Your roof absorbs most of the sun’s heat during the day, and this ends up heating your home, leading to higher cooling costs. To combat this effect, there is an invention called cool roofing. Cool roofing is made from a material that reflects heat, staying relatively cool compared to other roofing materials.
In some areas, this could mean a saving of about 50 cents for each square foot of roofing.
You can buy cool roofing material if you are going to replace your roof, but if not, there is also the option of attaching a thin membrane on top of your existing roofing material, turning it into a cool roof.
While this material does cost extra, over time the cost will be offset by the savings in energy cost.
Cool roofs also have a longer life expectancy, since sunlight will deteriorate most other roofing materials.
A downside with cool roofing is that you will not benefit from the sunshine in the wintertime, so this could mean a higher heating bill instead.