Gypsum Plaster : Advantages and Disadvantages Happho
Yes, Gypsum can be used for Internal Roof Plastering. But Gypsum is not leak proof. IF there is any leakage in the top slab the gypsum will fall off. The same would happen even if you treat your slab with cement plaster. The best way is to treat your top slab (terrace) to ensure no water leakages occur.