How to Patch Cracks in Brick Walls

Written by ehow home & garden editor
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Patching cracks in brick walls not only addresses an aesthetic issue, it also fortifies the wall itself. Cracks in brick walls can allow water, dirt and other foreign material to accumulate and cause deterioration of the structure. Repairing these cracks takes a little time and attention to detail. Here's how to patch them up.

Skill level:

Things you need

  • Brick mortar
  • Mortar trowel
  • Chisel
  • Compressed air
  • Cleaning supplies

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  1. 1

    Remove all existing, damaged mortar from between the bricks. Use a chisel to remove and rake out any mortar to twice the width of the joint. Use caution not to chip or damage existing brickwork when raking and removing mortar.

  2. 2

    Clean out the joints with compressed air and a small brush. Ensure that the joint and surrounding area is free of dust, dirt and debris.

  3. 3

    Purchase a brick mortar that closely resembles the existing mortar in color and texture. Take a sample of the existing mortar to a home improvement store such as Lowe's or Home Depot for analysis. This will ensure a proper match in color and texture.

  4. 4

    Inspect the cracked brick walls to find any other areas affected by the damage. Repair all cracks at the same time.

  5. 5

    Mix mortar according to the manufacturer's instructions and apply liberally to the cracks. Push each load of mortar deep into the affected area. Smooth out the joint and allow drying. This process may take up to 3 days.

Tips and warnings

  • Inspect the brickwork on older historical homes to determine whether more extensive damage has been caused by the brick wall cracks.
  • Wear eye protection and gloves at all times when working with mortar and cleaners.
  • Consult a professional if you notice extensive brickwork damage. This damage may have structural implications that require further inspection.

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