delivery method
Provides owners and others with factors to consider when choosing the best method of delivery for their project.
High-rise Construction | Jun 5, 2015
Japanese policymakers discuss mandate for toilets in elevators
This quirky-sounding building code is a safety measure for the earthquake-prone nation.
Codes and Standards | Jun 4, 2015
OSHA publishes guide to restroom access for transgender workers
The guide advises employers to allow employees to use restrooms that correspond to their gender identity.
Codes and Standards | Jun 4, 2015
Guide helps Building Teams maximize team integration
The guide includes forms to support a two- to four-hour workshop to help an owner select the most appropriate delivery strategy.
Codes and Standards | Jun 4, 2015
NIBS, RICS to explore P3 as tool to achieve high-performance buildings
The idea of applying the P3 concept more to buildings, and especially building performance, is a potentially promising new avenue in the U.S., according to the trade groups.
