Slate can be glued on concrete both indoors and outdoors, e.g. on terraces. Slate can be laid directly on pedestals (without glue/ joints) in an outdoor area/terrace. Outdoor areas in the garden can be made using slate laid in gravel on a surface that is stable and frost-free. Slate slabs can be laid directly in the lawn with a layer of gravel underneath. See our films and installation instructions for how to shape and install slate.