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I wonder if anybody has tried using mirrors instead of white paint for cool roofs. I also wonder if some arrangement of perfect mirrors could act as a sort of

• nordsieck 5y ago
  > I wonder if anybody has tried using mirrors instead of white paint for cool roofs. From rockets, the reason white paint is often higher performance is that, while it has lower reflectivity than a mirrored surface, it has higher emissivity. Between the performance, the lower cost of white paint as opposed to a mirror finish, and the curb appeal, I doubt more than a few people have clad their house in mirrors. > I also wonder if some arrangement of perfect mirrors could act as a sort of light storage mechanism (battery) I don't know, but I suspect that mirrors just aren't reflective enough for this to be practical.