The 18mm Exterior Grade Class 3 Hardwood Plywood 2440mm x 1220mm (8′ x 4′) is a premium, heavy-duty plywood sheet designed for exterior use. Manufactured to BS EN636-3 standards, it offers excellent weather resistance and reliable performance in demanding conditions. It is ideal for floors, roofs, walls, hoardings, and temporary protection.
With its 18mm thickness, this hardwood plywood provides added strength, stability, and durability, making it a dependable choice for construction and trade applications where a tougher sheet is required. The smooth surface and square edges make it easy to cut, fix, and finish to suit a wide range of projects.
This weatherproof plywood is suitable for both professional and general use, but like all exterior plywood, it should be properly sealed on all faces and edges to help protect it from moisture and extend its lifespan.













