Our Guide to Installing Composite Decking
Composite decking offers a durable and low maintenance alternative to traditional timber decks. Made from a mix of wood fibres, plastics, and bonding agents, composite boards are resistant to rot, damp, fading, warping, and cracking. If you’re planning to install composite decking, it’s important to consider the layout, ground conditions, sun exposure, and drainage.
Key Takeaways:
- Composite decking provides a durable and low maintenance solution for outdoor spaces.
- Proper planning and preparation are essential for a successful installation.
- Acclimatize the boards on-site for at least 72 hours before installation.
- Use the correct fasteners and screws designed for composite decking.
- Wear protective clothing and dispose of offcuts safely.
Where to Lay Composite Decking
When planning the location for your composite decking, several factors should be considered to ensure a successful installation. These factors include the dryness and levelness of the ground, the amount of sunlight the decking will receive, and the desired level of privacy.
If you plan to build the decking next to a house, it’s crucial to ensure that it is below the damp-proof course and doesn’t cover air bricks. This will prevent moisture from seeping into the house and maintain proper ventilation. Additionally, the decking should have a 1:100 fall away from the house to ensure proper drainage and prevent water from pooling.
When it comes to the layout of the composite decking, you have some flexibility, but it’s recommended to plan for whole boards whenever possible. This will help minimize cutting and wastage, resulting in a more efficient and visually appealing installation.
To better understand the important location considerations, refer to the table below:
| Location Considerations | Important Factors |
|---|---|
| Dryness of the Ground | Ensure the ground is sufficiently dry to prevent moisture-related issues. |
| Levelness of the Ground | The ground should be even to ensure a stable and balanced decking structure. |
| Amount of Sunlight | Consider the position of the decking in relation to sunlight exposure throughout the day. |
| Privacy | Take into account the desired level of privacy when choosing the location for the decking. |
By carefully considering these location factors, you can create an ideal setting for your composite decking, ensuring its longevity and enhancing the overall outdoor experience.
Is Composite Decking Easy to Install?
Installing composite decking is a straightforward process that can be easily accomplished with the right preparation and tools. By following the recommended composite decking installation guide and tips, you can achieve a professional-looking deck that adds beauty and functionality to your outdoor space.
Planning and Preparation
Before you start installing your composite decking, it’s crucial to plan the layout accurately. Consider the size and shape of your deck, the desired location, and the direction of the boards. Take measurements and calculate the number of materials needed, including deck boards, fasteners, and screws.
Ensure you have a solid timber frame as a base for the deck. The frame should be structurally sound, level, and securely anchored to the ground. If needed, make any necessary repairs or modifications to the existing structure before proceeding with the installation.
Acclimatization
Composite decking boards can expand and contract with changes in temperature and humidity. To minimize the risk of warping or buckling, it’s essential to acclimatize the boards on-site for at least 72 hours prior to installation. This allows the boards to adjust to the surrounding environment.
Installation Process
Follow these steps for a successful composite decking installation:
- Start by securing the first deck board to the frame, making sure it is aligned properly and sits flush with the frame.
- Use specific fasteners and screws designed for composite decking to attach the boards to the frame. These fasteners are typically hidden, providing a seamless look.
- Continue installing the remaining boards, ensuring they are evenly spaced and securely fastened to the frame.
- Use a saw or a cutting tool to trim the boards to the desired length, if needed. Treat all cut surfaces with a preservative to protect against moisture and decay.
During the installation process, it’s important to prioritize safety. Wear protective clothing, such as gloves and safety glasses, when handling and cutting the decking boards. Dispose of any offcuts properly to maintain a clean and safe work area.
| Tools: | Materials: |
|---|---|
| Measuring tape | Composite decking boards |
| Level | Fasteners |
| Saw or cutting tool | Screws |
| Drill | Preservative |
With careful planning, precise installation techniques, and attention to detail, installing composite decking can be a rewarding project that enhances your outdoor living space. Enjoy the beauty and benefits of composite decking for years to come.
Ground Preparation for Composite Decking
Before installing your composite deck, it’s crucial to properly prepare the ground to ensure a solid foundation for your project. Whether you’re building on a patio, concrete foundation, roof terrace, balcony, or soft/uneven ground, the ground preparation process will vary.
Building on a Solid Surface
If you’re building on a patio or concrete foundation, the good news is that you can lay the decking frame directly on top. This simplifies the installation process and saves time and effort. Just make sure that the surface is level and stable before proceeding.
Building on a Roof Terrace or Balcony
For those constructing a composite deck on a roof terrace or balcony, it’s important to protect the waterproof membrane underneath. To do this, raise the decking frame on pedestals. This elevation will prevent moisture from seeping through and damaging the underlying structure.
Building on Soft or Uneven Ground
Constructing a composite deck on soft or uneven ground requires a different approach. In this case, it’s advisable to install a network of posts that will serve as a stable and level base for the decking frame. The placement of these posts should ensure proper weight distribution and minimize any potential for sagging or unevenness.
Choosing the Right Materials
When preparing the ground for your composite deck, it’s essential to choose the right materials for the decking frame. Composite joists or pressure-treated wood are recommended for their durability and longevity. These materials will provide a sturdy foundation that will support the weight of the deck and withstand the elements over time.
By taking the time to properly prepare the ground, you’ll ensure that your composite deck installation goes smoothly and leaves you with a beautiful and long-lasting outdoor space.
| Building Surface | Ground Preparation Process |
|---|---|
| Solid Surface (Patio or Concrete Foundation) | Lay the decking frame directly on top. Ensure the surface is level and stable. |
| Roof Terrace or Balcony | Raise the decking frame on pedestals to protect the waterproof membrane underneath. |
| Soft or Uneven Ground | Install a network of posts to create a solid and level base for the decking frame. |
Building the Frame for Composite Decking
Building a sturdy frame is crucial for the success of your composite decking installation. The frame serves as the foundation for your deck, providing support and stability. To ensure a strong and durable frame, follow these steps:
1. Spacing the Joists
When building the frame, it’s important to space the joists evenly to provide proper support for the decking boards. For residential use, the joists are typically spaced 16 inches apart. This spacing helps distribute the weight evenly across the frame, preventing sagging and warping over time.
2. Consider Joist Thickness
When selecting joists for your composite decking frame, consider the thickness of the joists. Thicker joists offer added stability and support, especially for heavy-duty applications or areas with high foot traffic. Consult the manufacturer’s guidelines to determine the appropriate joist thickness for your specific decking boards.
3. Secure the Frame
There are multiple ways to secure the frame for your composite decking. You can screw the joists together using decking screws or use post or pedestal networks to fasten the frame to the ground. Securing the frame properly ensures that it remains stable and in place during use.
4. Spacing and Oversizing Bolt Holes
Allowing for expansion and contraction is important when building the frame. To accommodate these natural movements, ensure proper spacing between the decking boards and oversize the bolt holes. This allows the boards to expand and contract without causing damage to the frame or compromising the deck’s structure.
5. Cemented Posts
If you choose to use posts for additional support, it’s crucial to properly install them. Cementing the posts into the ground ensures a solid foundation. Make sure to bury the posts at least 500mm below the surface to provide sufficient stability and prevent shifting over time.
| Steps | Description |
|---|---|
| Spacing the Joists | Space the joists evenly, typically 16 inches apart for residential use. |
| Consider Joist Thickness | Choose joists with an appropriate thickness for added stability and support. |
| Secure the Frame | Secure the joists together or fasten the frame to the ground using post or pedestal networks. |
| Spacing and Oversizing Bolt Holes | Ensure proper spacing between decking boards and oversize bolt holes for expansion and contraction. |
| Cemented Posts | If using posts, cement them into the ground with a depth of at least 500mm for stability. |
By following these guidelines, you can build a solid frame for your composite decking, ensuring a sturdy and long-lasting outdoor space. With a well-constructed frame, you can enjoy the beauty and durability of composite decking for years to come.
Laying Composite Decking Boards
To lay composite decking boards, you’ll need to follow a few simple steps that ensure a secure and visually appealing installation. Here’s a guide on how to install composite decking boards:
- Start by positioning starter clips at each end of the frame and at regular intervals in between. These clips will hold the first board in place. Securely screw the starter clips into the frame.
- Slide the first decking board onto the starter clips, making sure it fits tightly. This ensures stability and prevents any movement.
- Next, install special clips at the exposed side grooves of the first board. These clips will secure the subsequent boards and provide a uniform look. Screw the clips into both the board and the joists of the frame.
- Place the following boards against the special clips of the previous board, using light force to connect them securely. This allows the boards to interlock and creates a seamless appearance.
- Continue this process, adding boards one by one, until you reach the last two boards that need to be installed.
By following these steps, you’ll be able to lay composite decking boards efficiently and achieve a professional-looking result.
Installing the Final Two Boards
Installing the final two boards is a critical step in finishing your composite decking installation. To ensure a smooth and seamless finish, follow these steps:
- Step 1: For the outer edge of the last board, secure hidden starter clips at each end of the frame. These clips will provide a secure and concealed attachment point for the board.
- Step 2: Slide the last decking board onto the hidden starter clips, making sure it fits tightly against the frame. This will give your decking a polished look while maintaining stability.
- Step 3: Now, it’s time to install the penultimate board. Push one length of it against the exposed special clips of the final board. This will ensure a secure connection between the two boards.
- Step 4: Slide the required number of hidden fasteners between the second-to-last and third-to-last boards. These fasteners will provide additional support and stability to your decking.
- Step 5: Secure the hidden fasteners to the joists, ensuring a secure and reliable attachment.
- Alternatively: If you’re using 3mm hidden fasteners, you can screw the bottom edge of the last board at an angle to the joist at specific intervals. This will create a secure connection between the board and the frame.
By following these steps, you can ensure that the final two boards of your composite decking installation are properly installed, providing a flawless and professional finish to your outdoor space.
Adding Fascia Finish
To give your composite decking a polished and finished look, adding composite fascia is a great option. The fascia covers the exposed frame, creating a seamless and sleek appearance for your deck. Here’s how you can add the fascia finish:
- Cut the fascia pieces: Measure and cut the composite fascia boards to the appropriate size. Make sure they align with the width and length of your decking.
- Secure the fascia: Place the fascia pieces onto the ends of the deck frame. Make sure they are aligned properly and positioned at regular intervals along the joists.
- Screw it into place: Use screws specifically designed for composite decking to secure the fascia boards onto the frame. Make sure to choose screws that are suitable for the material of your fascia and frame.
By adding the fascia finish, you not only enhance the visual appeal of your composite decking but also protect the exposed frame from the elements. It gives your deck a clean and professional look, making it the perfect finishing touch for your outdoor space.
Benefits of Adding Fascia Finish
The fascia finish offers several benefits for your composite decking:
- Enhanced aesthetics: The fascia provides a clean and polished finish, giving your deck a refined look.
- Protection for the frame: By covering the exposed frame with fascia, you protect it from moisture, pests, and other potential damages.
- Added durability: The fascia adds an extra layer of protection to the deck, increasing its overall longevity.
- Concealed fasteners: The fascia helps in hiding the screws or fasteners used for the deck installation, resulting in a seamless and visually appealing surface.
By following these steps and adding the fascia finish, you can transform your composite decking into a stunning outdoor space. It’s the perfect way to add those finishing touches that take your deck to the next level.
Conclusion
Installing composite decking provides a sustainable and low maintenance solution for your outdoor spaces. With its durability and resistance to rot and fading, composite decking eliminates the need for frequent sealing or painting. By properly planning the layout, preparing the ground, and constructing a solid frame, you can ensure a successful installation that will stand the test of time. Following the recommended installation steps, including acclimatizing the boards and using the correct fasteners, will result in a professional and long-lasting composite decking installation.
Final Thoughts on Installing Composite Decking
- Composite decking offers a durable and low maintenance alternative to traditional timber decking.
- Proper planning is essential for the layout, ground conditions, and sun exposure of your decking.
- Ground preparation is crucial, whether building on a solid surface, uneven ground, or a roof terrace.
- A sturdy frame construction ensures stability and longevity for your composite decking.
- Acclimatizing the boards and using the correct fasteners are key steps for a successful installation.
By following these guidelines, you can confidently install composite decking that will enhance the beauty and functionality of your outdoor space for years to come.
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Tips for Installing Composite Decking
When embarking on your composite decking installation journey, there are a few tips to keep in mind to ensure a successful and long-lasting outcome.
Firstly, consider the ground conditions and sun exposure when planning the layout of your deck. This will help you determine the best positioning for optimal functionality and aesthetics.
Secondly, it’s crucial to acclimatize the composite boards on-site for at least 72 hours prior to installation. This allows the boards to adjust to the local climate, reducing the risk of warping or buckling over time.
Additionally, make sure to use structural treated timber and screws specifically designed for composite decking installation. This will ensure a sturdy and secure foundation for your deck, enhancing its structural integrity.
To enhance the longevity of your composite deck, treat all cut surfaces with preservative. This step helps protect the exposed edges from moisture penetration, minimizing the risk of rot or decay.
Remember to prioritize safety throughout the installation process. Wear appropriate protective clothing to safeguard yourself from any potential hazards. Dispose of offcuts responsibly to maintain a clean and organized work area.
Proper ground preparation is key to a successful installation. Whether you’re building on a solid surface or uneven ground, ensure you follow the recommended guidelines. Consider using posts or pedestals for stability and adjustability, especially on uneven terrain.
When constructing the frame, it’s important to adhere to the recommended guidelines for stability. Proper spacing and secure fastening techniques will ensure a sturdy and durable deck structure.
Use starter clips and hidden fasteners to secure the composite deck boards. These accessories provide a seamless and professional finish, while also allowing for natural expansion and contraction of the boards.
For that final touch of elegance, consider adding a fascia finish. This will cover the exposed frame and create a clean and polished appearance to your composite decking.
By following these tips and guidelines, you’ll be well on your way to installing a beautiful and resilient composite deck that will provide years of enjoyment for you and your family.
FAQ
Where should I lay composite decking?
When planning the location for your composite decking, consider the dryness and levelness of the ground, the amount of sunlight it will receive, and the desired privacy. If building next to a house, ensure it is below the damp-proof course and doesn’t cover air bricks. The decking should have a 1:100 fall away from the house.
Is composite decking easy to install?
Yes, installing composite decking is relatively easy if you have planned the layout accurately and have a solid timber frame as a base. The deck boards are fastened to the frame using specific fasteners and screws. It’s important to acclimatize the boards on-site for at least 72 hours prior to installation and to follow safety measures during the installation process.
How do I prepare the ground for composite decking?
Before installing a composite deck, proper ground preparation is essential. If building on a solid surface like a patio or concrete foundation, the decking frame can be laid directly on top. If building on a roof terrace or balcony, the frame should be raised on pedestals to protect the waterproof membrane. If building on soft or uneven ground, a network of posts should be installed to provide a solid and level base for the decking frame. It’s recommended to use composite joists or pressure-treated wood for the frame’s longevity.
How do I build the frame for composite decking?
Building a sturdy frame is crucial for the success of a composite decking installation. The frame should be spaced evenly with joists, typically 16 inches apart for residential use. The thickness of the joists should be taken into consideration for added stability. The frame can be secured by screwing the joists together or by fastening it to the ground using post or pedestal networks. Proper spacing and oversizing of bolt holes should be ensured for expansion, and cemented posts should be buried at least 500mm below the surface.
How do I lay composite decking boards?
To lay composite decking boards, start by positioning starter clips at each end of the frame and at regular intervals in between. Securely screw the starter clips into the frame. Slide the first decking board onto the starter clips, ensuring a tight fit. Install special clips at the exposed side grooves of the first board and screw them into the board and the frame’s joists. Place the following boards against the special clips of the previous board, using light force to connect them securely. Repeat this process until the final two boards are left to be installed.
How do I install the final two boards?
Installing the final two boards requires special care to ensure a smooth finish. For the outer edge of the last board, secure hidden starter clips at each end of the frame and slide the last decking board onto them. Install the penultimate board by pushing one length of it against the exposed special clips of the final board. Slide the required number of hidden fasteners between the 2nd and 3rd last boards. Secure these fasteners to the joists. Alternatively, if using 3mm hidden fasteners, screw the bottom edge of the last board at an angle to the joist at specific intervals.
How do I add a fascia finish to composite decking?
To give the decking a polished finish, composite fascia can be added to cover the exposed frame. Cut the fascia pieces to size and screw them onto the ends of the frame at regular joist intervals. This will create a flush and sleek appearance for the composite decking.
What are some tips for installing composite decking?
Here are some tips for installing composite decking: consider ground conditions and sun exposure when planning the decking layout, acclimatize the boards on-site, use structural treated timber and specific screws, treat cut surfaces with preservative, wear protective clothing, dispose of offcuts correctly, follow safety measures, prepare the ground properly, build a sturdy frame, use starter clips and hidden fasteners to secure the deck boards, and add a fascia finish for a polished appearance.