- Question: Concrete slabs are typically covered and wetted down periodically when poured to facilitate proper curing. Should masonry walls be cured in a similar manner by misting or other means to keep them wet?
Answer: Typically, new masonry walls are not misted. In most cases this action is not practical and not necessary. While misting the walls may improve hydration of the mortar and reduce shrinkage, it also increases moisture in the walls that may contribute to new building bloom or efflorescence caused when the moisture dries and deposits soluble salts on the face of the masonry.
However, in a dry environment wet curing may be necessary to prevent drying out before sufficient cement hydration occurs. This situation may be especially true if masonry cements containing pozzolans are used.