Two types of plasterboard repairs may be needed. If it’s a small area, a bit of joint compound or spackle can fix it. But if the area is larger, a piece of plasterboard will have to be replaced. Ceiling plasterboard is 1.5 cm (5/8 inch) thick and a large area can be quite heavy – a 1.2 by 2.4 m (4 by 8 foot) sheet weighs 34 kg (75 lb). Consider the size and whether you are physically comfortable with taking down one piece and putting up a new one.