Finished Plaster

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes10 min read

What Is Finished Plaster?

Once the walls are constructed, the next operation which follows is Plaster Finishing. It is done to ensure the evenness of the top surface of the walls and to achieve an aesthetic finish.

Use of mortar to cover the wall surfaces of readily constructed walls and ceilings in order to achieve an elegant and even finish. In this article, we will be discussing various types of plaster finishing and their properties.

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Plaster Finishes

In this article, we will be discussing various types of plaster finishings and their properties.


Types of Plastering Finishes

Following are the 10 Types Finished Plaster,

  1. Pebble Dash Plaster Finish
  2. Scrapped Plaster Finish
  3. Textured Plaster Finish
  4. Stucco Plaster Finish
  5. Exposed Aggregate Plaster Finish
  6. Waterproof Plaster Finish
  7. Smooth Coat Finish
  8. Sand Faced Finish
  9. Rough Cast Finish or Spatter Dash Finish
  10. Depeter Finish

Read More: Vitrified Tiles – Pros & Cons of Vitrified Tiles


1. Pebble Dash Plaster Finish

It is a Plaster Finish in which small pebbles or crushed stones of suitable size (generally varying from 10 to 20 mm) are thrown onto a freshly applied final coat of mortar and left exposed.

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Pebble Dash Plaster

The mortar for the final coat is usually made by mixing cement and coarse sand in the mix proportion of 1:3 and is placed in about 1 mm thickness.

The pebbles used for dashing should be well washed and thrown wet onto the final coat. The pebbles may be tightly tapped into the mortar with a wooden float or with the flat of the trowel.

This finish of plaster possesses all the advantages of the roughcast finish and is recommended in similar conditions. Pebbledash plaster finish is mostly used for covering exterior walls and provide an aesthetic appearance to the structure.


2. Scrapped Plaster Finish

In many homes to create a good blend of smooth and rough surfaces, a scrapped plaster finish is created. It is a plaster in which the final coat, after being leveled and allowed to stiffen for a few hours, is scrapped with a steel straight edge old saw blade or other such tools to remove the surface skin.

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Scrapped Plaster Finish

Various types of scrapped finished can be obtained by using different types of tools in different manners.

In this plaster finish, the final layer is usually 6 to 12 mm thick of which about 3 mm is removed in the scrapping process. The scrapping is done after the setting of the final coat has taken place.

In the process of scrapping, the surface skin of the mortar is removed to expose aggregate and the texture obtained depends upon the grading aggregates used in the final coat. In this plaster finish is less liable to crack than the plain finish.


3. Textured Plaster Finish

A textured plaster finish can be typically found on boundary walls or part of a feature wall to create a textured interior décor installation.

A textured plaster finish is created by making use of stucco plastering, finished with a rough surface but often smoothed over to create repetitive patterns.

For textured finish mix of sand, cement, lime, and water used blended with various additives such as fibers and synthetics acrylics, and even coloring pigments.

In this finish, ornamental finish or textured surfaces are produced by working with various tools on the freshly applied final coat. This finish possesses all the advantages of the rough finish.


4. Stucco Plaster Finish

Stucco plaster finish belongs to a type of plaster that provides a superior finish. This plaster can be applied for inside as well as outside surfaces.

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Stucco Plaster

It is usually placed in three coats which make the entire thickness of the plaster roughly 25mm.

The first coat is known as scratch coat; the second one is a finer coat of brown coat and the third is known as a white coat or finishing coat.


5. Exposed Aggregate Plaster Finish

White and colored marble chips shall be of 6 mm to 12 mm size shall be used which obtained from crushing hard marble stone.

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Exposed Aggregate Plaster Wall

Exposed aggregate finish plaster shall be 20 mm thick. The procedure of application shall be the same as for the sand-faced finish. Mix proportion should be 1 cement: 1 marble chip and the pebbles to be used shall be well washed and drained.

The admixture shall be thrown wet onto the undercoat while it is still plastic using a strong whipping motion at right angles to the face of the wall. Loose mortar on the top surface shall be cleaned or removed by washing / brushing with a water jet.


6. Waterproof Plaster Finish

Cement waterproof compound of approved make and manufacture shall be used for plastering. These compounds shall conform to IS:2645.

Use of admixture consists calcium chloride shall not be permitted. The material should be brought to the project site in its original packing.

The compound shall be well mixed with dry cement in the proportion of 3% by weight or as recommended by the manufacture.

Care shall be taken while mixing, to see that waterproofing material gets well and integrally mixed with cement and does not run out separately on the addition of water.

Read More: Construction Drawings | Types of Construction Drawing Used In Building Construction


7. Smooth Coat Finish

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Smooth Coat Finish

This type of plaster finishing is smooth in nature with leveled surface. The proportion of 1:3 is used for Sand and cement for making mortar used in finishing.

The application of mortar to the wall is done using wooden float.


8. Sand Finish Plaster

This plaster finishing is usually completed in 2 coats of mortar mix. The ratio of cement sand is kept 1:4 in mortar for the first layer with 12mm thickness.

Initially, the first layer is applied and then cured for 7 days, which is followed by the second layer with a thickness of 8mm.

As per requirement, the ratio is kept at 1:1 for sand and cement mixture. Use of sponge is done after when the layer is wet to add the required characteristics.


9. Rough Plaster

Rough finishing of plaster requires a Cement Sand Aggregate ratio of 1:1:3 for finishing work, having a coarse aggregate size of 3mm to 12 mm.

In this Finishing of plaster surface, the mortar mix splashed on the wall, and then it is finished rough with the help of float made of wood.

This finished plaster is more durable, waterproof and crack proof and crazing proof.


10. Depeter Finish

It is like most last finishing plaster coat which is having a thickness of around 12 to 15 mm for a good quality finish.

The materials of Gravel Plinth are compressed to the required degree manually after the application of mortar. Gravel plinth could be used in different colors and shapes to give a colorful appearance to the wall.


Wall Plaster Material

To obtain the required characteristics for surfaces such as aesthetic, Heat insulation, durability, and much more properties there is the necessity of adding some special materials with cement paste.

The followings are the wall plastering materials,

  1. Acoustic Plaster
  2. Asbestos Marble Plaster
  3. Barium Plaster
  4. Granite Silicone Plaster
  5. POP or Gypsum Plaster
  6. Keene’s Cement Plaster

1. Acoustic Plaster

There is usually a need to add gypsum in mortar mix for surface finishing to resist the formation of honeycomb. In the process of formation of honeycomb, the surface coat is likely prone to undergo chemical reaction resulting in the formation of gas bubbles which in turn leads to the formation of small openings on the surface which eventually looks honeycomb-like structure.

The acoustic plaster has small pores opening it which absorb sound. Therefore, Types of plaster finishes are most used to cover a cinema hall and media room to a minimum the eco echo effect.


2. Asbestos Marble Plaster

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Asbestos Marble Paster

Asbestos Cement in addition to crushed fine marbles mixed with cement to obtain a perfect Surface Finish.


3. Barium Plaster

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Barium Plaster

X-ray cabines are very much prone to radioactivity which enforces the mixing of barium soleplate in mortar during the finishing works to ensure the safety of people working in such areas from radioactivity.


4. Granite Silicone Plaster

It is a plaster finish achieved by mixing silicon and granite with mortar. Use of such plaster finishes is done for the constructions with superior characteristics.

It is anelastic in nature and quick in the setting. This plaster eliminates cracks on the surface


5. Gypsum Plaster

What Is Finishes Plaster | 10 Types of Plastering Finishes | Exterior & Interior Plaster Finishes
Plaster Of Paris

Plaster of paries is obtained by heating gypsum at 165° to 170° degree temperature. Plaster of plaster is get liquified within 5-8 minutes of heating

While Using POP appropriate retarder is combined with it to enhance the setting time of mortar. For crack repair and ornamental work, a POP is used with lime for good bond strength and finishing.

It is a lightweight, soundproof, and fire-resistant material used in construction.

Read More: What is Gypsum Plaster- Types, Use, Pros & Cons


6. Keene’s Cement Plaster

For manufacturing Keene’s Cement Plaster, POP is mixed with alum in fixed proportions. These types of plaster used for decorative purposes as it looks attractive after hardening which when forms a polish like white glass after hardening in few days.


FAQs

What Is Plaster?

Plaster can be defined as a covering material or protective layers applied on walls and ceilings. Plaster wall finishes have the ability to last longer than ordinary paint jobs or wallpapers.

Types of Plaster Wall Finishes

Different Types of Plaster Finishings are listed below,
1. Pebble Dash Plaster Finish
2. Scrapped Plaster Finish
3. Textured Plaster Finish
4. Stucco Plaster Finish
5. Exposed Aggregate Plaster Finish
6. Waterproof Plaster Finish
7. Smooth Coat Finish
8. Sand Faced Finish
9. Rough Finished plaster
 10. Depeter Finish

Types of Plaster?

Various Plastering types are,
1. Acoustic Plaster
2. Asbestos Marble Plaster
3. Barium Plaster
4. Granite Silicone Plaster
5. Plaster of Paris or Gypsum Plaster
6. Keene’s  Cement Plaster

Wall Plastering Materials

The following are various wall plaster materials,
1. Acoustic Plaster
2. Asbestos Marble Plaster
3. Barium Plaster
4. Granite Silicone Plaster
5. POP Gypsum Plaster
6. Keene’s  Cement Plaster

Types of Plaster Finishes for Walls

The following are different wall plaster finishes,
1. Pebble Dash Plaster Finish
2. Scrapped Plaster Finish
3. Textured Plaster Finish
4. Stucco Plaster Finish
5. Exposed Aggregate Plaster Finish
6. Waterproof Plaster Finish
7. Smooth Coat Finish
8. Sand Faced Finish
9. Rough Cast Finish or Spatter Dash Finish
 10. Depeter Finish


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