Slate, considered to be a noble material, is a natural material requiring no specific treatment apart from its extraction and cutting. A metamorphic rock and part of the schist family, slate is reputed for its fine grain and its resistance to bad weather and all climate variations. Furthermore, slate has the advantage of being solid, long-lasting and impermeable. The colour of slate varies depending on its mineral composition and mineral grain size. It can be sparkling white or ebony black, not to mention a thousand shades of grey in between. Thanks to its resistance and impermeability, slate is an excellent material for roofing. Slate is indeed one of the most used and most suitable materials for roofs. It can last up to 80 years or more, depending on the quality of the deposit, the extraction method used and the selected thickness. Slate can bring or add a touch of shine and warmth to an interior design and remains the ultimate preferred material thanks to its texture and its range of natural colours. The many interior designers who have worked with slate have managed to create an extraordinary new look for their piece. This multi-purpose material can be integrated into a wide range of designs, whether for tiling, wall coverings, floor coverings or flat surfaces. When used in kitchens and bathrooms, slate ensures an extremely original and highly fashionable style for working surfaces, sinks and credence tables, wall coatings and even chimneys. Slate is also marvellous when sculpted or etched in in the creation of commemorative or decorative plates. Slate is also used to create slabs and was long used for chalkboards. It is also worth noting that slate is often required when producing billiard tables, due to its density and mass which prevent rapid deformation. The use of slate brings many wide-ranging benefits. In addition to being both useful and pleasant to work with, by combining aesthetics with longevity, slate requires practically no specific care or upkeep. When used for roofing, slate also prevents the formation of moss. Slate’s qualification as an irreplaceable material is thus no exaggeration! However, the use of slate can present some inconveniences. For example, slates containing iron are more vulnerable to rust and the cost of natural slate can represent an obstacle to its use in some projects. It was indeed this factor which led to the appearance of new synthetic construction materials, which are cheaper and can be made to have the appearance of slate.