Types of concrete form a unique building material that begins as a semi-solid but can be manipulated to assume almost any shape. This flexibility – combined with its ability to fill voids and resist pressure – is what makes it so useful in construction. But, the concrete must be contained in some way, and that’s where the formwork comes into play. Formwork is a set of barriers that holds fluid concrete in place and forces it to assume a specific shape, and there are many types of form systems available for different projects and purposes. From basic wood forms to specialty systems that impart insulation or even decorative effects, these forming systems vary in design and functionality.

Exploring the Types of Concrete Forms for Your Project

The type of concrete forms used in a project is often determined by the size of the pour, how much pressure the concrete will be under and if it must stay in place for long periods of time. Forms can be made from a variety of materials, including plywood and steel. Some are designed to be used for only a single pour, while others can be reused or even sold.

For smaller structures, such as patios, driveways, and sidewalks, contractors usually use wooden forms. These consist of a series of wooden boards that may be screwed or nailed together in the desired structure’s shape and into which wet concrete is poured. Once the concrete has hardened, or cured, the forms are removed to reveal the underlying concrete slab. For larger projects, such as walls or foundations, pre-manufactured forming systems are used. These are often made of insulated wood with a metal frame or are completely metal, and they bolt or stack together for various height configurations.