A gypsum wall is the best option where organic or river sand is not readily available for construction. Kanish Plasters supplies the best gypsum plasters for you to use in your home construction. The majority of modern walls are made of gypsum which comprise dry plaster placed between two layers of thick paper, resulting in an easier-to-install than standard trowel-applied plaster. When gypsum plaster is used, the wall may include 50% air! It makes it significantly lighter than regular plaster and makes installation easier. The Gypsum Wall may also be treated with a wax emulsion or asphalt to keep moisture out. Before the 1930s, traditional plaster came from limestone, but gypsum became popular due to its faster drying time. Lime plaster can take up to a year to thoroughly cure before painting or wallpapering it, but gypsum walls only need one to three weeks.