If you’re ready to transform your backyard into a stunning haven, this how to install composite decking guide will walk you through the entire process of installing your deck, from planning and design to the final touches. Let’s get started already!
Composite decking has become a popular choice for homeowners looking to create a beautiful and low-maintenance outdoor living space. Unlike traditional wood decks, it offers a number of advantages, including durability, weather resistance, and minimal upkeep.
Planning Your Perfect Deck
Before going into the details of the construction phases, it’s crucial to plan your dream composite decking install. Here are some key considerations:
- Deck Size and Layout: Determine the size and layout of your deck based on your available space and intended use. Will it be a small patio for intimate gatherings or a larger space for entertaining? Consider traffic flow, furniture placement, and access points to your home.
- Design and Style: Choose a design that complements the architectural style of your home and your personal taste. Explore different shapes, such as L-shaped, rectangular, or multi-level decks. Consider incorporating features like built-in planters, benches, or a railing with a unique design.
- Colour Options: Composite materials come in a wide variety of colours, from classic wood tones like brown and cedar to contemporary options like grey and black composite decking. Think about the overall aesthetics of your yard and choose a colour that blends seamlessly or creates a desired contrast.
- Permits and Regulations: Check with your local building department to determine if permits are required for your deck project. Certain regulations may exist regarding deck size, height, and setbacks from property lines.
Choosing the Right Composite Decking Material
Once you have finalised your design, it’s time to select the perfect material for your project. There are several factors to consider when choosing a material:
- Durability: Different composite decking materials offer different degrees of strength and resistance to wear and tear. Opt for a material that can withstand the climate in your region and the intended use.
- Warranty: Look for a product with a strong warranty that covers material defects and fading.
- Maintenance Needs: While composite requires minimal maintenance compared to wood, some options require more composite decking cleaning or periodic staining. Assess your preferred level of upkeep before choosing a material.
- Cost: The prices can vary based on the material, brand, and features. Set a realistic budget and compare options to find the best value for your needs.
A Closer Look at Popular Colour Options
- Black Option: This offers a sleek and modern aesthetic. It can create a dramatic statement in your backyard, especially when paired with contrasting light-coloured walls or furniture. However, keep in mind that black surfaces tend to absorb more heat, so consider this factor if you live in a hot climate.
- Grey Option: Grey composite decking provides a versatile and sophisticated look. It complements a wide variety of architectural styles and can blend seamlessly with natural elements in your landscape. Grey comes in various shades from light, cool-toned greys to warmer charcoal tones. Choose a shade that matches your desired aesthetics.
What Tools and Materials Do You Need for Installation?
Before starting construction, gather all necessary tools and materials. Your specific needs may vary based on your deck design, but here’s a general checklist for you:
Tools:
- Circular Saw
- Miter Saw
- Jigsaw
- Drill with assorted drill bits
- Tape measure
- Level
- Speed square
- Rubber mallet
- Pencil
- Bar clamps
- Chalk line
Materials:
- Composite decking boards: Get enough to cover your desired deck area.
- Fascia boards (if applicable)
- Ledge board: Choose pressure-treated lumber for attaching the deck to your house.
- Deck joists: Choose pressure-treated lumber for supporting the decking boards.
- Deck screws: Consider colour-matched to your decking.
- Universal fasteners: These are optional but recommended for a cleaner look.
- Breaker boards: These are optional but are necessary for wider decks or creating separate sections.
- Concrete anchors: These are for attaching the ledger board to your house.
- Post anchors: These are necessary for attaching deck posts to footings.
Additional Materials Depending on Your Design:
- Stair stringers and treads if your deck includes stairs.
- Railing posts, balusters, and handrails.
- Deck lighting: This is optional.
- Skirting materials: These are optional but necessary if you want to enclose the underside of the deck.
Step-by-Step Guide to Install Your Composite Decking
Now that you have your plan, materials, and tools, it’s time to build your deck! This guide provides a general overview of the installation process. Always follow the specific instructions provided by the manufacturer of your chosen composite materials. Additionally, consider consulting a professional contractor if you’re unfamiliar with deck construction or have a complex design in mind. Having said that, let’s get your hands dirty!
Building the Substructure
The substructure is the backbone of your construction. It’s important to construct it correctly to ensure the stability and longevity of your outdoor space.
- Step 1: Lay out the Foundation: Mark the perimeter of your deck area using stakes and string. Dig the area to remove vegetation or debris, ensuring a level base for the substructure.
- Step 2: Install the Support Posts: Depending on the height of your deck, you may need to install support posts in concrete footings. Space the posts evenly, typically 6 to 8 feet apart, and ensure they are level and plumb.
- Step 3: Construct the Frame: Attach the ledger board to your house (if applicable) and ensure it is securely fastened and level. Build the outer frame of the deck using pressure-treated wood, and connect it to the support posts. Next, install the interior joists, spacing them 12 to 16 inches apart, depending on the manufacturer’s recommendations.
- Step 4: Check for Level and Square: Use a level to ensure the frame is even and a square to verify that all corners are 90 degrees.
Laying the Decking Boards
With the substructure complete, you can begin installing the composite decking boards. This phase requires precision to ensure a professional-looking finish.
- Step 1: Position the First Deck Board: Start at one end of the deck, usually along the house. Place the first board and ensure it is aligned with the edge of the deck and overhangs the fascia by about ¾ inch.
- Step 2: Cut Notches for Posts: If your deck has posts, use a speed square and pencil to mark the board where it needs to be notched. Cut the notches using a jigsaw, then place the board back on the deck frame.
- Step 3: Fasten the First Deck Board: Pre-drill holes for the fasteners using a 1/8-inch wood drill bit. This helps to prevent splitting. Secure the board to the frame with composite deck screws, and ensure the screws are flush with the surface. Continue this process for each board, checking alignment regularly.
Installing Hidden Fasteners
For a seamless, clean look, use hidden fasteners. These create uniform spacing between boards and eliminate visible screws.
- Step 1: Insert the Fasteners: After positioning the first board, slide a hidden fastener into the groove along the side of the board. Secure the fastener to the joist using a drill. The fasteners should be installed at every joist location.
- Step 2: Install Subsequent Boards: Slide the next deck board into place, and ensure it is tightly against the fasteners. Continue installing fasteners and boards until the deck is complete.
- Step 3: Install the Final Board: The final board, which usually sits against the house, may require angling to fit between the house and the existing boards. Use a pry bar to tighten the board against the fasteners, then secure it with surface screws or plugs.
Installing Breaker Boards
Breaker boards are used to break up the layout of the deck to create distinct sections. This is particularly important for large decks or when using contrasting colours, such as black composite alongside grey composite material.
- Step 1: Cut and Position the Breaker Boards: Measure and cut the breaker boards to fit between the deck boards. Allow for a slight overhang that can be trimmed later. Snap a chalk line along the deck to guide where the breaker boards will be installed.
- Step 2: Install the Breaker Boards: Position the breaker boards along the chalk line, and ensure they are evenly spaced and aligned with the deck design. Secure the breaker boards to the frame using composite deck screws or hidden fasteners.
- Step 3: Trim the Overhang: Once the breaker boards are in place, use a circular saw to trim any excess material, ensuring a uniform edge.
Final Touches and Inspection
With the decking installed, it’s time to add the finishing touches and inspect your work.
- Step 1: Install Fascia and Trim: Attach fascia boards along the sides of the deck to cover the substructure and create a polished look. If desired, add trim pieces around the perimeter of the deck for a more finished appearance.
- Step 2: Inspect the Deck: Walk the entire deck to check for any loose boards or fasteners. Ensure all fasteners are flush with the deck surface and that there are no gaps between boards.
- Step 3: Sweep the Deck: Remove any debris from the installation process. Wash the deck with a mild soap and water solution to remove any dirt or dust.
Maintaining Your Composite Deck
One of the significant benefits of composite decking is its low maintenance needs. However, regular care is essential to keep your deck looking its best.
- Routine Cleaning: Clean your deck periodically with a hose and a soft brush to remove dirt and debris. Use a composite deck cleaner for tougher stains, ensuring you follow the manufacturer’s instructions.
- Mold and Mildew Prevention: Ensure your deck has proper drainage and airflow to prevent moisture buildup. If mould or mildew appears, clean it promptly with a composite-safe cleaner.
- Avoid Scratches and Damage: Place protective pads under furniture legs to prevent scratching the deck surface. Avoid dragging heavy objects across the deck, as this can cause damage.
Conclusion
Installing composite decking is an excellent way to enhance your outdoor living space, offering a durable, low-maintenance solution that will last for years. Whether you choose grey for a modern look or black composite decking for a timeless appeal, following the steps outlined in this guide will help you achieve a flawless installation.
