Get In Touch

Get Answer To Your Queries

Select a valid category

Enter a valid sub category

acceptence

What is Plastering Thickness for the Inner and Outer Walls?

Share:

Key Takeaways

 

  • Internal plaster thickness is usually between 10 and 15 mm, depending on the type of wall and surface preparation.
 
  • External plaster thickness typically ranges from 15-25 mm to adequately protect against environmental elements.
 
  • The outer wall plastering ratio is a key factor in determining the strength and durability of the plaster.
 
  • Maintaining a uniform plaster thickness of wall is crucial for the structural integrity and appearance of the wall

Plastering thickness is an essential construction process involving applying a protective and decorative coat to walls and ceilings. The thickness of plastering is crucial for both the appearance and durability of the surface. This blog explores the recommended plastering thickness for internal and external walls, the process involved, and the factors influencing it.

 

 

Internal Wall Plastering

 

What is the Plastering Thickness for Internal Wall Plastering?

For internal walls, the plastering thickness generally ranges from 10 to 15 mm. This thickness can vary based on the type of substrate, the condition of the wall, and the specific requirements of the project.

 

  • Single coat plaster: For a smooth, level surface, a 10 mm thickness is often sufficient.
 
  • Double-coat plaster: A two-coat application with a total thickness of around 15 mm is recommended when the wall surface is uneven or requires additional strength.

 

Plastering Process

The plastering process for internal wall thickness involves several key steps:

 

  • Surface Preparation: The wall surface should be cleaned and wetted to remove dust and ensure better adhesion.
 
  • Applying the First Coat (Scratch Coat): A 10 mm thick coat is applied to the surface and left to set.
 
  • Applying the Second Coat (Finish Coat): A second coat of about 5 mm is applied over the first coat if required. This coat is smoothed and leveled to achieve the desired finish.
 
  • Curing: The plastered surface is kept moist for several days to allow it to set properly and prevent cracks.

 

Factors Affecting Internal Wall Plaster Thickness

Several factors can influence the plaster thickness of wall for internal plaster:

 

  • Wall Material: Brick, concrete, or block walls may require different thicknesses depending on their surface texture and absorption properties.
 
  • Surface Evenness: Uneven surfaces require a thicker plaster to create a smooth, level finish.
 
  • Purpose of Plastering: Decorative finishes or soundproofing may necessitate variations in internal wall plaster thickness.

 

 

External Wall Plastering

What is the Plastering Thickness for External Wall?

External wall plastering generally requires a thicker coat, ranging from 15 to 25 mm, with the plastering thickness as per IS code typically guiding these measurements. The additional thickness helps protect the building from weather elements such as rain, wind, and extreme temperatures.

 

  • A base coat of about 12-15 mm is applied initially.
 
  • A finish coat of 8-10 mm is then added, bringing the total thickness to 20-25 mm.

 

Plastering Process

The process for external plastering involves:

 

  • Surface Preparation: Clean the wall surface and apply a bonding agent if needed.
 
  • Base Coat Application: A 12-15 mm thick base coat is applied and allowed to dry slightly.
 
  • Finish Coat Application: An 8-10 mm thick finish coat is applied over the base coat, smoothed, and textured as required.
 
  • Curing: Like internal plaster, external plaster needs to be cured by keeping it moist for at least a week to ensure proper setting and durability.

 

Factors Affecting External Wall Plastering Thickness

External wall thickness is influenced by:

 

  • Climate: Areas with harsh weather conditions may require thicker plaster for better protection.
 
  • Wall Material: The type of material used in external walls, such as brick, concrete, or stone, affects the required plaster thickness of walls.
 
  • Outer Wall Plastering Ratio: The cement-to-sand ratio in the plaster mix plays a crucial role in determining the strength and durability of the external plaster.
 
  • Structural Requirements: Buildings in earthquake-prone areas may need additional plastering outer wall thickness for added strength.

 

 

Tips for a Better Plaster Finish

Achieving a smooth and durable plaster finish requires attention to detail and proper technique. Here are some tips to ensure a better plaster finish:

 

  • Surface Preparation: Always clean and dampen the wall before applying plaster to enhance adhesion.
 
  • Consistent Mixing: Use consistent water-to-plaster ratios to avoid lumps and achieve a uniform texture.
 
  • Proper Curing: Ensure adequate curing to prevent cracks and increase the strength of the plaster.
 
  • Use Quality Materials: High-quality plastering materials ensure a better finish and longevity.

 

In conclusion, the plastering thickness for both internal and external walls plays a crucial role in the durability, appearance, and overall integrity of a building. While internal plastering typically ranges from 10-15 mm, external plastering requires a thicker application of 15-25 mm to protect against environmental elements. By understanding the process and factors affecting plaster thickness of walls as per IS code, one can ensure a smooth and long-lasting finish.

Frequently Asked Questions

 

1. Can the thickness of plastering affect the overall durability of the wall?

Yes, the thickness of plastering significantly impacts the wall's durability. Thicker plaster provides better protection against environmental elements and wear, especially on external walls.

 

2. Why is it important to maintain uniform plastering thickness?

Maintaining uniform plastering thickness ensures structural integrity and a smooth finish. Uneven plastering can lead to cracks, weak spots, and an unattractive appearance.

 

3. What is the standard thickness of plastering?

The standard thickness varies: for internal walls, it's generally 10-15 mm, while for external walls, it's 15-25 mm.

 

4. Can plastering thickness be adjusted after application?

Adjusting plaster thickness after application is challenging and can lead to cracks or weak spots. It's best to ensure the correct thickness during the initial application.

 

5. What are the types of materials used in plastering?

Common materials include cement, lime, gypsum, and sand. The choice depends on the type of wall and the desired finish.

 Related Articles

View All Articles
View All Articles

 Recommended Videos

View All Videos
View All Videos

  Tools for Home Building

Cost Calculator

Every home-builder wants to build their dream home but do so without going over-budget. By using the Cost Calculator, you’ll get a better idea of where and how much you might end up spending.

 

logo

EMI Calculator

Taking a home-loan is one of the best ways to finance home-building but home-builders often ask how much EMI they’ll need to pay. With the EMI Calculator, you can get an estimate that will help you better plan your budget.

logo

Product Predictor

For a home builder, it is important to find the right store where one can get all the valuable information about home building. Use the Store Locator feature and visit our store for more information on home building.

logo

Store Locator

It is important for a home builder to select the right products during the initial stages of constructing a home. Use the Product Predictor to see which products will be needed while building your home.

logo
Loading....