In construction, 18mm plywood is often used as a subfloor or roof sheathing material. Its strength and durability make it ideal for supporting the weight of floors and roofs, as well as for withstanding the elements.
Plywood is also used as a sheathing material for exterior walls, where it provides a stable base for insulation and cladding. It can be cut and shaped to fit around windows and doors, and can be finished with a variety of coatings to protect it from moisture and weathering.
Another common use for 18mm plywood in construction is as a formwork material for concrete. Plywood forms can be easily cut and shaped to create custom shapes and sizes, and can be reused many times.