The use of Slovakias Breccia Blue Conglomerate in exterior applications in very rainy climates can be a subject of debate. Breccia Blue Conglomerate is a sedimentary rock that consists of various sized fragments cemented together.

It is generally considered a durable and weather-resistant material, making it suitable for outdoor use. However, its specific performance in rainy climates depends on several factors, including the quality of the stone, the installation method, and the degree of exposure to moisture.

In very rainy climates, excessive moisture can pose some potential issues. For instance, prolonged exposure to moisture can cause the stone to absorb water, leading to staining, discoloration, or even deterioration over time. It may also increase the risk of freeze-thaw cycles, where water freezes within the stone and causes it to crack or spall.

To ensure the optimal performance of Breccia Blue Conglomerate in a rainy climate, it is recommended to take certain precautions. These may include:
1. Choosing a high-quality stone with low porosity and good resistance to water absorption.
2. Properly sealing the stone surface with a high-quality waterproof sealant to prevent water penetration.
3. Regular maintenance and cleaning to remove any accumulated moisture or algae that can accelerate weathering.
4. Adequate installation techniques, such as employing suitable drainage measures to avoid stagnant water pooling around the stone.

Consulting with a professional stonemason or architect experienced in working with Breccia Blue Conglomerate can provide further guidance on its suitability for specific projects and climates.