Natural slate
HISTORY
Natural slate is a fine-grained, sedimentary metamorphic rock that has been used as a building material since Roman times.
The geological formation process of natural slate took place during the Paleozoic era, spanning from the mid-Ordovician to the mid-Devonian period. Spanish slate, in particular, was formed in the middle of the Ordovician period (475-450 million years ago).
There is no other roofing material like slate. It is able to withstand extreme temperatures, it hinders the formation of snow, it is completely waterproof and it has an A1 fire rating.
If you are thinking of a long-term, maintenance-free roof, natural slate is the right choice, as other man-made products are more prone to discolouration, disintegration or lichen growth.