The smooth Ardonit slate is perfect for both roof and facade applications and/or a combination of both. The various available formats make it possible to use a range of different installation methods. In addition, the slates are extremely light yet exceptionally strong, making them easy to work with. The coated Ardonit slate has a double coloured and environmentally friendly acrylic coating. Attention: The Ardonit slate in the colour natural grey has no coating.