Mosaic tiles are popular choices for rooms that are exposed to high humidity levels such as the kitchen, bathroom, and the pool. Shell mosaic tiles combine both a classic beauty and versatility making them the perfect choice for bathroom and kitchen mosaic backsplashes. At one time, using mosaic tiles for a backsplash was difficult because you had to lay each individual tile one by one. But today, mosaic tiles are available in sheets, making it much easier to install them as a backsplash. Here are a few tips to help you when installing a mosaic backsplash.