You should wait at least 24 hours before grouting the tiles. You may notice that the edges of the thinset or the thinset showing through the grout lines looks dry. Don’t be fooled by this. The thinset under the tiles isn’t receiving as much air as the edges and is therefor not fully cured.
How Long for Tile Mortar to Dry?
Tile mortar is an important component in any tile project, providing the bond between the substrate and the tiles. Knowing how long it takes for the mortar to dry is important in ensuring that your tile project is successful. Depending on the type of mortar you are using, drying time can vary from a few hours to several days.
The type of mortar you are using is the first consideration when looking at drying time. Thinset mortar is the most common type of mortar used for tiling and takes longer to dry than other types. Thinset mortar is a blend of cement, sand and a latex or polymers agent. Generally, thinset will take 24 to 48 hours to dry. However, the actual time can vary depending on the type of thinset mortar you are using, the conditions of the environment, and the thickness of the layer of mortar.
For those looking for a faster drying time, other types of mortars are available. Medium-bed mortars are a great option for larger tiles, as they are thicker and provide a stronger bond. These mortars typically take 4-8 hours to dry, depending on the conditions.
Another factor that affects drying time is the conditions of the environment. Heat and humidity can