Brick Wall Repair: How to Repair Cracked Bricks Brick Wall Repair: How to Repair Cracked Bricks

What You'll Need
Safety goggles
Cold chisel
Pry bar
Brick chisel
Wire brush
Mortar coloring
Sand cement mortar
Mixing container
Circular saw
Masonry saw blade
Replacement brick
Spray bottle

As secure as brick walls may seem, eventually, there will be a need for a brick wall repair. Virtually all brick walls are vulnerable to cracking caused by such things such as expansion and contraction from changes in temperature, from shifting of the base on which these walls are built, and from imperfect mortar that might deteriorate. Given enough time, cracks will begin appearing in brick of any brick wall. Often these cracks, if not repaired, can widen and eventually cause some of the bricks to become loose and drop out of the wall. But you can repair these cracks, whether they are in a garden wall or a house wall. Even if you are not an experienced brick layer you will be able to replace broken or cracked bricks, just follow the 6 Steps below.


Step 1 – Prepare the Cracked Brick

Locate bricks that are broken or have cracks in them large enough to fracture the brick and create separate brick pieces. Remove loose brick pieces. For pieces which are broken loose from the primary brick but which you cannot remove, use a pry bar, or a chisel and hammer, to remove these pieces. This removal will likely leave brick dust and debris in the space left by the broken bricks. Remove with a stiff-bristle brush, this debris, along with and dust, dirt, or sand left in the vacated space.

Step 2 – Mix Mortar and Color

In a large bucket or container, mix mortar, sand, and water, and place a small pile of the mortar mix on a square board or piece of plywood about 15"x15." Add mortar color and mix into the mortar mix until your new color closely matches that of the mortar in the brick wall.

Step 3 – Measure and Cut a Replacement Brick Piece

Measure the space into which you will insert your replacement brick piece, leaving about ¼" space between the sides of the new piece and the sides of the older brick. This space will allow for the mortar you will later add. With your masonry saw and blade, cut a piece of brick to match the space you just measured.

Step 4 – Insert the Brick Replacement Piece

Before inserting the replacement piece, wet the brick, so the mortar will better adhere to it when the mortar is applied. Next, apply your freshly mixed mortar to the replacement piece, then insert the replacement piece into the space you've made between the bricks. Use a trowel to push the mortar tightly into the space on each side of the replacement brick.

Step 5 – Complete the Replacement

Make adjustments in the position of the replacement brick, so that an equal space appears on each side of the new brick piece. Allow this piece to dry and cure for at least 7 days, during which time you should spray with water the new brick piece and the mortar that holds it in place.

Step 6 – Repair Remainder of Bricks

Use the procedure from the above steps to replace other broken bricks in your wall.

Got a New Project You're Proud of?

Post it on Your Projects!