Stan Graveline of Sika Sarnafil wrote a great piece defending the use of cool roofs in cooler areas of the country. He does a great job laying out the science, as well as the fact that billions of square feet of cool roofs are installed in northern areas and performing well. Check it out at Professional Roofing magazine.
Global Cool Cities Alliance
Advancing efforts that build resilience to rising temperatures…cooling the world's cities with solar reflective urban surfaces is an easy, cost-effective step toward cooling the planet.