Pietra Grey Ceramic can be used for exterior applications in very humid climates, but it is important to ensure that the ceramic tile is suitable for outdoor use. Some ceramic tiles may not be designed to withstand the harsh conditions of outdoor environments, such as constant exposure to moisture, temperature fluctuations, and UV rays.

To ensure the suitability of Pietra Grey Ceramic for exterior use in very humid climates, it is recommended to choose a tile that is specifically designed for outdoor applications. Look for characteristics such as high porosity, resistance to water absorption, and freeze-thaw resistance. These features will help the ceramic tile withstand the challenges posed by humid and outdoor environments.

It is also recommended to consult with a professional tile installer or supplier who can provide specific recommendations based on your climate and local conditions. They can advise on the best products and installation methods for your specific needs.