A stone coating with a metallic roof lessens some audio frequency, but some noise can continue to be listened to when it rains or hails intensely. The stones in DECRA’s stone-coated steel roofing products are referred to as roofing granules. The granules are manufactured from pure stone which was mined https://stone-coated-roof-tiles43218.gigswiki.com/4832588/little_known_facts_about_stone_coated_roof_tiles