Before going to different types of plaster and where they are used, it will be relevant to know what plasterwork is. Plasterwork refers to any construction or interior decoration or ornamentation done with plaster. This includes plastering on interior or external walls and decorative mouldings on ceilings or walls. Plasterwork or rendering as it is sometimes called has been around for centuries. The more artistic three-dimensional plastering or stucco has graced houses of noblemen for ages.
Here are the types of plasters that are most commonly used.
Lime plaster is composed of hydrated lime, sand and water. When lime is used as a binding material for construction, it is called lime plaster. Even though lime plaster is somewhat similar to lime mortar, the primary difference between the two lies in the various ways they are used rather than the composition. Mortar for lime is made by mixing lime and sand in equal proportions. To increase the strength of the material a little cement is added to it.
Like lime plaster, when cement is used as a binding material for construction, it is called cement plaster. This type of plaster is mainly used in regions with heavy rainfall and moist and humid climates because of its moisture proof properties. Cement plaster is applied in one coat, and the thickness depends on the type of construction. In normal circumstances, the thickness of the coat is 12 to 15mm up to 20mm but for RCC surfaces, a 6mm thickness of plastering or 1:3 or 1:4 ratios is advisable.
Stucco is the name given to a type of decorative plaster with a very smooth and excellent finish. It can be used both in exterior and interior walls. Plasterers opting for this method apply three coats of plaster with the total thickness being about 25mm. The first coat is known as the scratch coat, the second as fine coat or brown coat and the third as the white coat or the finishing coat. Visit the website of a well-known plastering company in your location for more details.
Mud plaster consists of two coats; the first is about 18mm thick and the second is 6mm. The surface where the mud plaster is to be applied has to be prepared similarly to that where lime plaster or cement can be applied.
Plastering is considered to be a fine art, and the aesthetic beauty of a structure is largely based on the type of plaster used and the skills of the plasterer.