Cutting HardieBacker board is an essential skill for anyone involved in home improvement or construction projects. This durable cement board is widely used as a substrate for tile installations in bathrooms and kitchens due to its strength and resistance to moisture. However, working with the HardieBacker board requires special tools and techniques to ensure precise and clean cuts.

In this guide on how do i cut hardiebacker board, you’ll learn the steps needed to effectively cut HardieBacker board, whether you’re a DIY enthusiast or a professional contractor, ensuring your projects are both efficient and successful.
What is HardieBacker Board?
First, let’s understand what HardieBacker board is and why it is a popular choice for tile installations.
HardieBacker board is a type of cementitious backer board used as an underlayment for tile. It is made from a mix of cement and sand, reinforced with fiberglass mesh on both sides to increase its strength and stability. This combination makes it resistant to moisture, mold, and mildew – making it an ideal substrate for wet areas such as bathrooms and kitchens.
Additionally, the HardieBacker board’s durability also makes it suitable for use in high-traffic areas like floors and walls, providing a solid base on which tiles can be installed. It comes in different thicknesses, including 0.25 inches, 0.42 inches, and 0.5 inches, allowing you to choose the most appropriate thickness for your project.

Tools Needed for Cutting HardieBacker Board
Before we dive into the steps for cutting the HardieBacker board, let’s first gather all the necessary tools. These include:
- Measuring Tape or Ruler
- Pencil or Marker
- Straight Edge or Square
- Utility Knife With a Sharp Blade
- Jigsaw With a Carbide-tipped Blade
- Dust Mask
- Eye and Ear Protection
- Work Gloves
Having all these tools at hand will ensure that you can make precise and clean cuts without any safety hazards. It’s also essential to wear proper protective gear, especially when cutting HardieBacker board, as the dust particles produced can be harmful when inhaled.
8 Steps on How Do I Cut Hardiebacker Board
Step 1: Measure and Mark
Begin by measuring the area where the HardieBacker board will be installed. Use a measuring tape or ruler to take accurate measurements, ensuring you consider any irregularities in the space around walls, plumbing fixtures, or other obstacles.
Once you have the measurements, transfer them onto the HardieBacker board using a pencil or marker. To ensure straight lines, use a straight edge or square. Carefully mark the dimensions on the board, double-checking for accuracy. This step is crucial as precise measurements and markings will contribute to a clean, professional-looking tile installation.
Step 2: Score the Board
With your measurements and markings in place, it’s time to score the board. Using a utility knife with a sharp blade, carefully score along the marked lines on one side of the board. It’s essential to make multiple passes over the same line, gradually increasing pressure as you go. This helps avoid any unwanted breakages or chipping when cutting later.
It’s also a good idea to score both sides of the board, especially for thicker boards, to ensure a clean cut all the way through.

Step 3: Snap the Board
After scoring one side of the HardieBacker board, flip it over and snap it along the scored line. To do this, position a straight edge or square under the scored line and apply gentle downward pressure until it snaps cleanly along that line. Alternatively, you can use your hands to snap the board by bending it along the scored line until it breaks.
The goal is to have a clean, straight edge on the board without any jagged edges or chips. This step can be repeated as needed for multiple cuts.
Step 4: Set Up the Jigsaw
Now that you have your HardieBacker board cut into manageable sizes, it’s time to set up the jigsaw. Choose a carbide-tipped blade suitable for cutting cement board and install it into the jigsaw following the manufacturer’s instructions.
It’s also a good idea to mark which side of the blade will be facing up so that you can keep track of where your cut will be.
Step 5: Cut With Jigsaw
With the jigsaw set up and ready, position the HardieBacker board securely on a stable surface, such as a workbench or sawhorse, to prevent movement while cutting. Align the carbide-tipped blade of the jigsaw with the marked line on the board. Turn on the jigsaw and begin cutting along the prescribed path, maintaining a steady pace to ensure a clean and precise cut.
Make sure to keep the blade perpendicular to the board to avoid angled cuts. As jigsaws can create dust, it’s vital to wear your dust mask and other protective gear throughout the process. Continue cutting until you have achieved the desired size and shape, and remember to inspect the cut
edges for any smoothness adjustments.

Step 6: Cut Holes and Curves
For holes or curves in HardieBacker board, a jigsaw is the best tool to use. Start by drilling a hole at any point on the marked line using a carbide-tipped drill bit, making sure it’s large enough for your jigsaw blade to fit through. Then insert the jigsaw blade into the drilled hole and begin cutting along the prescribed path.
Take your time when cutting around curves to avoid any jagged edges or breakage. And remember to always wear proper protective gear.
Step 7: Perfecting Your Cuts
After you have made all necessary cuts, inspect each piece of HardieBacker board to ensure all cut edges are smooth and free of jagged edges or chips. If needed, use a rasp or sandpaper to smooth out any imperfections.
You can also use a drill or utility knife to create notches for obstacles such as pipes or outlets, but be careful not to apply too much pressure that may cause breakage.

Step 8: Clean Up
Once all your cuts are complete, it’s time to clean up. Use a vacuum cleaner or broom to remove any dust and debris from the HardieBacker board. It’s also essential to properly dispose of any materials according to local regulations.
As you can see, cutting the HardieBacker board is a straightforward process that requires precision and proper safety precautions. By following these steps on how do i cut hardiebacker board, you’ll have clean and precise cuts that will provide a solid base for your tile installation project. Remember to always wear protective gear and use the appropriate tools for a successful outcome. Happy cutting!
Additional Tips and Tricks
- It’s recommended to have someone help hold the HardieBacker board steady while cutting, especially with larger pieces.
- To avoid chipping on the finished side of the board, place a strip of painter’s tape along the marked line before scoring and cutting.
- If using a jigsaw on thicker HardieBacker boards, it may be helpful to make relief cuts first to reduce the risk of breakage when cutting curves or holes.
- Use a circular saw with a diamond-tipped blade for longer, straight cuts on thicker HardieBacker boards.
- Always follow the manufacturer’s instructions and safety guidelines when using power tools.
Now that you know how to cut HardieBacker board like a pro, you can confidently take on your next tiling project with ease. Remember to prioritize safety and precision in all your cuts for the best results. Happy tiling!
Frequently Asked Questions
Q: Can I Use a Circular Saw to Cut Hardiebacker Board?
A: Yes, a circular saw with a diamond-tipped blade is suitable for cutting thicker HardieBacker boards. However, it’s recommended to use a jigsaw for more precise cuts. The circular saw may also create more dust, so wearing protective gear is essential.
Q: Can I Use Scissors to Cut Hardiebacker Board?
A: No, scissors are not strong enough to cut through the HardieBacker board. It’s best to use a utility knife or jigsaw for clean and precise cuts.
Q: Do I Need to Wear Protective Gear When Cutting Hardiebacker Board?
A: Yes, it’s important to wear proper protective gear such as a dust mask, safety goggles, and gloves when cutting HardieBacker board. The process can produce dust and sharp edges that can cause injury if not handled carefully. So, always prioritize safety first.
Conclusion
Cutting HardieBacker board can initially seem daunting, but with the right tools and safety precautions, it becomes a manageable task that can be mastered with practice. By following the outlined steps on how do i cut hardiebacker board, from initial scoring to making precision cuts with a jigsaw, you can achieve clean, professional results that set a solid foundation for any tiling project. Remember the importance of prioritizing safety by wearing protective gear and utilizing appropriate cutting tools like carbide-tipped blades or diamond-tipped blades for thicker boards.
With careful attention to detail and patience, your tiling installation will not only be successful but also durable and long-lasting. Embrace the process, and soon you’ll be cutting HardieBacker board with the confidence and skill of a seasoned DIY enthusiast. Happy cutting and happy tiling!
Professional Focus
Angela Ervin, a former interior designer turned blogger, specializes in kitchen design and renovations. Through her website, she blends her passion for cooking with design expertise, sharing practical and creative ideas. Known for balancing functionality and beauty, Angela’s insightful content has made her a trusted voice in home design and lifestyle.
About the Author
Angela Ervin, an experienced interior designer and blogger, combines her passion for kitchen renovations with storytelling. Living in Petersburg with her family, she enjoys cooking and testing her projects firsthand. Known for her humor and relatable style, Angela shares creative, functional design insights through her content, making her a trusted voice in home design.
Education History
University: Virginia Commonwealth University
Degree: Bachelor of Fine Arts (BFA) in Interior Design
- Angela’s education at VCU focused on mastering core interior design principles, including spatial planning, color theory, materials selection, and sustainable design practices.
- She gained hands-on experience through studio projects and collaborative design exercises, which honed her ability to create functional and aesthetically pleasing environments.
- Her coursework also emphasized problem-solving and practical applications of design, preparing her for real-world projects like her self-directed kitchen renovations.
- The program’s strong foundation in both technical skills and creative expression shaped Angela’s ability to seamlessly integrate form and function in her work.