Why should grout be allowed to cure properly before exposure to water?

Grout needs to cure properly before being exposed to water primarily to ensure that it hardens and develops the necessary strength. During the curing process, chemical reactions take place within the grout that allow it to set and achieve its designed compressive strength. If grout is exposed to water too soon, it can interfere with these reactions. This can lead to weak bonds within the material, resulting in reduced performance and longevity of the grout joint.

When grout cures properly, it becomes resistant to moisture, staining, and cracking over time. Sufficient curing time promotes the formation of a dense, strong matrix that is crucial for sustaining loads and resisting wear in areas such as floors, countertops, or walls where tiles are installed. Hence, allowing grout to cure completely is critical for achieving a durable installation that withstands the test of time.