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Skimming and plastering

Plastering

Plastering has three purposes: to provide wear resistance to the wall, to strengthen the fire resistance of the building materials, and to give the wall a pleasing look. Plastering of higher quality need more expertise. On clay tiles, rough masonry, and porous bricks, two coats are ideal. Lime plasters, cement plasters, and gypsum plasters are the three forms of plasters. Calcium Hydroxide (Lime) and sand make up lime plaster. Water is added to Calcium Sulphate to make gypsum plaster (Plaster of Paris). Cement plaster is created by mixing cement, sand, water, and a suitable plaster together. On masonry walls, cement plaster is normally put first, followed by gypsum or lime plaster.

Skimming

Skim coating is a process that involves applying a thin layer of plastering technique. Out of many skim mixtures, the widely used mixture is made up of lime putty and sugar sand. Skimming is a thin coat of plastering layer applied to the existing plaster to upgrade the surface. Skimming is very difficult to do; it needs a greater skill to make the surface smooth. The thickness of the skimming layer is decided by the requirement of the client, and it can be varied from a thin layer to a thick layer. The white layer of lime applied on the rough cement plaster is called a skim coat. People use different techniques to level the surface, depending on their level of expertise. On top of the skim coating, a paint coat is applied to make the surface more attractive.