Freeze Thaw Resistant
In many climates, the day is warm but night temperatures can drop below freezing. In such climates, snow can melt during the day and water can seep in between layers of slate.
Then, when the temperature drops at night, the water expands, opening up the slate layers and deteriorating the slate. When selecting slate for your outdoor space, keep in mind that not all slates
are freeze/thaw resistant.