What is the best material to use for concrete forms?

What is the best material to use for concrete forms?

Plywood is the best material for building concrete forms because it retains its shape and integrity following prolonged exposure to wet concrete. Cut OSB panels tend to swell on exposure to water. Plyform panels are the best choice since they’re specially engineered for concrete forming.

Can you use metal for concrete forms?

In addition to timber, there are a few other common materials used to make concrete forms. Steel is regularly used in heavy civil construction to create thin steel plates, which can be held together with clamps or with fasteners to support broad concrete projects.

How thick do concrete forms need to be?

Most projects use one of two common board sizes: 2 by 6 inches or 2 by 12 inches. 2 by 6 boards should suffice for most slabs up to 5 inches thick. However, if a contractor intends to install a slab with thickened edges, then 2 by 12 boards will be required to contain the extra-deep concrete.

What are the different types of concrete forms?


  • Wood Forms for Concrete Slabs. Wood forms are the most basic and oldest of concrete formwork slabs and are still heavily used when constructing smaller structures.
  • Concrete Wall Forms.
  • Insulated Concrete Forms (ICFs)
  • Foam and Decorative Concrete Forms.

What do you use for flexible concrete forms?

Masonite siding has often been an option for forming curves — it’s stiff, yet bendable. Landscape edging material made out of metal is what some contractors use because it’s easy to find. “Kerfs” or grooves in two-by-fours allow the wood to bend, or rip thinner plywood to the desired height.

What is the best plywood for concrete forms?

Virtually any “Exterior” rated APA panel can be used for concrete formwork because all such panels are manufactured with moisture resistant adhesive. For concrete forming, the plywood industry produces a special product called Plyform®, which is recommended for most general forming uses.

When can I remove forms from concrete slab?

Walls and columns can be removed after about 24-48 hours. Slabs, with their props left under them, can typically be removed after 3-4 days.

Are concrete forms necessary?

Crucially, forms must also be level where appropriate and must have adequate support or bracing. Careful construction of concrete forms ensures that the finished concrete product will be correctly shaped, which affects its overall strength and durability.