How long should we leave the concrete roof slab before further construction?

There is no need to wait longer than max. 4 days before taking up further construction.

Let’s elaborate on the details.

After slab is cast, ponding needs to be done on the slab. The bunding with mortar mix takes around a day or two.

The starters are cast on the 4th day onwards.

First lift of columns takes around 7 days and then remaining work is sequentially taken up.

Having said this,the conclusion is that the further construction can be taken up immediately after casting the slab.

Hope you are clear with the sequence now.