Valley was developed using his many years of experience as a professional paper artist to re-form a sheet of felt from flat to a three-dimensional form simply by cutting and folding the material. The folding of the tile allows the planes to shift up and down creating a valley between two mountains. Simply by changing their orientation in the grid, you can create an unlimited variety of patterns. Installation types: Drop the tiles into any 9/16” or 15/16” tee-grid. Concealed tile install - tiles fit neatly together edge-to-edge, to conceal the actual grid. 15/16” grid only.