What Is Finished Plaster?
After the walls have been constructed, Plaster Finishing is the next step. This is done to ensure that the wall tops are even and to create an aesthetic finish.
To achieve a beautiful and uniform finish, use mortar to cover wall surfaces and ceilings that are already constructed. This article will discuss the properties of various types plaster finishes.
There are 10 types of plastering finishes with exterior and interior plaster finishes.
This article will discuss the various types of finishes and their properties.
There Are Many Types Of Plastering Finishes.
The following are the types of plaster finishes used in building construction:
- Pebble Dash Plaster Finish
There are 10 types of plastering finishes with exterior and interior plaster finishes.
This is a Plaster Finish where small pebbles (generally between 10 and 20 mm in size) or crushed stones are left exposed on a freshly applied coat of mortar.
Mortar for the final coating is typically made by mixing coarse sand and cement in a mix ratio of 1:3; it is then placed at a thickness of about 1 mm.
The pebbles for dashing must be thoroughly washed before being thrown onto the final coat. The pebbles can be tapped tightly into the mortar using a wooden trowel or float.
This plaster finish has all the benefits of roughcast and is recommended for similar conditions. Pebbledash is a plaster finish that is used to cover exterior walls, giving them a more aesthetic look.
- Scraped Plaster Finish
Scraped plaster is used in many homes for a blend of smooth and coarse surfaces. After the plaster has been leveled, and the surface allowed to harden for several hours, the final coat is scraped with an old straight-edged saw blade, or similar tools, to remove the skin.
Different types of tools can be used in various ways to achieve different finishes.
The scrapping is done after the final coat has been set. After the final coat is set, the scraping process takes place.
The surface of the mortar is scraped off to reveal the aggregate. The texture that results depends on the grade of aggregates used for the final coat. This plaster finish has a lower cracking risk than plain plaster.
- Textured Plaster Finish
The textured finish is usually found on the boundary wall or as part of an interior feature wall.
Stucco plastering is used to create a textured finish. It has a rough surface, but it’s often smoothed out in order to create repeating patterns.
A mix of sand and cement is mixed with water, acrylics and fibers to create a texture finish.
This finish is used to create ornamental finishes or textured surfaces by using various tools. This finish has all the benefits of the rough finish.
- Stucco Plaster Finish
Stucco is a type that offers a superior finish. This plaster is suitable for both inside and outside surfaces.
The plaster is typically applied in three layers, resulting in a thickness of 25mm.
The first coat, also known as the scratch coat, is the finer brown coat. The second coat is the white coat.
- Exposed Aggregate Plaster Finish
The marble chips should be 6-12 mm in size and obtained by crushing marble stones.
The thickness of the exposed aggregate finish plaster is 20 mm. The same procedure as that for the sandfaced finish shall be followed. The proportion of the mix should be 1 cement to 1 marble chip. Pebbles must be thoroughly washed and dried.
The admixture is thrown onto the undercoat wet while it’s still plastic, using a strong whipping movement at an angle of 90 degrees to the wall. The loose mortar should be removed or cleaned by using a water jet.
- Waterproof Plaster finish
Plastering shall only be done with cement waterproof compound from a manufacturer and make that has been approved. These compounds must conform to IS:2645.
The use of admixtures containing calcium chloride is prohibited. The material must be transported to the site in its original packaging.
Compound shall be mixed well with cement dry in a proportion of 3% or according to the manufacturer’s recommendation.
When mixing waterproofing material with cement, it is important to ensure that the two are thoroughly mixed and do not separate when water is added.
- Smooth Coat
The surface of this type of finish is leveled and smooth. For making finishing mortar, sand and cement are mixed in a ratio of 1:3.
A wooden float is used to apply mortar on the wall.
- Sand Finish Placement
The plaster is typically completed with two coats of the mortar mixture. For the first 12mm layer, cement sand ratio is 1:4.
The first layer of the coating is applied, then it is cured for seven days. Next, the second layer, with an 8mm thickness, is added.
The ratio of sand to cement is maintained at 1:1 as per the requirement. After the layer has been wet, a sponge can be used to give it the desired characteristics.
- Rough Plaster
For rough finishing, a Cement Sand aggregate ratio of 1:3 is required for finishing work. The coarse aggregate size should be between 3mm and 12mm.
This Finishing of the Plaster Surface involves splashing the mortar mixture on the wall and finishing it rough using a wooden float.
This plaster is waterproof, crack-proof and crazing-proof.
- Depeter Finish
For a high-quality finish, it is similar to the thickness of most final plaster coats.
After applying mortar, the materials are manually compressed to the desired degree. To give the wall a colorful look, you can use different colored and shaped gravel plinths.
Wall Plaster Materials
Cement paste must be mixed with special materials to achieve the desired characteristics of surfaces, such as heat insulation, durability and many more.
These are the materials that you can use to plaster your walls.
- Acoustic Plaster
In order to prevent the formation of honeycomb, gypsum is often added to the mix of mortar for the surface finish. The surface coat of the mortar is likely to undergo a chemical reaction that results in the formation gas bubbles. This leads to small openings appearing on the surface.
Acoustic plaster is characterized by small openings that absorb sound. The most common plaster finishes used in a media room or cinema hall are those that minimize the echo effect.
- Asbestos Marble Plaster
Asbestos Cement, finely crushed marbles and cement are mixed to achieve a perfect Surface Finish.
- Barium Plaster
The radioactivity of X-ray cabinets is very high, which makes it necessary to mix barium soleplate with mortar when finishing the work to protect people who are working in these areas.
- Granite Silicone Plaster
This plaster finish is achieved by mixing granite and silicon with mortar. These plaster finishes are used for superior constructions.
This plaster is elastic and fast-setting. This plaster eliminates surface cracks
- Gypsum Plaster
Gypsum is heated to a temperature of 165deg- 170deg. After heating, plaster of plaster becomes liquified in 5-8 minutes.
When using POP, a retarder should be used to increase the setting time. When cracks are repaired and ornamental work is being done, POP and lime are used to ensure a good bond and finish.
This material is lightweight, fire resistant, and soundproof.
- Keene Cement Plaster
In order to manufacture Keene’s Cement Plaster POP and alum are mixed in fixed proportions. These plasters are used as decorative materials because they look attractive and harden into a white polish after a few weeks.
Conclusion
Exterior plaster finishes offer both aesthetic and protection, protecting the building from the weather and enhancing its appearance.
Interior plaster finishes can enhance the aesthetics and functionality of an interior space. They provide a smooth, even surface that is suitable for other treatments, such as wall-papering or painting, and offer a variety of texture options. This allows for individualized interior design.
Plaster finishes are a key component in the creation of beautiful and functional environments.
Designers and architects can create inviting environments that meet design and function requirements by using exterior and interior plaster finishing.
For more info – https://www.benandsonspainting.co.nz/service/plastering/