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.
How long does it take for grout to set? A: Grout must set for 15 to 30 minutes before it is wiped for the first time and another 3 hours before it is wiped a second time, according to BobVila.com. In both stages, the grout should be wiped with a wet sponge to remove excess grout on the tile.