I wrote an article for Roofing Magazine’s September/October edition that examines some of the new research that is toppling the myth that cool roofs are not suitable in cool climates. You can check it out over at their website. I focus on two studies in the article, but these two are only the latest analyses that indicate that cool roofing should be a considered when putting on new roofs in cold climates and further support the effort to expand cool roof requirements in building codes at least to Climate Zone 4a and 4b. (the yellow zone on the map).
There Is Evidence Cool Roofs Provide Benefits to Buildings in Climate Zones 4 through 8