How to Cut Composite Deck Boards

Are you looking to upgrade your outdoor living space with a durable, natural-looking deck? Consider adding composite deck boards to your entertaining outdoor area. Composite decking materials are durable and strong, making them suitable for all types of projects.

How to Cut Composite Deck Boards

Whether you’re constructing a poolside oasis or simply using composite decking materials to cover existing concrete steps or walls, this material is made from recycled wood fibers and plastic resins that can provide years of beauty and enjoyment with proper maintenance.

In this blog post, we’ll cover everything you need to know about how to cut composite deck boards. From the proper saw or blade to use during the installation process to the necessary precautions for safe operation, you’ll have all your questions answered so that you can get back outside enjoying your upgraded space in no time!

What Will You Need?

The first step in the process is to gather the necessary supplies to cut composite deck boards successfully. You’ll need the followings:

  1. Circular saw
  2. Clamps
  3. A blade designed for cutting composite deck boards
  4. Eye protection
  5. Dust mask
  6. Hearing protection
  7. Work gloves
  8. Protective clothing, such as long pants and a long-sleeved shirt

Once you’ve gathered the necessary supplies and put on your protective equipment, it’s time to start cutting.

10 Easy Steps on How to Cut Composite Deck Boards

Step 1. Measure the Area:

Carefully Measure and Mark the Area

Carefully measure and mark the area where you need to cut your composite deck board. You can use a pencil or chalk to mark the area. Cutting will be easier if you make a straight line with the measuring tape.

Step 2. Orient Your Saw:

Orient your saw so that the blade is perpendicular to your composite deck board, and make sure that the blade is positioned so that it will cut through the composite board, not against it. If you’re unsure how to orient your saw, consult the manufacturer. They can provide you with more specific instructions.

Step 3. Secure Your Board:

Once you’ve orientated your saw and blade, secure your board using clamps or a vise grip. This will help ensure that your cut will be accurate and precise. Be careful not to clamp too tightly, as this could damage the board.

Step 4. Adjust Depth Setting:

If you are using a circular saw, adjust the depth setting to match the thickness of your composite deck boards. You don’t want to go too deep! Because composite deck boards are thicker than regular wood, ensure that your saw blade’s teeth don’t extend too far below the board.

Step 5. Position Saw Guide on Line:

You can use a straight edge (such as a ruler) as a guide for your saw. Position the guide along your marked line and then adjust it so that the blade is lined up with your mark. Try to avoid wobbling the blade when you move it.

Step 6. Turn on Saw:

Once you’ve adjusted everything, turn on your saw and slowly start cutting through the board. Make sure to keep a steady hand and follow the guide as you cut. Because composite boards are made with plastic resins, you’ll want to apply light pressure as you cut in order to avoid burning the board.

Turn on Your Saw

Step 7. Cut in Sections:

If you have a large area to cut, it may be best to cut in sections rather than trying to do it all at once. This will help ensure accuracy while also reducing strain on the saw motor. Additionally, it will help reduce sawdust from becoming airborne.

Step 8. Stop Cutting Halfway Through:

After making the initial cut, stop halfway through and reposition the board. This will help make sure that the blade is cutting straight and accurately. Moreover, it will also help to reduce the chance of kickback.

Step 9. Check Your Cut:

Once you’ve finished cutting, inspect your work to ensure the cut is precise, smooth, and even. If any adjustments need to be made, make them before continuing with your project. Use sandpaper if needed to smooth the edges.

Step 10. Clean Up:

Always clean up after yourself when working with tools like a saw or other sharp objects. Be sure to wear appropriate gloves while cleaning up any dust or debris created during the process of cutting composite deck boards! If you are using a circular saw, be sure to unplug the unit before cleaning up.

With these easy steps in mind, you can now confidently tackle cut composite deck boards for your next outdoor renovation project! By taking the necessary precautions and following these instructions, you can ensure your project will succeed. So get out there and start enjoying your outdoor space!

Wear Appropriate Gloves While Cleaning Up

5 Additional Tips and Tricks

  1. Always use a sharp blade for clean, smooth cuts. A dull blade can cause splintering and create an uneven finish to your deck boards.
  2. To ensure a uniform cut for multiple deck boards, mark the exact length with a piece of chalk or a straight edge before cutting.
  3. Wear protective gear such as gloves and safety glasses when cutting composite deck boards to protect yourself from potential injuries.
  4. Use clamps to secure the board in place when cutting. This will make your cuts more accurate and reduce kickback during the sawing process.
  5. For intricate cuts like notches, consider using an oscillating tool which is ideal for making precision cuts without damaging the board.

Finally, always follow manufacturer instructions when using any type of saw or tools on composite decks so that you can achieve professional results!

5 Things You Should Avoid

  1. Do not use a saw with a dull blade. A dull blade will create more friction, leading to uneven and jagged cuts.
  2. Avoid cutting too deep or too hard, as this may cause the board to break apart or splinter.
  3. It is important to avoid using nails when attaching composite boards together, as these can cause damage that is difficult to patch up afterward.
  4. Avoid using traditional woodworking tools such as chisels on your composite decking boards – they are designed for working with wood, not plastic composites!
  5. Finally, make sure to avoid cutting in wet weather conditions – the moisture will affect how well your cut lines stay straight and how clean your finished product looks. Working in dry conditions is the best way to ensure a smooth cut and professional-looking result.

If you follow these five tips, you’ll be sure to have great results when cutting composite deck boards. Just remember to use sharp blades, take your time, and avoid working in wet conditions.

What is the Best Saw to Cut Composite Decking?

The best saw to use when cutting composite decking is a circular saw with a carbide-tipped blade. This type of saw is ideal for cutting through tough plastic material without causing splintering or damaging the board in any way.

If you want to make intricate cuts, consider using an oscillating tool that allows for precision cutting without damaging the board. Whichever type of saw you choose, just remember always to wear protective gear, such as gloves and safety glasses, when working with tools on your composite deck!

By following these tips and tricks, you’ll be sure to have professional-looking results when it comes time to cut your composite deck boards.

How Do You Cut the Edges of a Composite Deck?

Cutting the edges of a composite deck is best done with a circular saw. Start by measuring where you need to cut, then use a straight edge to ensure your lines are in the right spot before cutting.

Next, clamp the board down securely so that it does not move during the cutting process. Now, with your protective gear on, begin sawing along the line you have marked out. Make sure to go slowly and apply even pressure throughout the cut for clean results.

If you want to create nice curved edges or intricate shapes, consider using an oscillating tool that will allow you to make precision cuts without damaging the board. Follow these steps, and you’ll be sure to have great-looking results when cutting the edges of your composite deck.

Done With a Circular Saw


In conclusion, learning how to cut composite deck boards can be overwhelmingly beneficial. Not only will you end up with a deck that looks new and is properly fitted into the space in which you want it, but it can also save you considerable time and money in the long run. The tools needed for the job, such as a circular saw, a drill, and wood screws, are fairly easy to come by, making the task more achievable.

Also, do not forget to wear proper protective gear, such as goggles, when dealing with wood since flying wood chips may cause permanent eye damage if left unprotected. With these useful tips and steps in mind, your new composite deck boards will be easily installed!

Hopefully, this article has provided enough information to help you start cutting composite deck boards. Thanks for reading!

You Can Check It Out to Clean Redwood Deck

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Adrian Green

Adrian has been interested in woodworking since he was a child. His father had a woodworking shop, and Adrian would help him out and learn from him. He gained basic carpentry knowledge as well as an understanding of how to work hard and take care of business. He enjoys woodworking as a hobby. He loves the feeling of creating something with his own hands, and the satisfaction that comes from seeing his finished products used by others. So he started this blog to spread his passion and knowledge to those interested in DIY wood-working projects. He knows that with a little guidance and practice, anyone can create beautiful pieces of furniture or décor from scratch.

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