This stress will be tensile during temperature decrease, or compressive. during temperature increase. If the compressive stress level exceeds the column buckling resistance of. the restrained length, then lateral buckling (or snaking) will occur.
Dry Time. In most cases, you should allow the grout to dry overnight before using that room as total dry time may take up to 24 hours. If you are thinking about sealing your grout after you have installed it, you need to wait even longer than that so that all of the moisture has had time to be released.
The dried mortar can be removed with a utility knife or grout saw. Vacuum any dust off the face of the tile and out of the grout joint. After the thin set has dried for at least 24 hours, it's time for grout. The dry ingredients are mixed together to evenly distribute the color pigments. Then the powder is added to a small amount of water and stirred.