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Close-up of timber deck


If the timber in your deck is splitting, it may be time to repair it. However, there's no need to replace the whole thing! In this DIY project, we show you how to replace an old board with a few common tools and a little time, ensuring you can enjoy your deck for years to come.


1Gather your tools and materials

Below you'll find all the tools and materials you'll need to complete this project.

2Identify where your joists are

First up, we need identify where your screws are this will help you find the joist.

3Remove the old screws

Remove the old screws on the board that you are replacing, don't forget to wear your safety goggles and ear protection.

4Remove the old board

Once all the screws are removed, use a screwdriver to lever the old board up and out of the decking.

5Measure the length

It's now time to measure the gap where your new board will be going and cut it to length. Place the old board over the new one and use your pencil to mark the correct length.

6Cut to length

Once you have the markings, you can cut the new board using a circular saw or handsaw.

7Mark out your screws

Place your board into the gap and now mark out where your screws will go. They should be in line with the existing nails on the deck, and 15mm in from each edge and 10mm from the ends.

8Pre-drill your holes

With your board in place, pre-drill the holes with 2.5mm drill bit so the new nails won't split the board. Use a countersink drill bit it so that your screws sit flush with your deck.

9Drill in your screws

Place the screw into the hole and then screw into place.

10Time to make it look great

Now that your new board is in, it's time to oil or stain it to match the rest of your deck! Follow our step-by-step guide to oiling your deck for best results. 
Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.