Our hardwood structural plywood can be used as exterior and interior applications, provided they are sealed correctly. External plywood board is a versatile material, the layers have a negligible core gap which limits the amount that can get into the plywood. It is moisture-resistant and water-resistant and is perfectly suited for structural tasks where occasional wetting may occur. We also carry marine plywood on our site which is even better suited to outdoor use. As is the case with all our materials, correct installation should be ensured in order for materials to work correctly.