Installing tile over existing flooring requires proper preparation. Begin by ensuring the current floor is clean, dry, and level. If necessary, use a self-leveling compound to fill in any low spots. Apply a suitable underlayment if required, then lay the tiles according to your design, ensuring even spacing and alignment before grouting.

Installing tile over existing flooring can save time and resources. Key benefits include avoiding the mess of removing old flooring and potential cost savings. Challenges may involve ensuring that the existing floor can support the weight of the new tiles and maintaining level surfaces for proper installation.