I dont have information about the specific use of Norways Lace Rust Phyllite outdoors. However, as a general rule, phyllite is a type of metamorphic rock that is typically used for indoor applications such as flooring, walls, and countertops. Its texture and durability make it great for high-traffic areas. It is not recommended to use phyllite outdoors due to its tendency to absorb water, which can cause it to crack if exposed to extremely cold temperatures.