Slate can be made into roofing slates, which are installed by a slater and are a type of roof shingle, or more specifically a type of roof tile. Slate has two lines of breakability: cleavage and grain, which make it possible to split the stone into thin sheets. When broken, slate retains a natural appearance while remaining relatively flat and easy to stack.
Slate is particularly suitable as a roofing material as it has an extremely low water absorption index, less than 0.4%, which makes it resistant to frost damage.
Slate roof tiles are usually fixed either with nails, or with hooks as is common with Spanish slate.