Mortar Mortar is a mixture of cement, sand, and water used to bond masonry units such as bricks, blocks, and stone. Unlike concrete, it does not contain coarse aggregate.
Mortar is commonly used for brickwork, stone walls, curbs, and other masonry repairs rather than for casting structural slabs. Different mortar mixes are designed for varying levels of strength, flexibility, and weather resistance. Choosing the appropriate mortar helps ensure compatibility with existing masonry and long-term performance, especially on older NYC buildings.
Frequently Asked Questions About Mortar
What is mortar?
A mixture of cement, sand and water used to bond masonry units such as brick, block and stone. Unlike concrete, it contains no coarse aggregate.
How is mortar different from concrete?
Mortar is a bonding material for masonry. Concrete is a structural material for slabs and paving.
Where is mortar used in sidewalk work?
In brickwork, stone walls, stone curb setting and masonry repairs, rather than for casting slabs.
Why does mortar selection matter on older buildings?
Using a mortar that is harder than the surrounding historic masonry can damage the original material. Compatibility matters as much as strength.