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What Is The Correct Way To Lay Deck Boards

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  • 31-01-2024
What Is The Correct Way To Lay Deck Boards

 Make A Frame Where You Want To Lay The Deck

Building a sturdy foundation is the first step in ensuring you lay deck boards correctly. Begin by choosing the area in your garden where you plan to install the decking. Clear the area of any debris, grass, or plants, so you have a clean surface to work on. Next, use treated timber to construct a frame that matches the size and design you need. Ensure that the frame is level by using a spirit level, adjusting it as you go. This initial structure is crucial as it forms the base on which you will lay the decking boards.

Once the frame is in place, secure it with screws or nails, ensuring each corner is tightly fixed. Double-check that the frame is stable and level, as any unevenness will affect the quality of the decking. A well-constructed frame is vital for the longevity and stability of your deck. When the base is properly set, laying the decking boards becomes straightforward. The boards will lie flat and uniform, reducing the chances of wobbling or warping. Measure and cut the boards to fit the frame, and secure them using screws. Following these steps will make the process of laying deck boards much easier.

 Lay The Joists Inside The Frame & Nail Them In Place

Once the frame is in place, the next step is to install the joists. Joists are essential for supporting the decking boards and creating a stable platform. 

Begin by laying the joists inside the wooden frame. Space the joists evenly to provide adequate support for the decking boards. The spacing typically ranges from 300 to 400mm apart, but check the guidelines specific to your decking material and design.

Ensuring the joists are level and sturdy is crucial. Use a spirit level to confirm they are even with the frame. Secure the joists to the frame by nailing or screwing them in place, making sure each connection is firm.

Be sure to treat the wood with a sealant to help prevent moisture and rot. A correctly installed joist system offers a secure structure for the decking boards.

If you're considering the correct way to lay deck boards, the ridged side of the decking must face down. This design provides better grip and drainage, reducing the risk of mould and rot. A robust joist network is fundamental for laying decking boards correctly. The proper alignment and attachment of every joist ensures that the deck can endure both weight and weather. Start by measuring and cutting your joists to fit within the frame. Mark the locations on the frame where each joist will sit, ensuring they are evenly spaced.

Then, place the joists on the marks and double-check that everything is level. Once the joists are perfectly level and straight, begin securing them. Use galvanised screws or nails to fix the joists firmly to the frame. As you work, continuously check that everything remains level. This may seem tedious, but it’s important for the integrity and appearance of your decking. Double-check every connection to ensure that no joist is loose. Loose joists can cause the boards to be uneven and unsafe. 

 Start To Lay The Decking Planks At Each Joist

When you have secured the joists, you can begin laying the decking boards. Start at one end of the deck and work your way across, ensuring each board is correctly positioned on the joists. Lay the boards with the ridge side facing down. This helps with water drainage and keeps the surface dry. When laying the decking, leave a small gap between each board to allow the wood to expand for drainage.

A gap of approximately 5mm is usually enough for the wood to expand. This spacing prevents water from building up and reduces the risk of rot. Use spacers to create a consistent gap between each board. This step requires patience and precision. Begin by laying the boards at the first joist, ensuring each board is level and securely fastened.

Then, use screws or nails to fix each board to the joist - this provides a sturdy and long-lasting deck. Make sure to place the screws or nails at each joist to ensure the decking boards are firmly anchored. Once all the boards are in place, inspect the deck to ensure they are correctly spaced, level, and secure. Correct any misaligned or loose boards immediately to avoid future problems. By following these steps, you will create a durable and attractive decking area. 

 Fix The Decking To The Front, Back & Sides Of The Frame

To complete the installation of your decking, it's crucial to secure the boards to the frame at the side, front, and back. This step is crucial to make the deck stable and sturdy. Start from one corner of the deck to the other, fixing each board to its corresponding section.

It's important to pay attention to the ends of the boards, ensuring they are perfectly aligned with the edges of the frame. This step contributes to the deck’s stability and enhances its overall appearance.

As you work your way around, continuously check each section to ensure that all boards are secure and level. Fastening each board correctly minimises the risk of movement in the future.

Securely fastening the boards to the frame at the front, back, and sides ensures that your decking remains stable over time. Taking the time to get this step right will pay off in the long run and ensure your deck stands strong over the years.

 Mitre & Lay the Decking Planks & Fix Them in Place at Every Joist

When aiming for a professional finish for your decking, mitring the ends of the boards is essential. Mitring involves cutting the ends of the boards at a 45-degree angle. This ensures that corners, or where the boards meet at an angle, have neat and tight joints. Begin by carefully measuring where each board needs to be cut. Use a pencil or chalk to mark the cut lines clearly. Accuracy at this stage is crucial for ensuring a snug fit later on. Use a mitre saw for making the cuts. A mitre saw provides clean and precise 45-degree cuts, which are essential for achieving tight joints.

Ensure the saw blade is sharp to avoid any rough edges or splinters. Lay each mitred board against the frame, checking that they fit snugly against one another. A tight fit will not only look better but will also contribute to the structural integrity of the deck. Fix the boards in place by securing them at every joist, just as you would with the straight boards. Ensure all the mitre joints are tight and secure. Gaps or loose joints can detract from the appearance and reduce the durability of your deck.

As you continue, ensure that each section of the deck is consistently spaced and aligned. This attention to detail will result in a uniform and professional appearance. Take your time to get the cuts and placement right. Avoiding gaps and misalignments is key, as they can affect the deck's longevity. Even small misalignments can expand over time due to weather and potentially cause structural issues.

Take the time to regularly step back and review your progress. Check that all the angles and spacing look consistent and make any adjustments as you go along. By following these steps, you can create a beautiful and durable deck. Knowing the correct way to lay decking involves careful planning and secure fixing.


Are you looking for garden decking installation near you? If you require garden decking in Milton Keynes, Buckinghamshire, contact us today. Our garden design experts can supply and install beautiful garden decking for you and your family to enjoy for years to come.