ERA Analysis of Berkeley Labs Roof Study (Full Analysis)

The EPDM Roofing Association (ERA) is challenging a study released by the Lawrence Berkeley National Laboratory, which cites white roofs as the most “cost-effective” roofing option over a 50-year time span. The study, published in the March, 2014, issue of Energy and Buildings, also calls for the phasing out of black roofs. To help provide… Read More

PNAS: Urban adaptation can roll back warming of emerging megapolitan regions

Urban areas are hot spots that drive multisector environmental change (1, 2). Consumption and production of resources for use within urban environments have local and remote implications for ecosystem services, hydroclimate, energy provision, health, and other factors of human wellbeing (1, 3). In semiarid regions, continued conversion of existing lands to urban landscapes has the… Read More

LBNL: Comparison of White, Green, and Black Flat Roofs

Lawrence Berkeley National Laboratory has released a study titled: “Economic Comparison of White, Green, and Black Flat Roofs in the United States.” The EPDM Roofing Association is challenging this study. To help provide clarity regarding roofing system choice, and to refute some of the more egregious errors in the study, ERA convened a panel of… Read More

Construction Specifier: Evaluating effectiveness of white roofs in northern climates

Rethinking Cool Roofing: Evaluating effectiveness of white roofs in northern climates Construction Specifier Craig A. Tyler Article The use of white, reflective roofing materials throughout the United States has grown in popularity in recent years, but are these assemblies really ideal for all locations? When specifying roofing material color for a northern climate, it is… Read More

Professional Roofing: The Un-Cool Consequences of Cool Roofing

During the past 15 years, reflective, or “cool,” roofs have been promoted as an effective way for building owners to save energy and lower utility costs while reducing a building’s carbon footprint. The belief white roofs always are the most environmentally friendly and energy-efficient choice is widely accepted. However, cool roofs are not a quick… Read More

RCI: Condensation Risk of Mechanically Attached Roof Systems in Cold-Climate Zones

“Flat roofs generally have a high potential of nightly overcooling and, therefore, an increased risk of condensation within the construction, particularly in cold-climate zones, depending on their specific assembly. A white exterior surface or so-called “cool roof,” applied to decrease cooling loads and to save energy, increases the condensation risk due to lower energy gains… Read More

SPRI: Room Membrane Color and Moisture Accumulation

“When designing a roof system membrane color, in addition to other variables such as building conditions, insulation levels and local weather conditions must be considered in order to prevent moisture condensation and subsequent accumulation within the assembly.” Author: Mike Ennis Source: SPRI

Phys.org: Researchers emphasize evaluation of tradeoffs in battling urban heat island

A team of researchers from Arizona State University have found that warming resulting from megapolitan expansion is seasonally dependent, with greatest warming occurring during summer and least during winter. Among the most practical ways to combat urbanization-induced warming – the painting of building’s roofs white – was found to disrupt regional hydroclimate, highlighting the need… Read More

Seasonal hydroclimatic impacts of Sun Corridor expansion

Although an overall world population increase of 2.3 billion is projected by 2050 relative to 2011, urban growth is estimated at 2.6 billion, as urban complexes, in addition to absorbing all of the world’s additional inhabitants, are expected to draw in 0.3 billion rural residents [1]. To meet the ever-increasing population-driven demand of urban infrastructure… Read More

Professional Roofing: Paint ‘em White???

“More roof insulation generally is a good thing but there is a point of diminishing returns. Rooftop Solar systems generally are good things provided they meet mind and fire requirements and are installed to protect the roof systems integrity. And yes, reflective roof surfaces generally are good things– but not ones coated with “paint” without… Read More