How to Cut Durock Using These 3 Simple Ways

A cement board may be a DIYers best friend. However, do you know how to reduce its size? Luckily, here’s how to cut durock.




Because of cement board, it is not possible for DIYers to lay their tiles just like pros. For installations, it removes the need to set up the tiles in thick beds of mortar. So, you can just use the thin bed of mortar, which makes the process simple.

Cement board or durock also makes a harder and flatter substrate than plywood. The latter usually rots, sags, and warps.

If you are not yet convinced, then you should know that pros even use it on their every task, including installing floors, walls, and countertops.

However, one problem may arise when you use durock. DIYers may face an issue on how to cut durock that has a solid panel. Fortunately, we will reveal the different options to slice them quickly.

Overview of Durock

Overview of Durock

Cement board is often hard and flat that have the design to serve as a substrate for your tiles.

The basic types of durock often have Portland cement. Then, the first category is hard and heavy, somewhat the same as concrete. On the other hand, the other kind is soft, fibrous, and light.

With that aside, all boards are available in four various thickness: 7/16, ¼, 5/8, ½. Also, it has two different sizes: 4 feet by 8 feet and 3 feet by 5 feet.The three by five foot of ¼ cement board may cost you $90 to $11. The similar size sheet that is in ½ inch may cost you around $12 to $14.

Caution Before Cutting the Durock

As with any DIY home projects, you need the right protection that you can use when slicing the cement board. Also, before you start the process, you need to make sure that you put on your respirator mask and eye goggles.

You need to remember that cutting the cement will give off the dust that may harm you when it gets in your eyes or respiratory system.

Ways to Cut Durock

Here are the methods you may use to slash your cement board:

Score and Snap the Thinner Sheet

Ways to Cut Durock

One of the simplest ways you may use to cut the board is to score the sheet. Then, you have to snap it along the cutting line. Next, you have to place your board flat. You have to make a line where you want to cut using a carpenter’s pencil.

Also, you should put a straight edge along the line. Then, pull either the scoring tool or drywall utility knife against it.

You have to repeat the whole process of slicing the board at least two to three times to make it even deeper. It will make the snapping quite easier.

Once done cutting the durock, you have to let it stand up and push your knee behind the line that you have scored.

The force you exert will make the part of the board to divide. Then, it will make the mesh of the fiberglass intact. Also, you can slash the joining mesh apart with your utility knife.

Use Your Power Tools


There are various power tools that you may use to slice the cement board. It will make a lot of dust, so you need to protect yourself using your respirator and goggles. To produce straight cuts, you have to utilize a circular saw with a carbide-tipped blade.

It will draw the saw into the board with moderate and equal pressure. Here’s a tip: you have to use a blade with a few teeth.

A saw with many teeth will get blocked down and make thick dust. When you use a few teeth of the blade, you can cut the durock quickly and smoothly.

Moreover, you may also cut the durock using an angle grinder that comes with a diamond cutting wheel.

However, the tool may give off a lot of dust. Also, it is harder to regulate than using the circular saw. Also, you can get a wet saw, which may cut tiles. The saw comes with an abrasive blade that has water. So, it cuts the tiles smoothly and without dust.

The next equipment you can use is a jigsaw with a metal or carbide-grit blade. You can try cutting the ¼ inch of the cement board with this tool. The saw will slice slowly but smoothly. Also, it will produce only a minimal amount of dust.

Slicing Round Holes

Slicing Round Holes

When you want to create holes in your durock so that it will fit in the toilet flange or tub faucet, you may use a few tricks in this process. A method you can use: sketch the outline of your hole onto the durock using a pencil compass.

Then, throw a ¼ inch masonry bit into the drill. Make a few closely spaced holes around the outline.

Then, get a hammer to tap the hole. After a couple of taps, the board will tear along the opening, and the circle will crack open. You have to clean the ragged edges with the plier or nipper.

Furthermore, you may cut the holes with a jigsaw that has a carbide-grit or metal-cutting blade.

When you use a jigsaw to slice a square or circle hole, you may begin by creating a hole through the cement board using a 3/8 inch drill bit. Then, you have to put the jigsaw blade into the crack and start cutting.

You need to remember that a jigsaw with carbide-grit or metal-cutting blade may give off larger round slices than just the regular straight cuts. So, you need to begin cutting a hole with a drill bit.

Then, you have to utilize the tool to extend it and carry on with the process. When using a jigsaw for the job, it is crucial that you first draw the board using a carpenter’s pencil.

That way, it will guide you all throughout the method. While slicing round holes with a jigsaw, the strategy will allow you to have more custom hole sizes.


The durability and strength of durock may make it an excellent choice for home improvements. However, they also make a difficult option when you want to manipulate it. But still, it is not impossible to use for your DIY projects.

All you need to do is to know the right tools to use and the best methods in cutting through the cement board. When you achieve all of these requirements, then you can snap the hard-rock material effortlessly.

Click Here to Leave a Comment Below 1 comments
MichelX - October 15, 2017

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