When applying grout for concrete masonry, what is the recommended condition of the masonry?

Applying grout on dry masonry is recommended because it allows for better adhesion and effective filling of voids in the concrete masonry units. When the masonry is dry, it can more readily absorb the grout, ensuring that the mixture properly permeates and bonds with the materials. This is crucial for achieving the structural integrity that is necessary for the masonry assembly.

If the masonry is wet during or before the application of grout, it could lead to several issues. For instance, a wet surface can cause the grout to be diluted or not adhere properly, which might lead to weak joints or, in some cases, improper curing. Hence, having dry masonry optimizes the performance of the grout and enhances the overall durability of the installed masonry.