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How to Cut Hardie Board Siding: 6 Steps to Follow

How to Cut Hardie Board Siding

Cutting Hardie board siding can be a difficult task.

Hardie Board is a fiber cement-based product with many benefits, but cutting it with the wrong tool can lead to disaster. If you’re looking for an easy way to learn how to cut hardie board siding.

We’ll walk through the steps of using a jigsaw and circular saw to make clean cuts in your Hardie board so that installation goes smoothly and quickly. You’ll also learn about some helpful tips for getting the best results from these tools.

The Best Tool to Cut Hardie Board Siding

Hardie board has a fiber cement-based backing that is durable and smooth, which means it can be cut with a utility knife, hole saw, miter saw, or jigsaw.

Circular saws can also be used for smaller cuts, such as siding, that don’t require much precision.

What’s the best tool? Why should I choose a specific siding material? It depends on what your needs are. If you need something portable, then get the utility knife. If you want more precision, then go with the miter saw or jigsaw.

Finally, if you just need to make some straight cut, like cutting out an outlet hole in your finished walls, then grab the circular saw.

The key to all of this is the carbide blade that you use. The sharper the blade, the cleaner and straighter your cut will be.

Step by Step Guide on How to Cut Hardie Board Siding

If you’re thinking about cutting some Hardie Siding, then you’ll want to make sure you know how to do it. You can use a circular saw for smaller cuts that don’t require too much precision, but for larger boards, you’ll want to find a jigsaw or miter saw that has a very sharp saw blade.

Both of these tools will cut right through the fiber cement siding that makes up the board. Cutting straight is pretty simple with these tools. If you need something more detailed, then you’ll have to find a way to mark your cuts with either a T-square or an engineered square.

Step 01: Measurements

The first thing that you’ll need to do is take your measurements using either a T-square or an engineered square. The engineered square will be much easier for these kinds of cuts because the tool itself can make all the necessary notches to mark each cut line.

Using a T-square is possible, but it can be more difficult. With these kinds of cuts, you want to minimize your mistakes so that you waste as little of the board as possible. It’s much easier to try again than to start over completely.

Step 02: Take the Position

Take the Position

Once you’ve marked your cut lines, the next thing that you’ll want to do is get the board up off the ground so that it’s at a comfortable working height. You don’t want to be bent over or hunching over if possible. Holding the board against your chest can be very uncomfortable.

Step 03: Using Sawhorse

Using Sawhorse

Using sawhorses will give you an excellent working height, but sometimes the board is too heavy for that. Instead, you can use the floor to support your board while you are cutting it.

Using a jigsaw or even a circular saw will allow you to control your cuts much better if you’re holding the board up instead of simply laying them on something with wheels or without.

Remember that you’ll need to be much more accurate when using this method, but the cutting won’t be very taxing for your arms or hands since most of the work will be done by the machine itself. Using a circular saw will allow you to simply hold the cement backer board and slowly cut away at it, while a jigsaw will require you to guide the tool.

Step 04: Keeping the Proper Angle

Keeping the Proper Angle

Keeping your angles and lines straight when using a circular or jigsaw saw can be difficult, but there are several things that you can do to help with this. If you’re looking for something precise, then a miter saw is much more accurate than a circular or jigsaw saw can ever be.

Use a combination square to make sure that your lines are as straight as possible, and you can even use a pencil-sized laser to light up your lines. This will allow you to see any mistakes much easier, but it’s not very practical for large boards.

Step 05: Using Circular or Jigsaw Saw

Using Circular or Jigsaw Saw

Using a jigsaw is the simplest way of cutting Hardie plank siding since it doesn’t require any tools whatsoever. The downside, of course, is that it’s a little more dangerous, and you won’t get as clean a cut.

While cutting cement board siding, You can work your way around this by using a jigsaw with a guard, but be sure to wear safety glasses in case the guard fails. For smaller cuts, use either a circular saw or a jigsaw with a guard.

When using your circular or jigsaw saw on the Hardie plank, you’re going to want to make sure that there is no power running through the tool. This can cause dangerous currents and sparks that could easily end up in your hands or face.

Trying to cut without unplugging it first will only lead to disaster. Be prepared to set aside a large chunk of your day to cut even one piece of fiber cement siding. It can be tedious work, but the result will be a clean straight line that you couldn’t have otherwise gotten from simply using a utility knife.

To cut the fiber cement siding, you’ll want to make sure that all of your measurements are correct before you start. Once everything is in the order, you can plug in your circular or jigsaw, and cut along the lines that you’ve marked.

This is where it gets tricky because if you’re not careful, the blade of the saw could slip out of place and ruin your entire cut line. You’ll want to keep a small distance between each line so that you don’t get dust or debris from the previous line in your way while you’re cutting.

Step 06: Pre Cautions

 Pre Cautions

Just remember that Hardie cement boards are incredibly durable and can withstand a lot of friction without wearing out. Just because it’s thicker doesn’t mean that it will wear out faster, and just because it’s thinner doesn’t make it any weaker than other kinds of cement siding or lap siding.

As long as you follow all of these steps and properly cut your cement boards, then you will have perfectly straight lines that are ready to be painted or have other adornments attached to them.

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Last Words

If you’re still having trouble cutting your cement boards after following this guide, then try getting a professional to help you out. But now you know how to cut hardie board siding.

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