Creating a long-lasting deck starts with choosing the right materials for the project—including the plywood and sealant. When you invest hours and funds building the outdoor surface, you want it to last for a long time. However, the weather can take a toll on its appearance. Use this beginner’s guide to implement proper waterproofing techniques to ensure your deck remains strong for years to come. 

3 Steps to Waterproof Your Plywood Deck 

1. Select Durable Plywood 

There are two types of plywood: interior and exterior. While interior types offer a more polished look, outdoor varieties often have more visible knots and blemishes that add character to the deck. Outdoor plywood is much more durable, and is layered with waterproof glue to keep it intact. Pressure-treated plywood works best for decks, as it’s a stable material. 

2. Choose a Waterproofing Sealant

When you’re building a deck, you’ll see a variety of sealants specifically made for outdoor surfaces. Since the structure will be exposed to direct sunlight, choose a sealant that is UV-resistant, so it will withstand the rays and prevent the color from fading. Most sealants are slightly tinted due to the sun shield, but it will not significantly alter the color of your deck. 

3. Apply the Sealant

Apply an even coat of the sealant to the entire surface using a pump-up garden sprayer. When painting stairs, switch to a medium-sized brush so you can effectively seal creases. Refer to the product instructions for specific dry times, and don’t use your deck until the sealant is completely dry. 

Every plywood project starts with high-quality materials. Freres Building Supply is the most experienced and dependable seller of lumber, drywall, and plywood. Located in Stayton, OR, they will answer all your questions and recommend the best material for your project. Whether you need fencing, siding, or power tools to finish the job, they will provide everything you need. View their inventory online or call (503) 769-2879.