Of physics, the roofing

Why rubber paint is a great choice? The roof under the influence of sunlight can be greatly heated, especially in the middle of summer. And this, as you know, leads to the fact that the material will expand. In other words, according to all the laws of physics, the roofing material from heating will increase slightly in size. In winter, at a low temperature, the reverse process will occur, that is, the roofing material can slightly decrease in size.