Welcome to our step-by-step guide on installing WPC Composite Decking, an essential read for anyone looking to enhance their outdoor space with the latest in decking technology. In this guide, we’ll walk you through the entire installation process, from choosing the right tools and materials to laying down your decking boards for optimal durability and aesthetic appeal. WPC Composite Decking is renowned for its high resistance, minimal colour fading, and a beautiful wood brushing effect, making it a superior choice for outdoor decking. Whether you’re a DIY enthusiast or a professional installer, this guide will provide you with all the information you need to ensure a successful and long-lasting installation. Let’s get started on transforming your outdoor area into a stunning and functional space.
Ground Preparation
- Assessment and Cleaning: Thoroughly inspect the area for flatness and stability. Remove all weeds and debris to ensure a clean base. For weed prevention, lay a root-stop fabric across the area.
- Slope for Drainage: Confirm a slight slope, ideally around 2%, to facilitate water drainage away from the decking, which is crucial for preventing water damage.
Laying and Fixing Joists
- Joist Spacing: Arrange the joists with a maximum gap of 400mm between their centers, reducing to 300mm for enhanced support. Ensure the use of double joists at points where two decking boards meet to prevent potential board movement or shrinkage.
- Joist Placement: For larger decks, you can lay the joists directly on a substantial concrete base. In standard installations, secure the joists to the concrete using expansion screws. Employ 2-3 joist fitters per meter of joist, spacing them 30-40cm apart to provide a solid base for the decking.
- Level Adjustment: After fixing the joists, check their level. Any unevenness can be corrected by placing small shims between the joist and the ground. This step ensures a perfectly flat surface for the decking boards and is essential for preventing water pooling and the associated board issues.
Deck Board Installation
- Starting Board: Begin with the installation of the first board using starting clips or side screws, maintaining a 10mm gap from any boundaries for expansion. This gap is crucial for drainage and ventilation.
- Board Attachment: Attach subsequent boards using clips or screws in sequence, ensuring a uniform gap between boards to allow for expansion. This gap should be adjusted based on the deck length and local temperature variations, with a minimum of 1mm recommended.
- Expansion and Contraction: Account for the WPC products’ expansion rate of 0.3% to 0.5% by maintaining appropriate gaps between boards. Use the provided formula to calculate the exact gap needed based on the maximum temperature in your area and the installation temperature.
Finishing Touches
- Edge Covering: Depending on site requirements and aesthetics, you may opt for uncovered edges or finish them with L-shaped aluminium or WPC covers for a refined look. When using WPC material for edge covering, ensure a 10mm gap for expansion.
- Cover Installation: For aluminium or WPC covers, lay the covering over the deck edge, mark drill points, pre-drill holes, and then secure the cover.
To ensure the longevity and maintain the appearance of your WPC composite decking, it’s essential to follow these care and cleaning recommendations:
General Maintenance
- Dirt and Debris: Regularly sweep your deck to remove dirt and debris. For more stubborn dirt, clean the deck with soap and hot water. For tougher stains, a stiff bristle brush can be used.
- Water Stains: Newly installed decks might show water stains after rain, which occur due to water evaporation. These are temporary and should fade within 1-2 months. If necessary, gently wiping the surface with steel wool can help accelerate this process.
Addressing Stains and Scratches
- Oil, Grease, and Food Stains: Spills should be cleaned promptly with warm soapy water and a sponge to prevent staining. For more persistent stains, steel wool or fine-grit sandpaper may be gently used.
- Minor Scratches: Minor scratches can often blend into the deck’s finish over time. If necessary, lightly sand the area in the direction of the grain to reduce visibility.
Dealing with Snow and Ice
- Snow and Ice Removal: Use rock salt or a calcium-chloride based product to melt snow and ice. Clear the slush with a plastic shovel. Avoid metal tools, as they can scratch the decking surface.
Using a Pressure Washer
- Pressure Washing: If using a pressure washer, maintain a minimum distance of 30cm from the decking surface to prevent damage. Always use a fan tip nozzle and spray in the direction of the decking boards to avoid lifting or damaging the deck surface.
Mold and Mildew
- Prevention and Cleaning: Ensure good drainage and ventilation to prevent mold and mildew growth. If mold occurs, remove any surrounding organic material and clean the deck with warm soapy water using a soft brush.
Disposal
- Responsible Disposal: Dispose of any decking waste with normal construction debris or household waste. Do not burn WPC decking, as it can release harmful chemicals.
As we conclude our comprehensive guide on WPC Composite Decking installation, we hope you feel equipped and inspired to embark on your decking project. The transformative power of a well-installed composite deck can’t be overstated—it not only enhances the aesthetic appeal of your outdoor space but also offers a durable, low-maintenance solution for years of enjoyment. This guide together with illustration images is available to download here.
For those ready to take the next step, we invite you to explore Wood and Beyond’s extensive range of WPC composite decking. Our selection is designed to cater to a variety of tastes and requirements, ensuring you find the perfect match for your outdoor space. Whether you’re drawn to the classic charm of wood grain textures or the sleek sophistication of modern designs, our collection has something for everyone.
Visit us to discover the full spectrum of options available, and let us help you transform your outdoor area into a stunning, inviting extension of your home. With Wood and Beyond’s WPC composite decking, the outdoor living space of your dreams is just a project away.
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FAQ
How should I prepare the ground before installing WPC decking?
To ensure a solid foundation for WPC decking, the ground should be flat and stable. Clear the area of any weeds or debris, and consider using a root-stop fabric to prevent future weed growth. A slight slope (about 2%) is also recommended to aid water drainage and protect the decking from water damage.
What is the recommended spacing for joists when installing WPC decking?
Joists should be placed with a maximum spacing of 400mm between their centers. For added stability, especially where two decking boards meet, it’s advisable to use double joists. This helps prevent board movement and potential gaps.
How can I ensure my decking surface is level?
After laying and securing the joists, it’s important to check their level. Any discrepancies can be adjusted by placing shims between the joist and the ground, ensuring a flat and stable surface for the decking boards.
What should I consider when attaching the deck boards?
Start by securing the first board with starting clips or screws, leaving a 10mm gap for expansion. As you attach subsequent boards, maintain a uniform gap between them to accommodate expansion and contraction. This gap varies with deck length and temperature changes, but a minimum of 1mm is recommended.
How do I finish the edges of my WPC deck?
The finishing of deck edges depends on your aesthetic preferences and site requirements. You may leave the edges uncovered or opt for L-shaped aluminium or WPC covers for a polished look. When using WPC material for edge covering, remember to allow for a 10mm expansion gap.