Should the screed be laid as soon as possible after pouring the base slab?

Hello everyone,

we are currently renovating the chamber where the groundwater pump is located, which supplies the house with water, and a staircase to the upper floor.

Due to massive delays caused by unforeseen structural damage (ring foundation and moisture damage), we can no longer invest much time in drying.

Therefore, my question is: How early and as quickly as possible can a floating screed be laid after pouring the floor slab?

The conditions are as follows:

It is a well-ventilated, tall, and basically well-heatable room with the dimensions 3.03 m x 1.11 m x 5.00 m. The removed floor slab is to be restored by "eating up" 10 cm of concrete, after which a floating screed is to be laid. No floor covering will be installed on it for the next few months.

Afterwards, only a welder, bricklayer, and stair builder will come to do their work. The floor does not have to bear great forces since everything above is built into the wall, but I am afraid of covering the concrete too early with screed.

Thank you very much for your answers. If you have any questions, I am happy to answer them.

It's just a theory... Somehow forums are useless.

Thank you for no comments.

Regards

Try it in marriage "construction"-oriented forums, you'll find something there via Google

Why do you need the screed on top of the concrete?

Then just pour the concrete and let it cure. The stair builder should be able to work with spacer blocks etc.

Otherwise, there are additives for concrete that make it dry faster. In the worst case, you won’t get the moisture out from underneath anymore. I know a builder who also didn’t let it dry enough. The tiles in the living room still get moisture spots. After 10 years. This is not a basement but an intermediate ceiling.

But giving advice here without knowing the local conditions is actually nonsense. I would give the whole thing plenty of time to dry properly.

Therefore my question: How early and as quickly as possible can you lay a floating screed on the floor slab after it has been poured?

When it comes to strength, the "28-day" rule applies. Usually, the concrete is sufficiently cured (and sufficiently dry) by then.
Since you want to continue very quickly, I would personally start with the screed after 10 days and hope that it has dried enough by then.

I would personally start with the screed after 10 days and hope that it is sufficiently dried by then.

Hope dies last, as always!