Which type of roof is best in cold climates: solar, white or green? : TreeHugger by Greg Lougheed | Apr 9, 2015 | News Which type of roof is best in cold climates: solar, white or green? : TreeHugger. Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Click to email a link to a friend (Opens in new window) Email Click to print (Opens in new window) Print