Plywood for Exterior Projects: A Guide to Choose the Right plywood

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Plywood is a versatile and popular type of engineered wood that is made by gluing together several thin layers of wood veneers in alternating grain directions. The result is a strong and durable board that is resistant to warping and splitting. Plywood is commonly used in construction, furniture making, and other applications where a stable and reliable material is needed. The thickness of plywood can vary, ranging from a few millimeters to several centimeters, depending on the intended use. 

Plywood can be made from a variety of wood species, including hardwoods such as oak, maple, and birch, as well as softwoods such as pine and spruce. It can also be produced with various grades and finishes, depending on the quality and appearance desired.

Plywood sheets are flat panels made from plywood that can vary in thickness, size, and number of layers. They are available in a wide range of grades and qualities to suit different applications and budgets. Plywood sheets can be cut, drilled, sanded, and finished just like solid wood, making them a popular choice for DIY projects and professional construction.

They are used for a variety of purposes, including cabinetry, furniture making, and kitchen countertops. They are also a popular material for exterior and interior doors and windows because of their strength, stability, and resistance to moisture and decay.

Here’s a guide to help you choose the right plywood for your exterior project:

Choosing the right plywood involves careful consideration of several factors to ensure that the final product meets your specific needs and requirements. By taking the time to research and select the right plywood, you can ensure that your project is successful and long-lasting.

  1. Look for Exterior Grade Plywood: Exterior grade plywood is specifically designed to withstand the elements and moisture, making it the ideal choice for exterior projects. It is made with waterproof glue and is treated to resist rot, fungi, and insects. This type of plywood is often marked with an “X” or “Exterior” stamp.
  1. Check the Plywood’s Exposure Rating: Plywood’s exposure rating refers to how well it can withstand prolonged exposure to the elements. The rating is usually listed on the panel and is identified by a letter: A, B, C, or D. The higher the letter, the better the plywood’s ability to withstand weather exposure. For exterior projects, choose a plywood panel with an exposure rating of A or B.
  1. Consider the Plywood’s Core: Plywood can have different types of cores, such as veneer core, particleboard core, or MDF (medium-density fiberboard) core. Veneer core plywood is the most commonly used type for exterior projects as it is strong, durable, and water-resistant. Particleboard core and MDF core plywood are less expensive but are not as durable and may not hold up as well in outdoor conditions.
  1. Look for the Right Species: Plywood can be made from various wood species, each with its unique properties. For exterior projects, choose plywood made from durable, moisture-resistant wood species such as Douglas fir, Western red cedar, or redwood.
  1. Choose the Right Thickness: The thickness of the plywood you choose will depend on the type of project you are working on. Thicker plywood is generally stronger and more durable, but also heavier and more expensive. For exterior projects such as roofing, siding, or decking, consider using plywood that is at least 5/8″ thick.
  1. Check for Imperfections: Finally, before purchasing any plywood, carefully inspect each panel for any imperfections such as warping, cracks, or splits. These imperfections can weaken the plywood and compromise its effectiveness in your exterior project.


Choosing the right plywood for your project is a crucial step in ensuring its success and longevity. When it comes to choosing plywood, there are several factors to consider such as the grade, thickness, type of wood, and the intended use of the plywood.  Whether you’re looking for commercial, marine, or decorative plywood, CenturyPy has got you covered. 

Their products are suitable for use in a variety of applications, including furniture making, construction, and interior design. CenturyPly is a reputable brand that offers a wide range of plywood options suitable for various applications. Their products are known for their durability, strength, and quality. However, it is important to ensure that you select the right CenturyPly plywood based on your specific project needs and requirements.

Also check – Is All Plywood Fire-Retardant? What’s the Difference?

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