Can A Circular Saw Cut Concrete?


If you are an avid DIYer, you probably have an assortment of different saws at your disposal. Chain saw, circular saw, miter saw, the list goes on and on.  Each one has its own special purpose, of course, and you may question which saw should I be using to cut certain materials on my project? 

You can use a circular saw for a number of projects. A circular saw is a must have for any DIYer, this saw is designed for portability and can easily cut wood. This saw has a circular blade and is used to make straight cuts. Can a circular saw cut concrete? Yes, a circular saw can cut concrete with the right blade. An abrasive corundum masonry blade or a diamond blade are needed to cut concrete with a circular saw effectively and safely.

So now that we know we can cut concrete with a circular saw lets dig into some other aspects of what goes into cutting concrete with a circular saw.

If you want to find the best circular saws, click here.

What Is A Circular Saw

A cicular saw is a saw that has an abrasive of toothed circular blade to cut all different types of materials. This saw cuts by having the blade move in a high speed spinning motion. Most circular saws are hand-held and portable, which makes it easy to travel with from place to place and is why you see them all over construction sites.

Sometimes the circular saw might be referred to as the buzz saw. This is because when its powered on and in use, it makes a loud buzzzzzzzzzzzzz noise. This saw is used on a variety of projects and is a staple tool for anyone needing any types of cuts.

Do’s And Don’ts Of Cutting Concrete

As with any project there are few things that everyone should and shouldn’t do when they are cutting concrete. Lets discuss a few of them:

  • When cutting, refrain from forcing your saw blade into a cut. It is best to allow the weight of the blade and saw to do the cutting for you.
  • If you are dry-cutting, you want to prevent overheating, to do this you need to back off the blade and let it run by itself every 30-45 seconds.
  • When using a dry cutting blade you can use it with or without water, however, you must always have a wet blade with water.
  • Every time you are cutting concrete, always be sure to wear respiratory, ear and eye protection.

Always follow these guidelines when cutting concrete. These will ensure you cutting goes smoothly and safe.

Wet vs. Dry Cutting

So what is wet cutting? It is exactly what you probably had in your mind, this cutting technique uses water as an assistive agent for cutting through hard materials like concrete. Wet cutting is also used for jobs that last a long period of time, this technique aids in less overheating and blade deterioration.

Then we have dry cutting, this method is used for intermittent and short-scale cutting. This technique needs ample airflow so the blade can spin freely, this will ensure the blade wont over heat.

Both of these methods can be used effectively. Dry cutting is used mostly when it is essential to keep the space dry. Wet cutting comes in handy to abusive cutting and reduces health hazards because the water makes it so no dust particles enter the air.

With either of these methods it is still important to make sure you have the proper blades to get the job done.

Blades That Cut Concrete

To cut concrete there are two distinct types of blades that are required. Lets dig into the details on each one of the blades that can cut through concrete.

Abrasive Corundum Masonry Blade

Luckily, these are pretty inexpensive blades. However, since they are so cheap it means that they aren’t as fast as your usual blades. This also means that they cant cut as deep, when used they can only cut shallow cuts. When you are using this blade your project may take a little longer as well because the blade moves slowly and the blade will ware down fast.

Diamond Blade

A more expensive option but higher quality blade is a diamond blade. These diamond blades are amazing at cutting through concrete. If you want to get the job done quicker and more efficiently then I would recommend the diamond blade over the abrasive corundum masonry blade.

Safety Precautions

As with any and all other projects, it is vital we take safety precautions seriously. Below are some precautions to always take seriously when using a jigsaw.

  • Circular saws produce dust, and if you’re cutting concrete chunks and dust will be flying everywhere! Be sure to wear a mask and goggles when using your circular saw. Nothing is more painful than a tiny piece of concrete in the eye.
  • Circular saws have exposed blades. Be sure to keep your fingers, hands, and any other part of your body out of the way of the blade. Also, if you have long hair, be sure to keep it tied back out of the way so it doesn’t impede your vision of the blade.
  • Be sure to keep the power cord out of the way of the blade as well. You certainly don’t want to cut the power cord in the middle of your project. Make certain to have an extension cord long enough not to tangle yourself up in.
  • Your blades should be sharp enough to do the job. If your blades are dull, there is a chance of them breaking, which is dangerous. Dull blades will not give you the finish you want either.

Safety first! Always make sure you follow safety precautions. A circular saw is a wonderful tool but used incorrectly can cause serious harm and be a danger to yourself or anyone else around.

Final Thoughts

There are a few things to consider when dictating if your circular saw can be used to cut concrete. If you need to cut concrete and the circular saw in the tool of choice your going to have to pick up a abrasive corundum masonry blade or a diamond blade. This blades are the only way your circular saw will be able to cut through concrete.

Related Questions

How long will a diamond blade last cutting concrete? Depends on the quality. High quality diamond blades can last for up to 120 hours of non-stop use. Low quality diamond blades will last only up to 12 hours of non-stop use.

How deep should saw cuts be in concrete? 1 1/2 to 2 inches. A general rule of thumb is to cut the concrete 1/4 of the actual thickness of the concrete.

How do I keep my concrete slab from cracking? Keep the concrete wet, this will ensure the concrete doesn’t loose water and becomes hardened.

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