phone icon 01925 943011



What Lengths Do Decking Boards Come In?

Building a deck in your home can be a great addition to your outdoor space. You will be able to relax, entertain and enjoy different activities on it. However, knowing the right deck dimensions can be very tough for you, especially if you are new to deck building. There are different kinds of decking boards with varying lengths available in the market today.

Length of Decking Boards

The length of the decking board varies from 2.4m to 4.8m. Many timber suppliers can offer wood decking boards in lengths to suit your project and budget. Composite and PVC do come in longer length but aren’t as ready available as wood decking, this enables a smaller selection of length starting from 2.4m and ending at 4m, unless you wish to pay high costs for 4.8m or 5.2m length. For more information on longer length don’t hesitate to get in touch for any additional support and help.

Types of Decking Boards

Decking Length Example Photo

Composite Decking

Composite decking boards are durable decking materials. They contain wood fibres and recycled plastic. They are resistant to moisture and cannot rot. Apart from that, composite boards are available in different colours they retain there colour for longer, fading less than wood. They are resistant to warping, cracking and splintering. The length of the decking board varies. It varies from 2.4m to 4m. Some suppliers offer composite decking at 4.8m and 5.2m. Be mindful, that the longer the decking board, the more challenging it can be to deliver, therefore rising the cost of your project. Choose a board size that is cost effect and suitable for your deck size.

Pressure Treated Wood

These kinds of decking boards are from pressure-treated pines. The chemical in the wood prolongs the lifespan of the wood. Providing increase resistant from mould, mildew and fungus, thereby reducing the time in which the wood will rot. Pressure-treated wood decking is also resistant to insect damage. Insects like termites will not be able to penetrate the wood due to the chemicals in it. They are available for use in different lengths. The length of the decking board varies from 1.2m to 4.8m. Again check with your supplier to discover if they have longer lengths available.


Decking boards made from cedar are also resistant to rot and decay. They are naturally resistant to moisture as well as insect damage. Cedars can thrive in different climate conditions and are suitable for decks. The various lengths of the decking boards allow you to choose a length that will suit your deck size. These length consist of 1.2m to 4.8 lengths

PVC Decking

PVC decking contains 100% plastic. They are durable decking materials that can last for several decades. They are waterproof and won’t rot or decay. Additionally, PVC is also resistant to mould and does not need oiling, staining or sealing to make it last longer. The length of the decking board also varies from 2.4m to 4m. You can always buy a board size of your choice.

Aluminium Decking

Aluminium decking boards are available in powder-coated finishes, silver, and grey. The length of the decking boards are mainly only in 3.6m online. Aluminium decking requires little to no maintenance. They cannot warp, crack or splinter. Besides that, aluminium decking can not fade; no worries about oiling, staining or painting. It is also resistant to mould and the best fire rated decking on the market today.

Advantages of Long Decking Boards

Many prefer longer decking boards for several reasons. For instance, since longer boards span greater distances, there will be less exposed ends. While composite decking boards are highly resistant, these ends can be susceptible to a few issues, such as warping and moisture absorption. You will save much more from replacement costs in the long run, as long as you maintain the decking properly.

Another excellent advantage of longer decking boards is their aesthetics. With fewer cuts and ends, you will have a smoother and cleaner-looking decking. If you are going for a straightforward decking layout, longer boards are better suited for the job. With fewer cuts and exposed ends, it also lessens the likelihood of the boards popping out. Besides using them as usual, long decking boards are also handy for other uses. For instance, you can use them to picture frame your decking.

Disadvantages of Long Composite Decking Boards

While there are several disadvantages of long composite decking boards, there are a few drawbacks as well. One of the many concerns in using long decking boards is stability. The longer the decking boards, the bendier it gets. If you plan to use long decking boards, you will have to follow the correct joist spacing to ensure a sturdy decking.

Long length boards are more prone to warping too, to make longer boards less flexible and more sturdier, many manufacturers make them thicker than shorter boards. For this reason, they may be more expensive when it comes to initial cost. Besides the thickness, the limited stock of longer decking boards for example in 24″ foot decking boards, can make it more expensive. Ordering from a custom-length board supplier can often be cheaper.

Another disadvantage of longer decking boards is the cost of delivery especially online. Longer length boards more so over 4m is classed as ugly freight in the sector and almost always come with a higher delivery price.


The lengths of the different types of decking materials vary from supplier to supplier. Consult your supplier to discover what lengths are widths of the material required they can supply.

Previous ArticlePrevious Article

How to Clean Your Decking Boards

Next ArticleNext Article

Can I Build a Shade Over My Composite Decking?

Request a sample