Calacatta Ivory Porcelain is typically designed and recommended for indoor use. Porcelain tiles, in general, have a low water absorption rate, which makes them more resistant to moisture and less likely to crack or expand when exposed to water. However, certain factors such as freezing temperatures, extreme weather conditions, and constant exposure to sunlight can adversely affect the durability and appearance of porcelain tiles when used outdoors. Therefore, it is not ideal to use Calacatta Ivory Porcelain outdoors unless it is specifically labeled as suitable for outdoor use by the manufacturer. It is always recommended to consult with the manufacturer or a tile professional to determine the suitability of a particular porcelain tile for outdoor applications.