Why put stones on top of rubber flat roof?

There area variety of reasons for putting a layer of small stones, or gravel, on top of a flat rubber roof. The gravel's primary purpose is to protect the rubber layer from the sun, hail, and other harmful elements. The gravel also helps prevent the rubber from softening and flowing to the lowest point on the roof in the hot, summer months. You can compare different types of roofing material <a class="url" target="_blank" rel="nofollow noreferrer" href="/to/?target=http://www.centuryspouting.com/roofing/">here</a> for additional information.