5-25 Mm Thickness High Quality Modified Marine Plywood - 0.85 Density

The grade of marine types makes a difference. Marine-grade wood must have a B-grade or better according to the APA a Engineered Wood Association and must have a B-grade or better which we'll explore in the "More Details" part of this guide. This type of wood is one of the most well-built high-graded plywood available.
Weather and water can cause mold mildew and damage in marine-grade wood. Because it isn't treated with chemicals rot and decay can be an issue unless you use a pressure-preservative as the APA recommends.
This wood must have no knotholes in any of its plies and employ a top-performing water-resistant glue between plies to be classified as marine-grade. If the wood becomes damp due to weather or rainy conditions the glue will not stop working.
Marine-grade timbers are commonly seen on gazebos planter boxes and seats among other outdoor furniture and decorative items.