POP ceilings (plaster of Paris) are heavier and require more labour and materials to install than gypsum wallboard. They are usually suspended from ceiling joints and involve towelling over plasterboard or are built upon wire lathe. They are more moisture-resistant than gypsum plaster of Paris and are more impact resistant, but they are also subject to shrinkage cracking and mould growth too, the issues that can be mediated more easily with special gypsum board products, available from Trimurti, the best gypsum board dealers in Delhi.