A roof piece is an essential component of a building's structure, and it can be made from a variety of materials. The two crossword solutions for the term 'roof piece' are TILE (4 letters) and EPI (3 letters). TILE is a type of material used to make roof pieces, and it is typically made from ceramic or stone. EPI stands for Expanded Polystyrene Insulation, which is a type of insulation used to protect roof pieces from the elements.