The JI Boréas XLS cassette is a fl at cladding concept with hidden fi xings designed for both new build and renovation. The JI Boréas XLS cassettes are fi xed to a framework that is attached to a steel support, concrete or masonry. This product requires an adjusted or an adjustable framework. They can be installed horizontally or vertically, depending on the desired appearance. The special feature of this cassette is that it is equipped with a self-locking principle, which ensures that the longitudinal joints between the cassettes are always respected. Depending on the desired aesthetic, we can provide the JI Boreas XLS cassette with or without a hollow joint.