What is slate?
Is believed that the word “slate” comes from the Old French word scalar meaning fragment, from the verb slater, to shatter.
Slate is derived from fine-grained sediments such as mud or occasionally volcanic ash laid down millions of years ago in layers known as bedding. As the pile of sediments thickened, the original open structure of the mud was compacted into a mudstone or shale.
These rocks are easily split on the bedding planes and are referred to as flagstones. However, for a slate to form, subsequent intense geological forces associated with mountain building are required, during which the minerals present in the original mudstone are metamorphosed.
Slate as a roofing product is today unbeatable, from both a performance perspective and lasting aesthetics.
It is a natural material extracted directly from deposits with the utmost care to respect its properties as much as possible.
The only process that the raw material goes through is cutting which necessary to adapt it to the commercial format. It does not need any further treatment.