Why Is My Composite Decking Warping?

Composite decking is a popular type of decking that is made up of different types of wood fibers and synthetic materials. It’s a great option for both residential and commercial applications, and it can last a long time if it’s treated properly.

But if your composite decking is warping, it could be due to a number of factors. In this article, we will discuss some of the most common causes of warped composite decks and how to fix them.

What Is Composite Decking?

Composite decking is a type of decking material that is made from a mixture of wood fibers and plastic. This type of decking is becoming increasingly popular because it is durable, easy to maintain, and does not require as much upkeep as traditional wooden decks.

One of the main benefits of composite decking is that it is very low maintenance. Unlike traditional wooden decks, composite decks do not require annual sealing or staining. You will also not have to worry about splinters with composite decking.

Another benefit of composite decking is that it is very environmentally friendly. The materials used to make composite decking are recycled, so you can feel good about using this type of decking in your home.

If you are considering adding a new deck to your home, you should definitely consider composite decking. This type of decking offers many benefits over traditional wooden decks, and it is sure to give you years of enjoyment.

Why Might Composite Decking Warp?

There are a few reasons that composite decking may warp.

  • First, if the boards are not installed properly, they can warp.
  • Secondly, if the ground underneath the deck is not level, it can cause the decking to warp.
  • Finally, if the composite decking is not made of high-quality materials, it is more likely to warp.

If your composite decking is warping, it is important to figure out why. If the boards were not installed properly, you may be able to fix the issue yourself.

However, if the ground underneath the deck is not level or the composite decking is not made of high-quality materials, you will likely need to replace the entire deck.

Composite decking can be a great option for your home. However, it is important to make sure that it is installed correctly and made of high-quality materials in order to avoid any issues.

How Can You Fix A Warped Composite Deck?

If your composite decking is warping, it could be due to a number of factors. Learn about what could be causing the issue and how to fix it.

One of the most common reasons for composite decking to warp is because it hasn’t been properly installed. If the boards aren’t properly spaced or supported, they can start to warp over time.

Another reason for warping might be because the boards were exposed to excessive moisture during installation or afterwards. If you think this might be the case, check to see if there’s any water pooling on your deck or if any of the boards are discolored or swollen.

If your composite decking is warped, you’ll need to take action to fix it. The first step is to figure out what’s causing the problem.

Once you know that, you can take steps to prevent it from happening again in the future. For example, if improper installation is to blame, make sure that the boards are properly spaced and supported before you install them.

If moisture is the issue, make sure that your deck is well-ventilated and that you’re using a moisture barrier between the decking and the ground.

What Should You Do To Prevent Your Composite Deck From Warping?

It’s important to take care of your composite deck so that it doesn’t warp. There are a few things you can do to prevent this from happening:

  1. Make sure the surface is level when you install the deck. If there are any high or low spots, it could cause the decking to warp over time.
  2. Avoid putting anything hot on the surface of the deck. This includes grills, smokers, and even direct sunlight. The heat can cause the material to expand and warp.
  3. Don’t let water pool on the surface of the deck for extended periods of time. This can lead to mold and mildew growth, which can also cause warping.
  4. Inspect the deck regularly for signs of warping and take action to fix any problems as soon as possible.
  5. By following these simple tips, you can help keep your composite deck looking its best for years to come.

Is It Worth Fixing A Warped Composite Deck?

Warping is one of the most common problems with composite decking. While it is not usually a structural issue, it can be unsightly and cause your deck to feel uneven. There are a few different things that can cause your deck to warp, and understanding the cause can help you decide if it is worth fixing.

One of the most common causes of warping is improper installation. If your deck was not installed correctly, it is more likely to warp over time. This is because the boards are not evenly supported, which puts stress on them and causes them to warp.

Improper installation is often the result of inexperience or using the wrong type of fasteners. If your deck was installed by a professional and you are still having problems with warping, it is likely due to one of the other causes.

Another common cause of warping is excessive moisture. If your deck is constantly exposed to moisture, whether from rain, snow, or humidity, it can cause the boards to swell and warp. This is especially true if your deck does not have proper drainage. Too much moisture can also lead to mold and mildew growth, which can further damage your deck.

If your composite deck is warped, there are a few different ways you can try to fix it. You can start by tightening or replacing any loose fasteners.

You may also need to add additional support beams or joists to help keep the deck level. In some cases, you may be able to sand down the warped areas to make them less noticeable. However, if the problem is severe, you may need to replace some or all of the boards.

Deciding whether or not to fix a warped composite deck depends on several factors. The severity of the warp, the cause of the warp, and the cost of repairs are all important considerations. In most cases, it is worth trying to fix a warped composite deck rather than replace it entirely.


While warped composite decking can be annoying, it is usually not a structural issue. In most cases, you can fix a warped composite deck by cleaning and drying it, then stacking the boards on top of each other to let them adjust back to their original shape.

If your composite deck is warped due to heat, you can try cooling it down with a hose or fan. In some cases, it may be necessary to replace individual boards or the entire deck. Use our tips to prevent your composite deck from warping in the future.