As per the Concrete Society, “Formwork is the term given to the mould into which concrete is poured. It is generally made of timber or steel, the surface in contact with the concrete being selected to give the required finish. The strength of the formwork and its associated falsework must be sufficient to support the weight of the wet concrete without significant distortion.”
Formwork is usually removed once the concrete has gotten good strength. At times, depending upon the situation, the formwork may be left in on a permanent basis.
The most common materials used to aid formwork are steel and timber. In the construction industry, this is a very common practice.
One of the much in use formwork techniques is shuttering. For this, plywood that is water-resistant is used. When deciding on the type of formwork, the temperature at which the concrete is poured, and the type of concrete is the deciding factor.