How to Install Composite Decking with Screws

How To Install Composite Decking With Screws

Composite decking has become a popular choice for homeowners due to its durability, low maintenance, and aesthetic appeal. However, proper installation is crucial to ensure the longevity of the deck. In this article, we will provide a step-by-step guide on how to install composite decking with screws.


Using the right screws is crucial for installing composite decking
Using the right screws is crucial for installing composite decking

Composite decking is made of a combination of wood fibers, plastic, and additives. It offers the look and feel of real wood without the maintenance required. Composite decking comes in different colors, textures, and sizes, making it a versatile option for any outdoor space. However, improper installation can lead to problems such as warping, buckling, and rotting.

Pre-installation Preparation

Before beginning the installation process, it’s essential to prepare the area properly. First, measure the area where the deck will be installed and calculate the materials needed. This includes the decking boards, screws, and other necessary components.

Next, gather the necessary tools and equipment such as a circular saw, drill, measuring tape, and level. Additionally, make sure the surface where the deck will be installed is clean, level, and free of any debris. This will ensure that the deck is installed smoothly and securely.

Choosing the Right Screws

When it comes to choosing screws for composite decking, it’s important to select the right type to ensure a secure and long-lasting installation. Stainless steel screws are recommended for composite decking due to their durability and resistance to rust and corrosion. Additionally, composite decking screws are designed with a special thread pattern that prevents the deck from buckling or warping.

Length and thickness considerations are also crucial when choosing screws. The length of the screw should be at least 1 inch longer than the thickness of the decking board. The thickness of the screw should be equal to or slightly less than the thickness of the decking board to ensure a tight fit.

Color-matching options are available to ensure that the screws blend in with the decking boards seamlessly. This is particularly important if the deck has a contrasting color scheme or if the screws will be visible. Composite decking screws are available in a range of colors, including brown, gray, and black.

Installing the First Board

The first board is crucial to the installation process as it sets the foundation for the rest of the deck. Start by positioning the first board in the corner of the deck and ensure that it is parallel to the house or other structure. Use a level to ensure that the board is level and adjust as necessary.

Once the first board is positioned correctly, secure it with screws. Make sure to drill pilot holes before screwing in the screws to prevent the board from splitting. Use two screws per joist, evenly spaced along the length of the board. Ensure that the screws are flush with the surface of the board to avoid tripping hazards.

Finally, ensure that the board is straight and even by checking it with a level. This will ensure that the rest of the boards are installed correctly and that the deck is level and secure.

Installing the Remaining Boards

Once the first board is securely installed, continue with the remaining boards. It’s essential to maintain proper spacing between the boards to allow for expansion and contraction. The recommended spacing is typically between 1/8 to 1/4 inch. To ensure even spacing, use spacers or create a temporary jig.

Secure each board with screws, ensuring that the screws are driven straight and flush with the surface of the board. Use the recommended length and thickness of screws for the specific type of composite decking being installed. If necessary, cut and fit the boards to the desired length using a circular saw.

Finishing Touches

After all the decking boards are installed, it’s time to add the finishing touches. Cover the screw heads with plugs or concealers that match the color of the decking. This will give the deck a clean, finished look.

It’s also crucial to clean and maintain the deck regularly to ensure its longevity. Composite decking requires minimal maintenance, but it’s still necessary to clean it periodically to remove dirt, debris, and stains. Use a mild detergent and a soft-bristle brush to clean the surface of the deck thoroughly.

Finally, conduct a final inspection and testing to ensure that the deck is installed correctly and securely. Walk around the deck and check for any loose boards or screws. Make any necessary adjustments before using the deck.


Installing composite decking with screws is a simple process that can be done by any homeowner with the right tools and preparation. Proper installation is crucial to ensure the longevity of the deck. Remember to measure and calculate the materials needed, gather the necessary tools and equipment, prepare the surface, choose the right screws, install the first board correctly, and complete the installation by securing the remaining boards and adding finishing touches. With these steps, you can enjoy a beautiful and long-lasting composite deck in your outdoor space.