Knowing how to lay composite decking may seem like a simple concept at the beginning, but there are a few common pitfalls that people often trip up on, particularly based on the materials they use and the location of where they’re building.
We’ll cover each type of decking installation consideration, as well as the best practices when installing on specific ground types.
- how to install composite decking with screws
- how to install composite decking without screws
- how to install composite decking with hidden fasteners
- how to lay composite decking on concrete
- how to lay composite decking on gravel
- how to lay composite decking tiles on soil
- how far apart should joists be for composite decking?
Composite decking installation considerations
When it comes to installing composite decking, you have a few key considerations to keep in mind.
You can choose between using hidden fasteners, screws or even opting for a screw-free installation method.
Each option has its own set of benefits and challenges, so it's important to weigh them carefully before starting your project.
How to Install Composite Decking with Screws
Screws are a reliable method of securing the boards to the joists. To do this, you start by drilling pilot holes before screwing the boards down to prevent cracking.
When you lay your boards/tiles, ensure they are perpendicular to the joists to distribute the load more evenly. Also, be sure to use corrosion-resistant screws that can withstand exposure to moisture and other elements.
How to Install Composite Decking without Screws
To install composite decking without screws, you’ll need to either use hidden fasteners or clips that fit over the edges of the boards. These clips are often made of stainless steel and come with your composite decking but are also available separately.
How to Install Composite Decking with Hidden Fasteners
For those going for a clean look, hidden fasteners are by far the sleekest way to install composite decking. Hidden fasteners get rid of the need for visible screws on the surface of the deck boards.
The installation is easy and typically starts by getting the joists spaced appropriately. Then, the grooved edge of one board is slid into the groove of another board, and the hidden fastener underneath secures them.
This method also helps prevent moisture from seeping into the deck boards, helping with a long-lasting deck.
Installing composite decking on specific surfaces
When laying composite decking on specific surfaces, you must consider each type of foundation.
Whether it's concrete, gravel, or soil, each surface presents its own challenges and installation methods that you need to be aware of.
Understanding the steps when laying composite decking will ultimately determine how well your decking lasts over time.
How to Lay Composite Decking on Concrete
The key thing to look out for when installing decking on concrete is making sure that it is clean and level (mostly in terms of cracks and bumps). You can sweep away any debris and repair/fill any cracks.
You can use a moisture barrier on the concrete to help prevent water damage and prolong the deck's life over time.
Then, continue with the typical composite decking installation and consider any tips provided in our other guides on how to lay decking.
How to Lay Composite Decking on Gravel
For gravel surfaces, you can use a rake to level out the gravel, as it is likely uneven from day-to-day walking. You’ll need to put a weed barrier fabric over the gravel to prevent unwanted growth underneath.
Due to gravel's unsteady nature, you should always make sure to install a sturdy frame around the deck's perimeter for additional support.
Gravel isn’t as firm as dirt or concrete, so you will also need to install a sturdy frame around the deck's perimeter for additional support. Use adjustable deck supports to elevate the decking boards for better airflow and drainage.
How to Lay Composite Decking Tiles on Soil
Soil is the most typical ground for installation in the UK. So, to install composite decking tiles on soil, you will first, like all others, need to clear the area of debris, rocks, and roots and compact the ground to provide a solid base.
Laying down a geotextile membrane will help prevent weed growth and boost drainage. When using tiles, which is a common composite decking option, place the tiles from one corner to another, keeping them snug as you go. Check for gaps and adjust as needed.
How Far Apart Should Joists Be for Composite Decking?
Joist spacing is the distance between joists and is measured from centre to centre of joists. In the UK, they are typically spaced no more than 400mm apart for proper support.
Good joist spacing prevents sagging and warping, creating a better-looking deck all around.
Sourcing the materials for your composite decking at MGM Timber
Now that you know how to lay composite decking, you need to invest in quality materials. That means finding a local timber merchant like MGM Timber, which has all the supplies you need to complete your decking project. Get in touch with our timber experts today.