How to Repair Cinder Block Walls

Beginner 45 min 12 steps 28631 views Rating: 4.7/5 Published: 2026-05-26

Clean any parts of the wall that you plan to repair.. File away any rough edges.. Hose the wall down to get rid of dust or dirt.

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Steps

1

Clean any parts of the wall that you plan to repair.

Step 1

Clean any parts of the wall that you plan to repair.

2

File away any rough edges.

Step 2

File away any rough edges.

3

Hose the wall down to get rid of dust or dirt.

Step 3

Hose the wall down to get rid of dust or dirt.

4

Wait for the wall to dry off before repairing it.

Step 4

Wait for the wall to dry off before repairing it.

5

Patch smaller cracks or holes with concrete.

Step 5

Patch smaller cracks or holes with concrete.

6

Mix the concrete.

Step 6

Mix the concrete.

7

Mist any cracks or holes with a handheld bottle.

Step 7

Mist any cracks or holes with a handheld bottle.

8

Fill in the cracks or holes with concrete.

Step 8

Fill in the cracks or holes with concrete.

9

Chip out the old cinder block and mortar.

Step 9

Chip out the old cinder block and mortar.

10

Mix the mortar.

Step 10

Mix the mortar.

11

Apply mortar around the edges of the cavity.

Step 11

Apply mortar around the edges of the cavity.

12

Set the new block in place.

Step 12

Set the new block in place.

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