Roofing slabs are materials used to cover the roof of a building. SLATE and TILE are two common materials used for roofing slabs. SLATE is a type of fine-grained metamorphic rock that is usually gray in color and can be split into thin, flat pieces. TILE is a manufactured piece of hard-wearing material, such as ceramic or stone, which is used for covering roofs, floors, and walls. Both SLATE and TILE are durable and long-lasting materials that can be used for roofing slabs.