Mortar and Grout Guide in Nashville and Middle Tennessee
Material guide

Mortar and Grout Guide

The mortar between units does the quiet work in every masonry wall. Here is what it is and why it matters.

Mortar is the mix of cement, lime, sand and water that bonds bricks and stones together. It also cushions the units and lets the wall move slightly. Grout is a thinner mix used to fill cells in block walls and gaps between stones.

The strength of the mortar matters. It should be softer than the brick it holds, so that stress and moisture are released through the joints instead of through the brick. Old walls need soft, lime-rich mortar, while new walls may use stronger mixes. Color and sand choice also shape the look of a wall.

Best for

  • Any brick or stone wall
  • Chimneys and steps
  • Historic restorations
  • Owners curious about repointing

Strengths

  • Bonds the wall
  • Allows slight movement
  • Color adds character
  • Can be repaired

Keep in mind

  • Wears over time
  • Wrong mix can harm brick
  • Color matching takes skill
  • Needs periodic repointing
The details

What defines Mortar and Grout

Bonds and cushions

Holds the wall together.

Softer than the brick

Protects the units.

Color and sand choices

Shapes the look.

Lets walls breathe

Releases moisture.

Different mixes for different jobs

Old walls, new walls, block.

Needs repointing over time

Plan for it.

Questions

Mortar and Grout FAQ

Why does mortar crumble?

Weather, water and age wear away mortar over decades.

Is stronger mortar better?

Not always. Mortar should be softer than the units.

Can mortar be colored?

Yes, with pigments chosen to match.

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