A backsplash provides two functions. It protects your walls from sudden — but predictable — splashes and ties the entire room design and décor together. Perhaps you don't have a backsplash in your kitchen or bathroom, or your current backsplash needs to be changed. In any case, you're undoubtedly looking for backsplash types and ideas. Unless your backsplash spans the entire length of your kitchen or bathroom wall, it will…