how long does it take for concrete foundation
Typical concrete takes 28 days (4 weeks) to cure. Prior to the 28 days concrete still has moisture in it that weakens the strength of the concrete. If you seal it prior to 28 â¦ days there is a chance you will be sealing in some of that moisture and hence weakening the integrity of the concrete.hat depends on the concrete, as well as weather conditions, and the load the concrete would be subjected to. Concrete gains strength over time and the usual benchmarks are 7 â¦ days, and 28 days. At 28 days concrete has usually cured to nearly its maximum strength.