How much sand do you mix with type s for mortar?
None,,type s mortar already has sand.Type S is sometimes specified for masonry at or below grade, but offers another quality. S has high compressive strength (1800 psi) but adds high tensile bond strength. S contains 2 parts portland cement, 1 part hydrated lime and 9 parts sand, and yields maximum flexural strength to fight wind, soil pressure or earthquakes. Also makes the best stucco.
