 Well, the summer season, with its intense heat, can be really rough on your roof. Now, the intense UV radiation, that can dry out your roof to a point where it's going to lose all of its flexibility. And when that happens, shingles can dry out, they'll crack, and then they lose their water resistance. Now, this is especially true today because most shingles have less asphalt in them than ever before, which means that they're going to dry out all the much faster. And when that happens, the shingles are going to need to be replaced, and that can be pretty expensive.