Formwork is used in concrete construction as the frame for a structure in which fresh concrete is poured to then harden and take on the desired shape. Aesthetic of concrete surfaces can be varied with different formwork sheathing (e.g.
Concrete structures are built using formwork, which serves as a frame for pouring fresh concrete that hardens into the desired shape.  The appearance of concrete surfaces can be customized by using different types of formwork sheeting.