What is the Thickness of Plastering?

Hi Dev. The plastering thickness for internal walls is approximately 12.5 mm. However, the thickness of the plaster coat ranges from 3 mm to 15 mm, based on the number of coats and the type of coat. So, I will share a detailed chart with you which will highlight the plaster thickness based on these two parameters. You can find them below.

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What is the Plaster Thickness in Wall?

According to the Indian Standard 1661, here are the thicknesses needed for internal walls:

The thickness of the plaster is determined by the surface and the purpose/ Thicker plaster is applied on uneven walls to cover large wrinkles. While thin plastering is done to get a smoother finish and showcase the features of the wall beneath. I hope you now know what is the thickness of plastering;. 

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Some related information:

How to Seal plaster Before Painting?

While getting painting on our walls, we wondered about the standard thickness of plaster on internal wall. It was after we asked the painter we got to know that the thickness depends on the kind of wall we are dealing with and what is its purpose. Ideally, the plaster thickness of internal walls is around 12mm. Let me share more on the subject with you here.

In my experience, the thickness of plastering is a critical consideration that varies based on the type of wall and the intended purpose of the space. As I said, for the standard thickness of plaster on internal wall, a common practice is to apply a plaster thickness of around 12 to 15 millimeters. This provides a smooth and even finish while maintaining cost-effectiveness.

However, when dealing with external walls, the thickness becomes a more significant factor due to exposure to the elements. External plastering often requires a thickness ranging from 20 to 25 millimeters to enhance durability and protect against weathering.

It's important to note that achieving the right thickness is not a one-size-fits-all approach. Factors such as the substrate, building codes, and the type of plaster used can influence the ideal thickness. Consulting with a professional or doing thorough research specific to your project is advisable.

Determining the standard thickness of wall plaster isn't a number; it's a science. I finally gained a clearer perspective on achieving the perfect finish for my walls.

Read More:

Plastering is a construction process where a thin layer of plaster material is applied to the interior and exterior surfaces of walls and ceilings in buildings. It serves both decorative and functional purposes, providing a smooth finish, concealing imperfections, and protecting the underlying structural elements from damage and deterioration. But knowing what is the thickness of plastering is important. If you do not know about it, you can read my comment and get an idea.

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What should be the internal and external wall plaster thickness?

In general, the plastering thickness for the interior walls varies from 6mm to 12mm and for the exterior walls, it is 18mm to 20mm. So this is the plaster thickness in mm I am aware of. The specific thickness may vary based on regional building codes, wall material, and environmental conditions. Thicker plaster may be applied for levelling or added protection. Consulting with a local construction professional or architect is essential in determining the precise plaster thickness required for your project, ensuring structural integrity and durability. Thicker plaster may be used if the wall surface is uneven and requires more levelling, so let an expert decide. 

Plastering is done for:

• Smooth Surface

• Enhanced Durability

• Weather Protection

• Aesthetic Appeal

• Thermal Insulation

So choose ythe plastering thickness as per your requirements.