Norways Finna Slate is a natural stone material that is typically used for roofing and cladding applications. It is known for its durability and resistance to harsh weather conditions. While it is suitable for various climates, including cold and wet environments, its performance in very humid climates may depend on specific conditions.

In general, natural slate is highly resistant to moisture, making it suitable for exterior applications in humid climates. However, it is important to note that proper installation and maintenance are essential to ensure its long-term performance. Adequate waterproofing and proper ventilation systems should be considered to prevent any moisture-related issues.

Additionally, it is advisable to consult with local experts or slate suppliers in the specific humid climate youre referring to, as they will have experience and knowledge about the performance of Norways Finna Slate in that particular region. They can provide guidance on whether this material is suitable for your specific project and offer any specific recommendations for installation and maintenance.