Plaster is a mixture of lime or gypsum. water, sand, and sometimes even fiber. It hardens to a smooth solid material that is used to coat ceilings and walls. Plastering a wall is a very easy task to accomplish. There is not really very much skill involved. The most important thing to get right when trying to do a good job of plastering a wall is probably to make sure to mix the right consistency of chemicals. The plaster is supposed to provide support to the wall on which it is applied. It is also key to remember to wet the surface before applying the plaster. This will ensure a better grip.
One should apply three smooth coats to ready the surface for wallpaper or paint. The first coat is called the scratch coat and it should be applied at a 3/8 of an inch in thickness. The reason it is called the scratch coat is because it is brushed with a comb to create a rough texture. The second coat is called the brown coat and it is applied directly to the scratch coat. This coat should also be applied with a thickness of 3/8 of an inch. This coat has a rough texture to it due to the sand that is mixed into it. The final coat is traditionally called a lime finish. This coat should have a thickness of only 1/8 of an inch. The lime putty is blended with water in a mixing board. The plaster should be lump-free and mixed to the proper consistency. To ensure that the plaster sets properly, water should be splattered across the surface of the plaster, twenty-four hours after finishing the job and for the next three to four days afterward.
Plastering is easy when one takes the time to do the job the right way.