In order for the screed not to cover the hillocks and divorces, and also does not lose its strength — the permissible norm of water in the solution should not exceed. To increase its plasticity and relieve alignment, you can apply special additives that allow you to achieve these qualities with a decrease in the amount of water. To determine the required amount of water in the solution, you can use special devices, however, an experienced builder without much difficulty and reasonable devices will be able to determine the sufficiency of water in the mixture, which should be similar to sour cream or dense dough, and do not have lumps.