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 after grouting a floor do I have to wait before mopping? A: It is best to wait at least 72 hours before mopping a newly grouted floor to make sure the grout has a chance to cure completely. This also allows enough time for the adhesive substances on new tiles to cure.