Cornish Slate Antique Promenade Tile (297mm x 297mm x 25mm) These natural dark Cornish slate Antique Promenade Tiles designed with eurodec’s high quality attention to detail, offer a protective and attractive finish for waterproofing substrates such as single plywood, asphalt and bituminous felt covered spaces. Excellent for transforming roof spaces into inviting balconies or stylish roof terraces adding both aesthetic and economical value to your home. Finished in the traditional antique style with a natural beauty which is carefully recreated with tumbled edges and distressed appearance.