Our house is around 50 years old and has dark concrete roof tiles that have never been painted. I am wondering whether it is a good idea to paint them in white or a light color to deflect sunlight and hopefully keep the house cooler in summer. I have heard many different, sometimes conflicting, opinions about this.
I had dark concrete tiles on my Florida roof. The paint eventually washed off after being power washed many times. I painted the tiles in a much lighter color and noticed my AC running less and the attic cooler. An additional advantage was lowering the heat on the roofing material below the tiles to slow down drying and cracking.