What is Plastering | Types, Requirement & Properties - Ishwaranand

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What is Plastering | Types, Requirement & Properties

Plastering
What is Plastering
Types, Requirement & Properties

Plastering, object of plastering, A requirement of good plaster, Types of plaster finishes, Preparation of surface for plastering, Types in plastering,

 An object of plastering

  • To protect external surfaces
  • To give smooth, clean surfaces
  • Prevent entry of dust into the joint
  • To give a decorative effect
  • Prevent defective workmanship

A requirement of good plaster

  • It should be Hard & durable
  • It should Cheap
  • Desirable to apply it during every weather condition
  • Effectively resist the penetration of moisture
  • Should remain strong during all variations in seasons.

Types of plaster finishes

  1. Smooth cast finish
  2. Sand face finish
  3. Roughcast finish or spatter dash finish

Preparation of surface for plastering

  • The surface should be uniform.
  • The durability of plaster depends upon the bonds with a background wall.
  • Group the projections which extend by more extra than 15 mm. from the masonry wall face are knocked off.
  • Dust and loose mortar are brushed out of the raked joints.
  • The surface should be free from oil & greasy spots.
  • Efflorescence is removed by brushing and scraping.
  • In the case of old walls, the smoothness of the surface is destroyed.
  • kept wall wet before plastering is start

Types in plastering

  1. Cracking
  2. Blistering of plaster
  3. Crazing
  4. Efflorescence
  5. Flaking
  6. Peeling
  7. Popping
  8. Uneven surface

Cracking

  • Due to Thermal expansion or shrinkage or drying of material, there can appear the cracking in structure.
  • Due to bad Workmanship and the method of application of the mortar, there can appear the cracking in structure.
  • If Old surface not being properly prepared there can appear the cracking in structure.
Plastering, object of plastering, A requirement of good plaster, Types of plaster finishes, Preparation of surface for plastering, Types in plastering,

Blistering of plaster

  • Formation of small patches of plaster swelling, due to improper slaking of lime particles in the plaster.
Plastering, object of plastering, A requirement of good plaster, Types of plaster finishes, Preparation of surface for plastering, Types in plastering,

Crazing


Plastering, object of plastering, A requirement of good plaster, Types of plaster finishes, Preparation of surface for plastering, Types in plastering,

Efflorescence

Plastering, object of plastering, A requirement of good plaster, Types of plaster finishes, Preparation of surface for plastering, Types in plastering,

Flaking

  • Formation of a very loose mass of plaster surface due to poor bond.

Plastering, object of plastering, A requirement of good plaster, Types of plaster finishes, Preparation of surface for plastering, Types in plastering,

Peeling

Plastering, object of plastering, A requirement of good plaster, Types of plaster finishes, Preparation of surface for plastering, Types in plastering,

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