Can You Use Treated Plywood For Subfloor

By Sophia Grace | July 5, 2024

Can You Use Treated Plywood For Subfloor?

Treated plywood is a type of plywood that has been treated with chemicals to make it resistant to rot, decay, and insects. It is often used in outdoor applications, such as decks, fences, and siding. However, can you use treated plywood for subfloor?

The answer is yes, you can use treated plywood for subfloor. However, there are a few things you need to keep in mind:

  • Treated plywood is not as strong as untreated plywood. This is because the chemicals used to treat the plywood can weaken the wood fibers. As a result, treated plywood is not recommended for use in high-traffic areas or areas where it will be subjected to heavy loads.
  • Treated plywood can be more expensive than untreated plywood. This is because the treatment process adds to the cost of the wood. However, the added cost may be worth it if you are using the plywood in an outdoor application where it will be exposed to the elements.
  • Treated plywood can be difficult to cut and work with. This is because the chemicals used to treat the wood can make it difficult to saw, drill, and nail. As a result, it is important to use sharp tools and to be careful when working with treated plywood.

If you are considering using treated plywood for subfloor, it is important to weigh the pros and cons carefully. Treated plywood is a good option for outdoor applications, but it is not as strong as untreated plywood and it can be more expensive and difficult to work with. If you are not sure whether treated plywood is the right choice for your project, it is best to consult with a professional.

Here are some additional things to keep in mind when using treated plywood for subfloor:

  • Make sure the treated plywood is rated for ground contact. This means that it has been treated with chemicals that will protect it from rot and decay.
  • Install a vapor barrier between the treated plywood and the subfloor. This will help to prevent moisture from wicking up into the plywood and causing it to rot.
  • Cover the treated plywood with a flooring material, such as carpet, tile, or hardwood. This will help to protect the plywood from wear and tear.

By following these tips, you can help to ensure that your treated plywood subfloor will last for many years to come.


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