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.
1- How long should we let the tile and thinset sit before grouting? If you are using basic 12 x 12 porcelain field tile and bagged thinset mortar, wait 8 to 12 hours before grouting. - How long should we let the grout dry? You said you used a non-sanded grout, and if you got it from us, it should look something like this.... Polyblend non-sanded grout typically dries in 6-7 hours. The thinner the tile spacers you put in, the faster it will take the grout to dry.