Marine plywood is constructed in the same manner as any other type of plywood you find on the market. All plywood is formed out of thin pieces of wood and then sealed with a binder. There is not much difference between exterior plywood and marine plywood other then the binder used in marine plywood is formulated for water submersion. Exterior plywood can be used for the same things as marine plywood if it is properly sealed and treated. Interior plywood is made out of three to five layers of wood, while marine plywood and exterior plywood have twice as many layers. These extra layers do away with the voids found in interior plywood. The information below will share with you the best uses for marine plywood.
If you love sailing or fishing, then you most likely own a boat. Buying a boat is not an inexpensive purchase by any stretch of the imagination. You can, however, find less expensive older boats that are not made out of fiberglass but marine plywood instead. This type of plywood is pliable and can be formed into the structure of a boat. With proper sealing on the inside and out, the marine plywood will be completely waterproof.
2. Lake Platform
A lake is a wonderful place to spend time with family, having fun and relaxing. Putting a lake platform in the center of the lake will give your family and guests a place to suntan and hangout. If there are fish, then you can also use it as a fishing platform. Marine plywood is the only reasonable choice for something like this because it will not rot and fall apart on you. Simply nail and glue several sheets of marine plywood together and seal them with waterproof sealer. Bolt a weight to the bottom attached to a rope to act as an anchor and lash floatation buoys to the bottom at each corner.
3. Boat Dock
You will see that older docks are made from planks of wood such as 2x4s that are treated to be weatherproof. Though this is common, the lumber has to be sanded and treated each year, whereas marine plywood can go several seasons without having to have another treatment of weatherproofing.
The deck on the back of your house can also be made from marine plywood. With initial staining and sealer, the deck could last for decades with easy and infrequent maintenance every 2 or 3 years.
5. Bathroom and Kitchen Walls and Subflooring
The two areas of the home that are the most prone to moisture in the kitchen and the bathroom. It is inevitable that you will spill something on the kitchen floor or have a water splash on the wall. In the bathroom, you have a shower, and a tub or toilet can overflow. Using marine plywood will prevent your floor from rotting and deforming.