At first, these fibers have been asbestos, but fiber cement shingles nowadays are made with cellulose and synthetic fibers. Hanging a pot rack in the ceiling isn't the very best Do-it-yourself undertaking for newbies, but seasoned DIYers will know they first have to ensure you drill into the ceiling joists. https://nearfinderus.com/en/business/il/yorkville/category_roofing-contractors/advanced-roofing-inc_21897207+0.html