Earth Grey Cast Stone can be used for exterior applications in very windy climates. Cast stone is a highly durable material that is designed to withstand various weather conditions, including wind. It is resistant to cracking, chipping, and fading, making it suitable for use in windy areas. However, it is always recommended to consult with the manufacturer or a professional designer/engineer to ensure that the specific product and installation method are appropriate for the conditions of your particular climate.