How To Cut Cement Board With Circular Saw?

Cement boards are widely used in construction and home improvement projects due to their durability, moisture resistance, and versatility. However, cutting cement board requires the right tools and techniques to achieve clean and accurate results. In this article, we will explore the step-by-step process of cutting cement board.


What is Cement Board?

Before diving into the cutting techniques, it’s important to understand what cement board is. Cement board is a type of building material made from a combination of cement, fiberglass mesh, and filler materials. Its composition makes it highly resistant to moisture, mold, and fire, making it an ideal choice for areas prone to water exposure.


Tools and Materials Needed:

  • Cement board
  • Measuring tape
  • Pencil
  • Straightedge or T-square
  • Circular saw
  • Diamond saw blade
  • Safety goggles
  • Dust mask
  • Work gloves
  • Sawhorses or a stable work surface
  • Clamp or vise


How to Cut Cement Board?

Step 1: Prepare the Work Area

Start by clearing a well-ventilated and well-lit work area. Place sawhorses or a stable work surface to support the cement board during cutting. Ensure there is enough space to maneuver the circular saw without any obstructions.

Step 2: Measure and Mark

Measure the dimensions you need on the cement board using a measuring tape. Use a pencil and a straightedge or T-square to draw straight lines according to your measurements. Double-check your measurements to avoid any errors.

Step 3: Safety Precautions

Before proceeding with cutting, put on your safety gear, including safety goggles, a dust mask, and work gloves. Cement board can produce a lot of dust and sharp debris during cutting, so protecting your eyes, lungs, and hands is crucial.


Step 4: Set Up the Circular Saw

Attach a diamond saw blade to circular saw. Diamond blades are specifically designed for cutting hard materials like cement board. Ensure the saw is unplugged before changing the diamond saw blade. Follow the diamond tools manufacturer‘s instructions for blade installation, making sure it is securely fastened.

Step 5: Secure the Cement Board

Place the cement board on the sawhorses or work surface, ensuring it is stable and won’t move during cutting. If necessary, use clamps or a vise to hold the board in place securely. This will prevent any vibrations or accidental movement that could affect the quality of the cut.

Step 6: Adjust the Saw’s Depth

Before starting the saw, adjust the cutting depth of the saw blade. It should be slightly deeper than the thickness of the cement board to ensure a clean cut. Refer to the saw’s user manual to make the necessary adjustments.

Step 7: Start Cutting

Position the circular saw at the edge of the cement board, aligning the blade with the marked line. Start the saw and allow the blade to reach full speed before moving it forward slowly along the marked line. Apply gentle and even pressure to ensure a smooth and precise cut.

Step 8: Cutting Corners and Curves

When cutting corners or curves, it may be necessary to make relief cuts. These are small cuts made from the edge of the cement board to the marked line. Relief cuts will help prevent the cement board from cracking or breaking during cutting.

Step 9: Finishing the Cut

Continue cutting along the marked lines until you reach the end. Keep the saw moving steadily to avoid overheating the blade or causing any damage to the cement board. Once the cut is complete, turn off the saw and wait for the blade to come to a complete stop before setting it aside.

Step 10: Smoothing the Edges

After cutting the cement board, the edges may be rough or jagged. Use a medium-grit sandpaper or a sanding block to smooth any uneven edges. Be cautious not to apply excessive pressure, as it could damage the cement board.


Cleaning and Safety Tips

After cutting cement board, it’s crucial to clean up the work area promptly. Cement board dust can be harmful when inhaled, so use a vacuum cleaner or damp cloth to remove any debris. Dispose of the cement board scraps properly, as they may have sharp edges. Finally, store your tools in a safe and organized manner to avoid accidents.



Cutting cement board requires precision, proper tools, and safety precautions. By following the step-by-step process outlined above and utilizing a circular saw with a diamond saw blade, you can achieve clean and accurate cuts in cement board for your construction and home improvement projects. Remember to prioritize safety by wearing protective gear and ensuring proper ventilation in your work area. With practice and attention to detail, you can master the art of cutting cement board and achieve professional-looking results.


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