Q. I’ve heard that simply painting your roof white can reduce household electricity bills by 40 percent. Is this something any of us can do?
Yes, anyone can do it. The benefits can be significant, especially for those in warmer climates who expend a lot of energy keeping cool.
A black roof exposed to full sun can increase in temperature by as much as 90 degrees Fahrenheit.
A white or reflective roof typically increases temperatures 10 to 25 degrees above ambient air temperatures during the day. This translates to savings of up to 15 percent on energy use for air conditioning over a year for a typical one-story residence, according to the U.S. Department of Energy.