Grout & Mortar

Mortar and grout are used in both masonry work and tile work; however, they serve different purposes.  Both products are Portland cement based product, which causes them to harden.  The variables are in the size of the aggregates (stone, sand, etc) and the quantity of water added to the mix.


The role of mortar is to make one material stick to another.  For instance, a mason laying bricks or concrete masonry units (CMU) will place morter in the joints between the bricks or blocks.  Similarly, a person installing tile will lay a mortar bed so the tiles stick to the floor or wall.


Grout is a filler product and is intended to flow.  Therefore, it usually has a higher water content.  A mason will fill the cores of a CMU with grout.  A person installing tile will use a grout to fill the spaces between the tile after the mortar has cured.

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