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How to Repair a Big Hole in a Cinder Block Wall?

by James Antony | Last Updated: 18th June 2020

Why is it important to fill in both the small and large holes in your cinder block wall? Sincerely speaking, big holes in a cinder block wall are not only unappealing but also they may result in crumbling of the entire wall since, with time, they might end up growing into very larger holes.

For instance, during a humid day, the moisture is likely to accumulate around the edges such a gap. As temperate fluctuates from time to time, such edges become very brittle and eventually crumble, and the process continues. However, to stop this process from further damaging your cinder wall, it is imperative to clean and fill both small and big holes in your cinder block wall.


Yes, it is the sure way to stop that process from growing worse as weather changes day after day. Besides, filling these holes improves the general appearance, makes the wall stable, and you can as well apply the tint patches, the paint of your choice, or stain to resemble the color of the original wall.

How to Repair a Big Hole in a Cinder Block Wall?

Although it may take several hours or even a day to fill a large patch hole in your cinder block wall, you need to have the right tools and equipment to ensure your work is perfect. Make sure that you have the following gears with you before starting your work. Small chisel, Water, Portland cement, Sand, Hose spray nozzle, Stiff brush, Trowel, and Bucket.

Check this video to get more info on how to repair holes in a wall in general and how to repair a big hole in a cinder block wall as well.

How Do You Repair Cracks in a Foundation Wall?

Do you know that the foundation of your home is always under constant stress arising from different forces? The foundation supports the entire weight of the house, including people and objects inside it. Due to unseen ground shifting and constant exposure to adverse elements of weather such as temperature valuations and moisture changes, holes and cracks may develop on the foundation wall.

How to repair a big hole in a cinder block wall?

Remember, whenever new cracks and holes start designing, it is recommended to patch them as soon as possible. This is because, during winter, water may accumulate in these cracks. When water freezes inside the cracks, it makes them more substantial, thus damaging the entire foundation wall, which may result in significant problems.

How Much Does It Cost to Fix a Large Hole in the Wall?

I remember last year when my family and I relocated to our newly bought apartment, I had previously emailed a well-known contractor to do our garage wall renovation, but to my surprise, he kept postponing until I said enough is enough. I feared the structural issues of my garage concrete wall would deteriorate, especially that the winter was approaching.

Although the holes had existed for almost a year, these guts at home depot seemed to make fun out of this mess rather than doing the necessary. I decided to end the differences and slightly swung into action in a beginner-friendly way. The blueprint idea was to fill it using bricks and finally apply a thin concrete coat.

This coat would blend perfectly with the original coating once I paint the entire wall. I collected enough blocks that were lying randomly around the yard with no specific purpose. Besides, I bought some cement sand, mortar mix, and a trowel at a sum cost of $25. If I had to purchase bricks instead of gathering them, it would have cost me an additional $8 so that the total cost would be $33.

How Do I Fill a Hole in a Concrete Wall?

  • Mix the mortar. Start with relatively small batches, especially if you are a beginner, to ensure you get the right ratio and consistency. Besides, it would be easy to mix to attain a clumpy and wet appearance.
  • Join the bricks using the mortar and ensure you neatly arrange the blocks as much as possible. Otherwise, don’t worry, since the cement would cover them anyway.
  • Apply a layer of well-mixed mortar on both sides of bricks using a trowel. You can scrape away all the excess mortar that could otherwise be seeping out.
  • According to the size you are filling, it can take about two or three hours to fill the entire hole.
  • Give it about one or two weeks before you apply the cement. Once you are done applying cement, smooth it using the backside of your trowel to come up with a flat surface.

Thanks for reading and please comment our How to Repair a Big Hole in a Cinder Block Wall post! And don’t forget to check our other articles and reviews – Best Subfloor Adhesive could be interesting for you!

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