Since the construction is new, it is necessary to check the alkalinity of the plastered surface. The same can be checked using ph paper (available in the market). If the alkalinity is high i.e. more than 12 then do not paint, wait for some time. If alkalinity is between 8-11, then painting can begin using the recommended painting system (check on Asian Paints website). Ensure there is no leakage/seepage, cracks on the walls or will affect the paint during or after monsoon.