After pouring and finishing the slab, you should wait 24-48 hours before removing concrete forms. You can remove the formwork once the concrete has enough strength to keep it from cracking. Concrete naturally contracts as it cures, so it should pull away from the forms and make them easier to remove.
How Long Do You Need to Leave Concrete Forms On?
Concrete forms are an important component of any construction project, as they provide a structure and support for the concrete to be poured into. But once the concrete has been poured, how long do you need to leave the concrete forms on?
The answer to this question depends on several factors, including the type of concrete used, the size and shape of the forms, the curing process, and the environment in which the concrete is being cured. Generally, concrete forms should be left in place for at least 24 hours, but in some cases, it may be necessary to leave them on for up to three days.
The first factor to consider is the type of concrete used. If the concrete is a low-strength mix, it will take longer to cure and the forms should be left in place for a longer period of time. High-strength concrete, on the other hand, can be ready in less time and the forms may not need to be left in place for as long.
The size and shape of the forms also play a role in how long they should be left in place. Large forms will take longer to cure than smaller forms, and oddly-shaped forms may require additional time. This is because the concrete will take longer to reach its full strength