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In plastering, the 1st coat is called ___________ and its thickness should be _______ mm.
  • a)
    Undercoat, 6-9
  • b)
    Floating coat, 6-9
  • c)
    Floating coat, 10-15
  • d)
    Undercoat, 10-15
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In plastering, the 1st coat is called ___________ and its thickness sh...
The first coat applied to the newly wall is called as “undercoat”.
In case of brick masonry, the thickness of first coat plaster is in general 12 mm and in case of concrete masonry this thickness varies from 9 to 15 mm.
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In plastering, the 1st coat is called ___________ and its thickness sh...
Plastering and the First Coat

Plastering is a process of covering the internal and external walls and ceilings of a building with a thin layer of plaster. The main purpose of plastering is to give a smooth, even, and durable finish to the walls and ceilings. The plastering process is done in two coats, namely the first coat and the second coat. In this question, we are asked about the first coat.

The First Coat

The first coat of plastering is also known as the undercoat or scratch coat. It is the first layer of plastering that is applied to the surface of the wall or ceiling. The main purpose of the first coat is to provide a smooth and even surface for the second coat to adhere to. The thickness of the first coat is important as it determines the quality and durability of the plastering.

The Thickness

The thickness of the first coat of plastering should be between 10-15mm. This means that the layer of plaster should be 10-15mm thick after it has been applied to the surface. The thickness of the first coat is important as it determines the strength and durability of the plastering. If the first coat is too thin, it may not provide a strong enough surface for the second coat to adhere to. If the first coat is too thick, it may crack or shrink as it dries, which can cause problems with the second coat.

Conclusion

In conclusion, the first coat of plastering is an important part of the plastering process. Its purpose is to provide a smooth and even surface for the second coat to adhere to. The thickness of the first coat should be between 10-15mm to ensure the strength and durability of the plastering.
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In plastering, the 1st coat is called ___________ and its thickness should be _______ mm.a)Undercoat, 6-9b)Floating coat, 6-9c)Floating coat, 10-15d)Undercoat, 10-15Correct answer is option 'D'. Can you explain this answer?
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