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The Ultimate Guide to Using Decking Boards For Raised Beds

Woman planting vegetables in a raised bed made from decking boards

Composite decking boards for raised beds have grown increasingly popular in recent years. Many homeowners now choose them as a stylish option for their gardens. Making raised beds with decking boards is an innovative approach to creating a garden that will add both functionality and beauty to your outdoor space.

When it comes to this latest garden trend, there are many benefits, such as the durability and aesthetic appeal of the boards. However, it’s important to note that there are also potential drawbacks to using this material. Weighing the pros and cons. will help you make an informed decision about using decking boards for your raised beds.

In this article, we’ll explore everything you need to know about making raised beds with decking boards.

Understanding Decking Boards

Composite decking boards are made up of multiple materials, but mainly plastic and wood. The wood can be anything from sawdust and woodchips and the plastic can either be recycled materials or virgin plastics. At Assured Composite®, we use high-quality wood fibres and recycled plastics to ensure durability and eco-friendliness. 

Decking boards are designed to look and feel like real wood. They come in a variety of colours and textures, giving homeowners plenty of options to choose from to create their desired look. Using decking boards for raised beds is a great way to add a touch of style and durability to your garden. 

Top tip! 

You need to line your raised beds with a plastic liner to provide a barrier between the decking boards and the soil

The Benefits of Using Composite Decking Boards for Raised Beds

There’s been a huge increase in this trend recently, and it’s easy to understand why when you look at the many benefits of recycling decking boards in your garden!

Longevity & Durability

Decking boards for raised beds are great because they are made of strong composite material. This means they can withstand tough weather and resist rotting and decay, which means your raised beds will last for a long time without needing to be replaced often.

Also, the boards don’t split or warp easily, so your raised beds will remain stable and strong.

Low Maintenance

Unlike traditional wood, composite decking boards for raised beds require minimal maintenance. They do not need to be stained, sealed or painted, saving you time and effort in the long run. 

With a range of colours available, you can still personalise your raised beds to your garden styling without needing to pick up a paintbrush!

Moisture Resistance

A young plant in the ground getting watered

Raised beds are exposed to constant moisture from watering plants. Composite decking boards are designed to withstand moisture without warping, splintering, or cracking. They provide excellent resistance to water absorption, ensuring the longevity of raised beds.

The Drawbacks of Using Decking Boards for Raised Beds

Of course, not all elements are rosey. There are a few drawbacks that are worth considering before you start your garden build.


Composite decking boards are generally more expensive than traditional wood materials like lumber. If you’re on a tight budget or plan to make large raised beds requiring lots of boards, the cost of composite decking boards can be prohibitive.

However, if you’re recycling old boards or have some left after a flooring project, the cost isn’t a factor you need to worry about.

Heat Retention

Composite materials, especially darker-coloured ones, tend to absorb and retain more heat than wood. In a raised bed, this can lead to increased soil temperatures, potentially affecting plant growth and requiring more frequent watering to mitigate heat stress.

Are You Ready to Make Raised Beds From Decking Boards?

All in all, composite decking for raised beds is a great option for anyone looking for a long-lasting, low-maintenance solution. Not only does it resist, rot, mould and insects, but it also looks great and comes in a variety of colours. Plus it’s eco-friendly and made from recycled materials, so you can feel good about your latest garden addition.

If you’re looking to transform your garden space with composite decking, look no further than Assured Composite. Located in Melton Mowbray and supplying the whole of the UK with fully certified wood polymer composite (WPC), we’re here to support your home renovation projects.

Don’t hesitate to contact our expert team so we can provide you with comprehensive solutions and help you choose the right composite decking for your home.