To a bricklayer, the most important property of mortar is its workability. It must be freeflowing--without the segregation of water or solid materials in the mix. But too much water in mortar impairs its strength. So how much water is the right amount? The percentage of water used in mortar depends on the composition of the mortar, the moisture content of the sand, the type of units being laid, and the consistency desired. WHAT IS WORKABILITY? To obtain a workable mix, the laborer needs to add enough water to produce mortar that is "fat" and "sticky" and will resist the removal of substantial amounts of mixing water by the suction of the units. Workable mortar is easy to fluff up with peaks like whipped cream. Workable mortar clings to vertical surfaces and resists flow during the placement of masonry units. The workability of the mortar has a profound effect on the productivity and craftsmanship of the bricklayer. In order for bricklayers to do their best, mortar makers must do their best.