1. When laying a brick on a cement- sand- mortar, the air temperature should not fall below plus 5^C Not in the daytime or nighttime, at the time of the droping the rule can destroy the chemical. Process,which results in solubility and extinction
2. For the laying of walls from large-format-blocks with negative should be applied solutions withChemical antifreeze additives, a solution for work at a temperature of up to 10^C
3. When laying,u can not use frozen bricks or bricks on the surface,which have snow or ice
4. It is imortant to cover the surface of the sills^şwalls,watertight covers that will protect the masonry from rain inside the voids
5. In the heat at temperature of ,more than 25^C it is recommended to wet ceramic bloks with water, before laying

Follow the simple rules,and your walls will serve for a centuries.