How to Cut Cinder Block Wall with Circular Saw – Detailed Steps

how to cut cinder block wall with circular saw

Cinder blocks are mostly used for construction purposes since they provide buildings with a strong and sturdy foundation.

Fortunately, this isn’t a difficult task. You can easily do it yourself if you have the right tools and if you follow the correct instructions. 

So without further ado, let’s dive into this detailed guide.

Quick Summary

In this post, we will go over:

  • Different circular saw blades to cut cinder blocks
  • Things you need
  • How to cut cinder block walls with a circular saw? 

Let’s get started. 

Different Blades to Cut Cinder Blocks

The most important thing you need to know to cut cinder blocks is what makes the cut is the blade, not the saw. Therefore, you need to choose the correct blade to do the job otherwise you will only end up with a broken blade.

There are four types of blades designed to cut cinder block walls:

Masonry Abrasive Blades 

This is a perfect choice if you want a more affordable option. However, it’s not as fast as other blades. It might take you a while to cut cinder blocks with a masonry abrasive blade. 

It also gets worn out very quickly so you may need to replace it time and again if you’re doing a big project. 

Diamond Blades 

In terms of quality, diamond blades are better than masonry abrasive blades. They are made of a compound of diamond and another reinforcing metal. 

Although they are quite expensive, we think the price is justified since they are much more sturdy and perfect to cut down hard materials. 

Wet Circular Blades 

The problem with these blades is that it gets extremely hot when it is used to cut materials like concrete and cinder. But, if you add steam of water to the blade during the cut it will lubricate the blade as well as stop the production of silica dust. 

Dry Circular Blades

These come with segmented teeth to expel the heat produced by the cut. What we love about these blades is that they have an extremely long life span. 

However, they do produce a lot of silica dust during the cut. Therefore, we recommend you wear a respirator or a dust mask if you decide to use this blade. 

Things You Need 

  • A chalk line 
  • Good quality circular saw 
  • Protective gear such as respiratory mask, hearing protection, safety goggles, gloves, etc

How to Cut Cinder Block Wall with Circular Saw?

cinder block

Step 1 – Wear protective gear 

As we mentioned before, with different types of blades you can expect dust and noise. This can harm both your respiratory system, your eyes, and your ear. 

Therefore, before you get started you need to adequately equip your body with safety gear such as a mask, ear protection, and safety goggles. 

Step 2 – Mark the place that needs to be cut with a chalk line 

You need to plan exactly where you need to cut before actually engaging in it. Once you’ve decided that places need to be cut, mark them with a chalk line.  

The mark will serve as a guideline to where the circular blades will go through to cut.

Step 3 – Make adjustments 

This is where you will position the circular saw blade with the mark. Make sure the saw is set at a ripping size of 50mm. 

Keep the cinder block in place with your non-dominant hand and use your dominant hand to align the saw. 

When you look down on the saw from above, you should see a notch in front of the metal surface. This is where the saw will cut. Carefully position this mark with the chalk line you made earlier. 

Once everything is adjusted and positioned, turn on the circular saw and wait for it to reach its maximum rate revolution.

Step 4 – Start to cut the cider block 

Gently start to cut the cinder block where you marked the chalk line. You should guide the saw and the blade, but remember to not put extra pressure on the saw during this whole process.

 If you force the blade too much the circular saw may stop or the whole block might get ruined.

Step 5 – Spray water to cool the blade 

This step is only relevant if you’re using a wet circular saw blade. When you cut cinder blocks they release silica dust that is detrimental to your health. 

The water will act as a lubricant and cool down the blade. It will also make the dust settle down. 

Cutting cinder blocks while you spray water might be dangerous for a single person to do. 

Therefore, we suggest you ask for a helping hand to add water to the blade.

Step 6 – Stop the blade every 45 seconds 

We do not recommend your make continuous cuts. This may result in an overworked blade and an undesirable outcome. 

You need to make intervals after every 45 seconds to let the heat dissipate so the blade is easy to work with. 

Step 7 – Clean the cinder block with a rag 

Once you’re done, the cinder block will most likely be covered with fine dust. Dampen a rag with clean water and then wring it out. Run the rag over the cut half to them up. 

While you’re at it, don’t forget to clean your circular saw before you put it away. 

Wrapping Things Up…

This brings us to the end of our article. We hope you now know how to cut a cinder block wall with a circular saw. 

Keep in mind that this is a common activity therefore it’s important to invest in a good blade. If you want quality and have a flexible budget, we would recommend the diamond blade. 

However, if you want something light on the pocket you can always go for a Mansory abrasive blade. 

Our website can be the guide for different types of blades and where to use them.

Lastly, don’t forget to wear protective gear such as a mask and goggles while you operate a power tool.

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