China Blue Limestone can be used for exterior applications in cold climates, but it is important to consider a few factors.

Firstly, China Blue Limestone is a natural stone with a high density and low water absorption rate, which makes it resistant to freezing and thawing cycles. This means it can withstand the expansion and contraction that occurs due to temperature changes without cracking or deteriorating.

However, it is essential to choose the right type and finish of China Blue Limestone for cold climates. Some types may be more suitable than others. Additionally, a proper installation method is crucial to ensure the stone is properly sealed and protected from moisture penetration.

It is also worth noting that any exterior stone surface in cold climates will require regular maintenance to keep it in good condition. This may include sealing the stone periodically to prevent water infiltration and the formation of ice.

Overall, China Blue Limestone can be used in exterior applications in cold climates, but attention should be given to the specific variety, finish, and installation techniques to ensure its suitability and longevity. Consulting with a professional stone supplier or installer can provide more specific advice based on your particular climate and project needs.