What is a common issue that can arise if the substrate is not properly prepared before tile installation?

When tile is installed on a substrate that has not been properly prepared, a common issue that can arise is the potential for tile cracking or loosening. This is primarily because a poorly prepared surface may not provide the necessary support or bonding strength required for the tiles to adhere properly.

If the substrate is uneven, dirty, or contains contaminants such as oil, the tile adhesive may fail to adhere effectively, leading to tiles becoming loose over time. Additionally, moisture issues can arise from an improperly sealed or prepared substrate, which can contribute to the weakening of the bond and ultimately cause tiles to crack as they expand and contract with temperature fluctuations.

The need for proper substrate preparation is critical in ensuring a durable and long-lasting tile installation, as it directly affects both the structural integrity and aesthetic quality of the finished surface.