If you have installed your composite decking for a long time, you will discover that your decking needs replacement. It doesn’t imply that composite decking is not good or that it is not durable. As a result of things beyond your control, your decking or part of it might need replacement. Lack of maintenance might let mould destroy some of your composite boards. Or, scratches that result from dragging heavy objects on top of your decking can distort the appearance of some of your decking boards. When this happens, you might want to replace the old composite decking.

When Composite Decking Boards Might Need Replacement

Composite decking is a durable flooring material that will last longer than other decking types. Makers of composite decking usually give a warranty for their decking. If you install your wood-plastic composite carefully, it can last for up to 25 years, depending on the grade. But, your composite decking might not last that long. 

This is because some homeowners refuse to maintain their decking after installing it. If leaves, pollen and other organic matters should decay on your composite wood, it will create the right breeding environment for mould and mildew. Mould will eat into the core of your decking if you don’t remove them on time. When they do, they will multiply and form black spots on the surface of your plastic wood decking. 

This will distort the appearance of your wood-plastic composite. Another reason homeowners might have to change their decking is if the boards are scratched. Scratches can occur if you drag weighty objects on the surface of your decking. When this happens, the surface or top of your decking won’t be good to look at. A stain like a grease or oil can spill on your decking and destroy the appearance. 

If your wood plastic composite is badly stained, you might have to change the boards. Aside from stain, if you install the old first-generation uncapped composite decking and water to the surface, the boards can swell and warp. This is another reason to change your composite boards. 

How to Replace Your Old Composite Decking Boards

If one of those things we described above happen to your composite decking, then you must change the affected composite boards. Changing the boards requires skill, and you should be able to use carpentry tools. You will need screws for the task. Also, you will need a crowbar, drilling machine, and clips that you will use to hold your composite boards. 

Identify the Boards You Want to Replace

If you wish to replace your decking, you should identify the boards you want to replace and know why you are replacing them. If mould has destroyed your decking, you have to check the joists to see if they are intact. Or, if water has destroyed the boards, you must check the joists too. 

Remove the Boards

Replace your old wood decking

After identifying the boards you want to replace, you should remove them with a crowbar or loosen the screws. You should use a crowbar only if you install your composite boards with nails. Since crowbars are used to remove nails, unplugging your decking nails with them will help you remove the boards. 

Most composite boards are installed using screws. To remove composite boards installed with screws, you can unscrew the boards. If your decking is installed with clips and fasteners, You should remove the clips that hold your decking boards together. 

Check the Composite Decking Joists

The next thing is when you want to replace old composite decking is to check the joists. Your decking joists is the frame or structure that you install your decking boards on. Joists are made with wooden planks. Since wood can absorb water and swell, the joists that support your decking can become weakened. If that happens to your decking joists, then you must change the joists before you put new composite boards on them. 

Replace the Composite Decking Boards

After you have checked the joists and ensure that they are good, you should replace the boards with new ones. If you use grooved decking, ensure that you use it all through. You should do the same for ungrooved decking. Ensure that you fix your composite boards properly and you leave a 5 mm space between them.


The best way to replace old composite decking is to remove the old boards, check the joists for wears before you replace the boards with new ones. 

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