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Most of the time it comes off the next day. Some will strip it the same day. I just think that is too soon.

Can depend on the mix design of the concrete and what type of cement is used. Can range from 5min to days. Concrete at precast plants that make sewer structures will remove the forms 5min after because of the mix design (0 slump / rapid setting / high strength gain). Bridge girders will be striped 12 - 24 hours after concrete has been placed (high early strength gain cement). Other form work in construction is based of cement type used in the mix design of the concrete or contractors decisions (1 or more days).

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13y ago
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14y ago

For sidewalks and other concrete surfaces, forms may be removed 1-1/2 to two days after pouring and finishing. Concrete "sets" pretty solidly after one day, but give it a little time to get harder, so that you won't damage the corners or surface while removing the forms. Waiting too long can make it difficult to "unstick" the forms from the sides of the concrete.

Concrete sets to about 90% of its strength in seven days, especially if kept wet during this time. After about a month, it will be about as strong as it will ever be. Concrete also varies by the ratio of the mixture of concrete to aggregate, and the amount of water it was mixed with. If you have doubts, your local concrete provider can give you more information. Weather can also have an effect.

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9y ago

It depends how hot it is outside...In Arizona in the summer you can remove them the same day (4 or 5 hours after finishing the floor)....otherwise I would wait until the next day.

You must also remember that concrete does not cure based off heat and "drying" out. Concrete cures and gains its strength through a process known as hydration. This is a reaction with the water and cement in the concrete. The floor should be covered to prevent moisture loss and aid curing. This would create quicker strength gain. Should be covered for 24hours before forms removed.

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12y ago

Depends on the mix of concrete. You can take the forms off as soon as the concrete sets. A good rule of thumb to know that it sets is if you touch it and it doesn't leave a mark (be careful to use gloves as some some people can get cement burns from wet concrete).

If you leave the forms on a little longer, that's a good thing. It will help protect edges and corners as it gets stronger. Most concrete mixes achieve 90% of strength within 7seven days.

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11y ago

Wait at least two days (48 hours) after pouring to remove form. Keep opn watering for at least one more day (if the foundation is large - tens of cubic meters . water for another 3 days after removing the form.

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How are forms built for concrete?

All forms should be well constructed.All forms should be carefully aligned.It should be subtle and firm.All forms should be securely braced and fastened together in their final position.


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Plywood would be very ideal for concrete forms given its ability to produce smooth surfaces and to be used repeatedly.


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What is a cat head used in concrete forming?

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