How to Keep Plywood Doors From Warping

Like most people, you probably use plywood doors in your home. While these doors are sturdy and durable, they can warp over time if not properly maintained.

You may not think it, but the door to your home is one of its most important features. It provides security and privacy, and a good door also helps keep your home comfortable and energy efficient. If you’re having trouble with your door warping, don’t worry – there are a few tricks you can use to help keep your plywood doors from warping.

In this blog post, we’ll show you how to keep plywood doors from warping using simple methods. We’ll also give you tips on how to prevent your doors from warping in the first place.

How to Keep Plywood Doors From Warping

What Are the Benefits of Keeping Plywood Doors From Warping?

Having a warped plywood door not only ruins the appearance of your home but can also affect its functionality. A warped door may stick or be difficult to open and close, making it harder to use. 

Warping can also affect the insulation of the door, causing air leaks and leading to higher energy bills. Keeping your plywood doors from warping will save you both time and money in the long run. Moreover, it will ensure that your door looks and functions properly for years to come.

Necessary Tools and Materials

  1. Plywood door
  2. Sandpaper
  3. Weather stripping
  4. Sealant or waterproofing compound 
  5. Paint or stain (optional)

With these materials on hand, you’re ready to start tackling the warping of your plywood door.

10 Easy Steps on How to Keep Plywood Doors From Warping

Step 1: Sand and Seal Your Door

The first step to keeping your plywood door from warping is giving it good sanding. Use sandpaper to smooth out any rough or uneven surfaces on the door. This will also help create a better feeling for sealing.

Once the door is sanded, apply a sealant or waterproofing compound to protect it from moisture and weathering. Make sure to cover all sides of the door, including any edges or trim.

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Use Sandpaper To Smooth Out

Step 2: Install Weather Stripping

Weather stripping helps prevent air leaks by providing an extra layer of insulation for your door. It also helps keep out moisture, which can contribute to warping. Make sure to choose a weather stripping that is the correct size and shape for your door.

Step 3: Apply Paint or Stain (optional)

Adding paint or stain to your plywood door not only enhances its appearance but can also act as an extra layer of protection against warping. Choose a high-quality paint or stain and follow the instructions for application.

Step 4: Keep Your Door Clean

Part of preventing warping is keeping your door clean and free from debris. Make sure to regularly clean the surface of your door, removing any dirt or buildup that may contribute to warping over time.

Step 5: Keep Your Door Dry

Moisture is one of the biggest factors in causing plywood doors to warp. To prevent this, try to keep your door as dry as possible. This includes repairing any leaks or moisture problems in your home and avoiding exposing the door to excessive moisture, such as leaving it open during rainstorms.

Step 6: Avoid Direct Sunlight

Prolonged exposure to direct sunlight can also contribute to warping in plywood doors. Try to limit the direct sunlight your door is exposed to, such as by using blinds or shades on windows near the door. Make sure to regularly check for and repair any cracks or damage that may allow sunlight to seep through.

Step 7: Maintain Proper Temperature and Humidity Levels

Keeping your home at a consistent temperature and maintaining proper humidity levels can also help prevent warping in plywood doors. Make sure to use a dehumidifier in areas with high humidity, and avoid drastic changes in temperature.

Step 8: Use Support When Needed

If your door is already starting to warp, you can try using support such as braces or shims to help prevent further warping. Make sure the support does not put excessive pressure on the door, which could also cause damage.

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Try Using Support Such as Braces

Step 9: Store Properly

If you need to temporarily store your plywood door, make sure to do so in a dry, protected area. Avoid storing the door on the ground or in areas where it may be exposed to moisture.

Step 10: Replace When Necessary

Unfortunately, warping can sometimes be unavoidable and may require replacing the plywood door altogether. Inspect your door regularly for signs of warping and replace it when necessary to ensure it functions properly and looks good.

Following these steps can significantly reduce the chance of warping in your plywood door and keep it looking and functioning well for years to come.

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5 Additional Tips and Tricks

  1. Use marine grade plywood for exterior doors or use exterior grade plywood and seal all edges with a waterproof sealant.
  2. Make sure the door is properly hung so that it doesn’t rub against the frame or jam when opening and closing.
  3. Ensure proper ventilation in the area where the door is located to prevent excessive moisture build-up.
  4. Use a dehumidifier in areas with high humidity to prevent warping.
  5. Use weather stripping on the edge of the door to further prevent moisture infiltration.

I hope these tips and tricks help keep your plywood doors from warping! Good luck.

5 Precautions You Can Take While Keeping Plywood Doors From Warping

  1. Store your plywood doors flat or upright, rather than on their edges, before installing them.
  2. Seal all edges of the door with paint or sealant to protect against moisture.
  3. Install the plywood door in a protected area, such as indoors or on a covered porch, rather than outside, where it may be exposed to constant changes in temperature and moisture.
  4. If the door does warp, sand down any raised areas and re-seal to prevent further warping.
  5. Regularly check and maintain the door, especially in areas with high humidity or frequent storms.

Following these precautions can greatly reduce the likelihood of your plywood door warping.

Check and Maintain The Door

What Should You Do if You Live in a Humid or Storm-prone Area?

In humid or storm-prone areas, it is especially important to seal the edges of the plywood door and regularly maintain and inspect it for any warping.

Additionally, installing the door in a protected area, such as indoors or on a covered porch, can also help reduce the chance of warping due to moisture and harsh weather. 

Using a dehumidifier in the area can also help prevent warping caused by high humidity levels. If the door warp, sand down any raised areas and reseal to protect it against further damage.

Overall, taking extra precautions and being diligent with maintenance can go a long way in preventing warping in plywood doors in humid or storm-prone areas.

What Can Cause a Plywood to Wrap?

1. Moisture and Humidity

Plywood is made up of layers of wood that are glued together, making it susceptible to changes in moisture and humidity levels.

2. Poor quality of Materials

Lower grade plywood or not sealing the edges can also contribute to warping.

3. Improper Installation

Failing to properly support the weight of the door or not allowing for expansion can also lead to warping.

4. Direct Sunlight

Constant exposure to direct sunlight can cause the plywood to expand and warp over time.

5. Age

As the door ages, it may also become more prone to warping.

It is essential to seal and finish the plywood before installation properly. This can help protect against moisture and humidity damage. Additionally, installing the door with proper support and allowing for expansion can also help prevent warping.

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What Kind of Plywood is Best for Doors?

It depends on the specific application and location of the door. Generally, marine grade plywood is recommended for exterior doors due to its higher moisture resistance. Exterior grade plywood can also be used for exterior doors, but it should be sealed with a waterproof sealant to protect against moisture damage.

In interior applications, using high quality plywood with fewer imperfections can help prevent warping. It is also important to seal and finish the door properly before installation to protect against moisture damage.

Ultimately, using durable plywood that is suitable for the specific application and properly sealed and finished can help prevent warping indoors.

It is Also Important To Seal and Finish


Plywood doors are a great way to add an extra layer of security to your home or office. However, if they’re not correctly cared for, they can warp and become unusable. 

Over time, even the best plywood doors can warp. Warping doors are a common issue, but there are ways to prevent them. Following the tips in this blog post, you can keep your plywood doors from warping and ensure they last for years.

Now you know how to keep plywood doors from warping. Hopefully, these tips will help you keep your plywood doors in top shape and functioning properly.

So what are you waiting for? Get out there and start building! Happy door maintenance!

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Adrian Green

Adrian has been interested in woodworking since he was a child. His father had a woodworking shop, and Adrian would help him out and learn from him. He gained basic carpentry knowledge as well as an understanding of how to work hard and take care of business. He enjoys woodworking as a hobby. He loves the feeling of creating something with his own hands, and the satisfaction that comes from seeing his finished products used by others. So he started this blog to spread his passion and knowledge to those interested in DIY wood-working projects. He knows that with a little guidance and practice, anyone can create beautiful pieces of furniture or décor from scratch.

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