What Base Do You Need for Composite Decking?

Henry A
plastic wood decking base

When building a composite decking, the first thing you need to do is create a base for the decking. Without the proper foundation, your composite decking won’t last as long as it should. So, what base do you need for composite decking? You will need a solid base so that your decking will stay strong on the ground. How do you create a frame for composite decking?

What Base Do You Need?

When building composite decking, you’ll want solid and level ground, especially for ground-level and floating decking. One of the few ways to achieve this is by pouring concrete over the area where you’ll install the decking. However, you’ll need to create drainage to avoid water pooling, which can potentially damage the frame of your decking.

Another easier way to create a base for floating decking without needing to pour concrete into your garden is by using concrete slabs. You can even use it on dirt. However, if you do so, you’ll want to kill the weeds and grass within the area of installation. It’s also best to cover the ground with landscaping fabric. The fabric will help prevent the growth of weeds and grass, which can be damaging to the frame of your decking.

As for uneven land, aside from slabs, one of the things you can do is to install adjustable pedestals. You can also use it to raise the decking level without needing to make major changes to your garden. You can purchase adjustable pedestals from your composite decking supplier.

After ensuring an appropriate base for your composite decking, the next thing you’ll have to do is to create a frame. But what materials should you be using? How do you build it?

What Materials Should You Use?

When it comes to the frame, selecting the right materials is as important as the plastic decking itself. If you plan to use a long-lasting composite decking, you’ll want a frame that can last as long. For composite decking, at least a pressure-treated frame is necessary. However, if you want added durability, you can also find composite decking wood for framing.

Creating a Base and a Frame for a Composite Decking

Composite Decking Base

Creating a frame for composite decking depends on the type of decking you’ll be building. The first thing you’ll want to do is to create a layout. With a string, some stakes, and a can of spray paint, mark the corners and post locations of your composite decking.

Next, dig the holes for the post if you’re working with dirt. If you have concrete, you can use post anchors to set the decking posts. You can also use adjustable pedestals to raise the decking frame, especially if you think there’ll be any water pooling problems or the area is not flat.

After installing the post, you’ll need to create a frame for your decking. For fixed decking, you have to anchor it on one side of your home. Next, install the beams and the joists. For this step, there is one important thing you should remember, and that is proper joist spacing.

How much space should joists be apart? For the most part, 300mm in the centre is the most common spacing for the majority of subframes for composite decking. However, you will still want to consult your decking board for manufacturers.

Joist Spacing

If the joists are too far apart, the composite decking can be unsteady and sagging. However, installing them too close to each other will not only use more materials but can also be more difficult to install. Once the joists and the frame are installed, you can now start to add the decking boards.

Installing decking without any professional help is possible. However, you will need a good base for the composite decking. Many use concrete flooring and concrete slabs for an even and stable base. Some also use adjustable pedestals. Using pressure-treated wood or composites will make a strong and durable frame.


Leave a Reply

Your email address will not be published.