Mortar Types & MaSoN wOrK

Use it for both reinforced and unreinforced masonry that may be subject to high compressive loads, severe frost action, or high lateral loads from earth pressures, hurricane winds, or earthquakes. Type M may be used in structures below grade and in contact with soil, such as in foundations, retaining walls, walks, sewers, and manholes. To produce Type M mortar, combine one bag of Coosa Portland Cement and one bag of Coosa Light Type N Masonry Cement (see Type N description below) along with 4 ½ to 6 cubic feet of damp, loose, masonry sand. *

Use Coosa High Strength Type S Masonry Cement for structures subject to normal compressive loads, but that require high flexural bond strength. Also, use Type S where mortar is the sole bonding agent between facing and backing, such as adhesion-type, terra-cotta/stone veneers. To make Type S mortar, use one bag of Coosa High Strength Type S Masonry Cement with 2 ¼ to 3 cubic feet of damp, loose, masonry sand.*

It is well suited for masonry veneers and interior walls and partitions. Type N mortars accept a wide range of pigments for custom color applications. This medium strength mortar, which achieves a minimum of 750 psi provides excellent workability and board life. Use one bag of Coosa Light Masonry Cement with 2 ¼ to 3 cubic feet of damp, loose, masonry sand.*

It is primarily recommended for tuck-pointing and similar repair work. Its’ exterior use is limited because of its’ low structural limitations. It is not recommended for areas of high winds. When preparing Type O mortar, combine 1 bag of Coosa Portland Cement and 1 ¼ to 2 ½ cubic feet of Type S hydrated lime along with 2 1/4 to 3 times the sum of the separate volumes of cementitious materials of damp, loose, masonry sand.* Mix all of the solid materials and then add sufficient water to produce a damp mix that will retain its shape when pressed into a ball by hand. Mix time is 3 to 7 minutes, preferably with a mechanical mixer. Let the mortar stand for 1 to 1 ½ hours for pre-hydration. Add sufficient water to bring the mortar to the proper consistency for tuck-pointing, which is somewhat drier than for laying the units.