Cracking that appears shortly after an installation is rarely a sign of the grout product itself being defective. More commonly, it indicates an issue with the underlying installation environment. If the grout was mixed with too much water, the resulting shrinkage as it dries causes cracks. Furthermore, if the tiles were not allowed to set properly before grouting, the shifting of the tiles during the application can disrupt the drying process and cause structural fractures in the grout lines. Perhaps the most significant factor is movement. If the subfloor is not sufficiently rigid or if there are issues with the expansion joints, the tile installation will move in response to temperature changes or building settling, placing stress on the grout that leads to cracking. For large areas, the lack of necessary movement joints at walls or perimeter transitions can also cause tension that forces the grout to split. If you notice cracks appearing in multiple areas, it is advisable to have a professional evaluate the subfloor and the installation method to rule out structural movement that could lead to tile failure.
Key considerations
- why is my new grout cracking
- grout cracks after install
- causes of grout failure
- grout
- thinset
- expansion joints