How to Use a Concrete Saw to Cut Cement

Since the rise of prefabrication and modular construction, the demand for concrete saws has increased substantially. Concrete saws are indispensable tools for cutting and shaping prefabricated structures, such as reinforced panels, floor slabs, and precast beams with precision. 

Even small and mid-sized contractors need to know how to use a concrete saw. If your home requires new plumbing or more electrical lines, a change to the driveway, or the patio, you will need to know how to cut concrete slabs.

This blog will help you to do that. It discusses different types of concrete cutting tools and how to use a concrete saw to cut cement.

Concrete Cutting Tools

There are different types of concrete saws depending on the project. As the term indicates, a concrete cutting saw is a power tool that contractors use for cutting through tough, dense materials like concrete, cement, masonry, brick, and asphalt.

Concrete cutting machines have a fast-rotating diamond-tipped blade, which makes them superior to conventional saws, ensuring precise cuts of hard materials.

Cut-Off Saw

Cut-off saws, also known as demolition or concrete saws, come in gas-powered and cordless versions. A traditional gas-powered concrete cutting saw has a two-stroke gas engine that delivers a high power output necessary for cutting tough materials.

Circular Saw

A circular saw features a fast-rotating, round blade, encased with a blade guard. A high-speed motor drives the blade. Circular saws are used to cut wood, plastic, brick, and concrete, depending on the blade.

This type of saw is one of the most commonly used saws today, and they routinely used for projects like cutting cement blocks, pavers, floors, and walls.

Chainsaw

A chainsaw is a powerful tool with teeth attached to a rotating chain, enabling it to make deep cuts through wood, tree roots, walls, floors, brick, and concrete and plastic. Chainsaws are handheld tools powered by gasoline or electricity. Corded and cordless models are available.

Walk-Behind Saw

A walk-behind saw, also known as a floor saw, is a concrete cutting machine powered by gas, diesel, air, electricity, or hydraulic systems. Mounted on wheels, a walk-behind saw can be pushed across the surface to be cut. They are fitted with specialized blades to cut highways and roads, concrete driveways, and sidewalks.

Wall Saw

Wall saws are heavy-duty machines with powerful high-frequency electric motors that enable them to cut through heavily reinforced concrete walls. These power tools are used in the construction industry to cut door and window openings and to demolish walls, concrete beams, and staircases.

Other tools used for cutting concrete include angle grinders, core drills, jackhammers, and rotary hammers.

Preparing for Concrete Saw Cutting

Choose the Right Concrete Cutting Blade

The type of concrete cutting blade you choose has a direct impact on the quality of concrete cutting projects. There are two kinds of blades commonly in use: diamond or abrasive blades.

Diamond blades consist of a steel core surrounded by a metal alloy embedded with synthetic diamond particles on the edge. These blades are purpose-made to cut tough materials, including reinforced concrete. They cut fast and are made to withstand the rigors of cutting through marble, granite, concrete, asphalt, masonry, and other tough materials.

Abrasive blades, on the other hand, are made from abrasive materials like aluminum oxide or silicon carbide bonded together. These blades cut a material by grinding through it, not slicing it. The friction causes the material and the blade to wear away. Abrasive blades are less expensive than diamond blades, but they wear away faster and need replacement more often.

When deciding which blade to use, you can be guided by the scope of your project. If you only need to make shallow cuts or do trimming work, an abrasive blade will be adequate. On the other hand, if you are planning to reshape your driveway, a diamond blade with wet cutting will deliver the best results.

Prepare the Workspace

Concrete cutting creates enormous dust clouds, obscuring visibility and compromising air quality. When working indoors, clear away random objects standing around that you won't need and that can cause you or someone else to trip. Remove all furniture or cover it properly before starting to work. Open windows and doors to improve ventilation. You can also install fans strategically to direct dust outdoors.

Consider using a professional-grade dust extractor to efficiently remove dust created by sawing concrete.

If you are working outdoors in a high-traffic area, consider rerouting people around the area. As with indoor cutting, remove as many items in the area as possible to create a clear, unobstructed workspace.

Wear Protective Gear

Concrete cutting is tough work. You need protection when using a concrete saw cutter. Protect yourself by wearing:

• Gloves with a high cut-resistance rating, such as A5.
• Safety goggles to shield your eyes from airborne particles released during cutting 
• A dust mask or respirator to protect your lungs against harmful airborne particles 
• Earmuffs or earplugs to protect yourself against long-term hearing damage, which can be caused by the high noise levels produced by concrete cutters

Scan the Concrete

Before cutting concrete, it's critical to scan it for hidden rebar, electrical wires, buried water pipes, gas lines, and post-tension cables. These are embedded hazards, and hitting them can cause costly damage and severe injury.

Concrete scanning is critical for safety and is required for OSHA compliance.

Prepare To Handle the Dust – Wet Cutting Vs Dry Cutting

Knowing how to cut cement requires knowledge about the two cutting methods: wet cutting and dry cutting.

Wet cutting uses water to cool the blade. Water also reduces silica dust significantly, which is a major health hazard. Saws set up for wet cutting have some sort of water-delivery system that supplies water directly to the blade as it spins.

Wet cutting concrete minimizes friction and reduces the risk of overheating, so it's the preferred method for cutting thick slabs. The running water makes it easier to see the diamond blade in action, leading to clean, and accurate cuts. Many construction professionals regard wet cutting as the best way to cut concrete.

Dry cutting, on the other hand, doesn’t use water to keep the tool cool. Dry cutting uses blades with segmented rims that allow airflow through the gaps to cool the blade as it cuts. Dry cutting generates a large amount of silica dust, so it's best performed outdoors using proper dust-control systems.

Dry cutting is typically used for short, shallow, or intermittent cuts—such as scoring or trimming small sections—especially in situations where a steady water supply isn’t available.

Make sure you have a consistent water supply available if you plan to do wet cutting.

Ensure the Concrete Cutting Machine and Concrete Cutting Blade Are in Top Condition

Concrete cutting is a demanding job that necessitates cutting equipment in prime condition. For your own safety, before you start cutting, inspect your concrete saw thoroughly.

• Inspect the blade for cracks, missing segments, chips, or excessive wear. 
• Ensure you're using the right blade for the task.
• Verify that the blade guard is securely attached and will cover the blade correctly.
• Check for any loose or missing bolts, screws, belts, or hoses, and attach them securely.
• Check all controls and switches to make sure they are functioning correctly.
• Check belts and hoses for signs of wear and tear. 

How to Cut Cement

A circular saw is one of the most commonly used saws among homeowners and professional construction teams for cutting brick, metal, concrete blocks, pavers, and walls.

Cutting Concrete with a Circular Saw

Here’s how to cut concrete with a circular saw.

Step 1: Mark the Cutting Line with Chalk

Start by delineating the piece or area you want to cut with a chalk line, connecting cutting points with straight lines. Do this carefully so you don't make a mistake when you start sawing.

Step 2: Set the blade depth.

With the saw off, set the blade depth to about the depth of the blade's diamond teeth (about 2 ½ to 6 ½ inches).

Step 3: Start Sawing, Scoring the Concrete

Turn the circular saw on and let it get up to speed before lowering it carefully onto the surface. Make shallow cuts to score the concrete, creating a guideline for subsequent deeper cuts. While cutting, keep a firm hold on the saw, and keep it at a 90-degree angle to the surface.

Step 4: Start Making Deeper Cuts

When you've scored the concrete, go over the scoring lines again, making progressively deeper cuts until the saw cuts completely through the concrete.

Step 5: Remove the blade

When you're finished with a cut line, let the blade come to a complete stop before lifting it up.

Note: Always follow the step cutting technique, making a series of shallow, incremental cuts rather than one deep cut to reach the desired depth. This technique removes material gradually, minimizing stress on the saw and the blade, ensuring quality cuts.

Concrete Sawing Mistakes That Impact Quality and Safety

Now that you know how to cut cement, it's time to alert you to the most common concrete sawing mistakes that can trip you up. They are:

• Not assessing the concrete correctly
• Using the wrong tools
• Using a saw that is not designed for wet cutting to do wet cutting
• Using a wet blade without using water.
• Not taking safety precautions seriously
• Using force when operating the saw
• Using dull blades
• Not locating the presence of electrical wires, water pipes and gas lines before cutting.
• Removing the saw from the cut while it is still spinning.

FAQs

Is cutting concrete difficult?

Yes. It is physically taxing and involves heavy equipment and materials. It is dirty work that can be very dangerous if proper precautions are not taken.

Is it better to hire a professional to cut concrete?

If you have limited construction experience, it’s usually best to hire a professional—especially when working with very thick concrete, reinforced concrete containing rebar, or larger areas that require precise, controlled cutting.

What is the easiest way to cut concrete at home?

A circular saw with a diamond blade is the best for cutting concrete at home.

Can I cut concrete indoors?

Yes, in principle, provided you take strict precautions to ventilate the area properly or isolate it completely, and use wet cutting or dust-collection systems.

Conclusion

Whether you're using a handheld concrete cutting saw or a heavy-duty walk-behind saw, it's crucial to know how to cut cement correctly. Ultimately, the best way to cut concrete is by scanning the concrete beforehand and using the appropriate tool for the job, using proper cutting techniques.

Are you a construction contractor, a supplier, or a homeowner about to renovate your home? You need to get in touch with MaxXTtools today. We manufacture and distribute a comprehensive range of wholesale power tools and construction equipment trusted by industry professionals and offered at affordable prices. Make that call now.