Brazils Black Tremendal Quartzite is a natural stone known for its durability and beauty, making it suitable for a variety of applications, including exterior use. However, when considering its use in cold climates, a few factors should be taken into account.

1. Freeze-thaw cycles: In cold climates, the repeated freezing and thawing of water can cause damage to some materials. Quartzite is generally a dense and durable stone, which can withstand freeze-thaw cycles better than many other types of natural stone. However, it is recommended to ensure that the quartzite is of high quality and has low water absorption to minimize the risk of damage.

2. Thermal expansion: Extreme temperature fluctuations in cold climates can cause materials to expand and contract. While quartzite is less prone to this compared to other stones like marble or limestone, it is still advisable to use proper installation techniques and allow for expansion joints to accommodate for any potential movement.

3. Slip resistance: In cold climates, the presence of ice and snow may increase the risk of slipping. It is important to choose a finish for the quartzite that provides adequate slip resistance, especially for exterior surfaces. Honed or textured finishes are generally more slip-resistant than polished finishes.

4. Maintenance: Regular cleaning and maintenance are essential for the longevity of any material used in exterior applications, including in cold climates. Harsh winter conditions like ice melt chemicals and salts used on roads and walkways can potentially cause staining or damage. It is important to promptly clean any spills and regularly seal the quartzite to protect it from such substances.

Overall, with proper installation, maintenance, and consideration of factors such as freeze-thaw cycles, thermal expansion, slip resistance, and sealing, Brazils Black Tremendal Quartzite can be used successfully in exterior applications in cold climates. However, it is always recommended to consult with a professional architect or contractor to ensure the suitability of the stone for specific climate conditions and to follow proper installation and maintenance guidelines.