Dear James: The painted walls in my bathroom look too plain. I want to install some tile with a decorative pattern. Is it difficult to make designs and patterns myself? — Mia H. Dear Mia: Adding decorative tile or changing the existing tile pattern can dramatically enhance the entire bathroom. Although it is not difficult to design and install a pattern yourself, there are many existing tile patterns you can find at most home center stores. This makes the tiling project even easier. Your first decision to make even before a pattern design is the tile material. One of the most durable and attractive tile materials is solid-color porcelain tile. The color goes completely through the tile material, so tiny scratches or chips are not very apparent. The tile can handle temperature extremes and can also be used outdoors. A similar type of tile is glazed porcelain tile. This tile …