The best timber to use for decking joists should be good. It should be a kind of timber that can resist rot and termites. If you use good wood to build your decking joist, the deck will not collapse over time. So, what is the best timber for decking joists?

What is a Decking Joist?

What is the Best Timber for Decking Joists?

Decking joists are structures on which the wood or composite decking is laid. Using the best timber for decking joist is important. This will ensure that the decking lasts for a very long time. The deck will not bend, rot or sag over time if you use the best lumber for the decking joist.

Factors to Consider When Choosing Timber for Decking Joist


When choosing the best timber for decking joist, choose a wood that can thrive in different areas. Some kinds of wood absorb water and rot. This kind of lumber will not be suitable for decking joists in a damp environment. Ensure you choose a type of wood that will withstand favourable and unfavourable weather conditions.


Apart from the location, you also need to consider your budget. The amount you want to spend on timber for decking joists should meet your budget. There are decking joist timbers that are expensive, and there are some that are less expensive. Considering your budget will help you to choose a timber type that will fit your budget.


How available is the timber you intend to use? Is it readily available in your locality? When considering the best timber for a decking joist, ensure you choose a kind that’s not scarce. It would be best if you chose a type that is readily available in your area.  


When choosing the best timber for the decking joist, keep in mind that it will still need some form of maintenance. Some kinds of timbers require less cost of maintenance, while others might be expensive to maintain. 

The Best Timber to Use For Decking Joist


Ironbark is hardwood. It is very durable, making it the best timber for decking joists. Apart from its durability, Ironbark has some other properties. It is resistant to fire. If there is a fire incident, an ironbark decking joist will not get burnt. In addition to that, it is also resistant to termites. This means that termites cannot eat your decking joist if you use ironbark wood. These attributes of Ironbark make it the best wood for decking joists.

  Spotted Gum

 Another kind of timber that is best for decking joists is Spotted gum. Spotted gum is a very strong and durable timber. It is suitable for decking joists because of its strength and durability. Like the Ironbark wood, Spotted gum is also resistant to fire. 


Cedar is also the best lumber you can use in making a decking joist. There are red cedar and white cedar types. Cedarwood can thrive in various climate conditions. You can use cedar for decking joists in any region, no matter the climate. Cedar is also resistant to damage caused by termites. If you use cedar for your decking joist, termites will not be able to eat it. It makes Cedarwood the best choice for decking joists.

Pressure-Treated Pine

Pressure-treated wood is also good for decking joists. It is a kind of timber that is versatile and easy to work with. However, it does not have a beautiful appearance like other timbers. It is less expensive and favourable for those with a small budget. Apart from that, pressure-treated pine is resistant to termites. The chemicals infused into the wood make it impossible for termites to eat it. While it is not aesthetically pleasing like hardwood, it is affordable timber to use for decking joists.


The best timber for decking joists should be a kind that is resistant to termites, decay, or rot. Timbers like Cedar, Ironbark, Spotted Gum, and pressure-treated pines are good for making decking joists.