If grout is not applied properly, it may lead to staining, chipping, and cracking, among other issues. For this, you may use a grout float to apply the material. Achieving a professional-looking finish when installing ceramic tiles requires attention to detail and a thorough understanding of the installation process. Despite the best intentions, many DIY enthusiasts and even experienced installers make common mistakes that can compromise the quality and. Tile installation problems are very common and even experienced tilers may run into issues when dealing with challenging installation projects. To avoid future problems, here's a list of the most common mistakes and how to fix them.