How Many m² Does a Sack of Plaster Mortar Cover? Find Out!

How many m² does one sack of plaster mortar cover? This question may have crossed your mind if you’re building or renovating a house.

For those unfamiliar with construction terms, plaster mortar is a ready-mix material commonly used to coat, smooth, and bond walls, whether made of red bricks or lightweight concrete blocks.

On the market, this product is usually sold in 40-50 kg bags, with coverage varying by brand and intended use.

Knowing how many square meters one sack of plaster mortar will cover helps make the construction job move efficiently and cost-effectively, and helps avoid the risk of running short or having excess material.

Do you want to know how to calculate it? Let’s dig into the following article!

How Many m² Does 1 Sack of Plaster Mortar Cover?

The coverage of 1 sack of plaster mortar for coating a wall depends on its spreadability. Meanwhile, the spreadability of plaster mortar varies by brand.

For example, 1 sack of 40 kg mortar can cover around 2.4 m² of a lightweight brick wall 1 cm thick, requiring 7-7.5 liters of water.

In general, 1 m² of wall requires ±20 kg of mortar, so 1 sack of 40 kg can cover around 2 m².

Calculating mortar requirements can help in determining construction materials, especially for estimating wall finishing costs.

Without proper calculation, the required volume of plaster mortar may exceed the project budget, leading to problems.

Mortar cement is more practical than conventional cement because it does not require sand for plastering. Mortar can be used as an adhesive for lightweight bricks, for plastering, and for finishing. Some types of mortar include:

Cement mortar.
Lime mortar.
Surkhi mortar.
Mud mortar.

All products are packed in sacks for easy storage. Additionally, other advantages of using mortar include:

Proper cement content.
Consistent quality, strength, and color.
Reduced mixing and labor costs.
Reduced waste.

Mortar is also known to be easy to apply, strong, quick-drying, rugged and durable, able to bond stones or bricks well, and relatively affordable.

Plaster Mortar Coverage

Plaster mortar coverage refers to the estimated area that can be covered by 1 sack of mortar with a specific thickness (generally 1 cm). The coverage rate is influenced by several factors, including:

Thickness of the plaster layer: The thicker the plaster, the smaller the area it can cover.
Wall surface condition: Rough or uneven walls require more mortar than smooth walls.
Type and brand of mortar: Each brand has a different composition and bonding strength, resulting in varying coverage rates.

This coverage serves as a general guide for calculating the amount of mortar needed when plastering walls.

Benefits of Knowing the Coverage

Understanding the coverage of plaster mortar provides several important advantages in wall plastering work. Here are some of the benefits of knowing mortar coverage:

Budget control: Knowing the coverage allows you to calculate mortar requirements accurately, enabling you to manage material, time, and cost budgets more efficiently. This helps prevent both waste and material shortages during the project.
Optimized scheduling: Coverage information also makes it easier to plan work schedules. With accurate estimates, the project can be carried out efficiently, and each stage can be completed on time, minimizing the risk of costly delays

How to Calculate Mortar Requirements for Wall Plastering

To find out how much mortar is needed, you can follow these steps:

Calculate the Wall Area

Measure the length and height of the wall to be plastered, then multiply the two to get the wall area.

Example:

Wall length = 4 m
Wall height = 1.5 m
Wall area = 4 m × 1.5 m = 6 m²

Use the Mortar Coverage

After determining the wall area, use the mortar coverage stated on the packaging to calculate the number of sacks needed.

Example:

1 sack of mortar (40 kg) covers 2.5 m².
Total requirement = Wall area ÷ Coverage per sack.
For a 6 m² wall → 6 ÷ 2.5 = 2.4 → rounded up to 3 sacks.
For a 7.2 m² wall → 7.2 ÷ 2.5 = 2.88 → rounded up to 3 sacks.

With this method, you can ensure the mortar you purchase matches your needs and avoid shortages or excess.

Advantages of Choosing Plaster Mortar Cement

Before selecting mortar for wall plastering, understand some of the advantages of plaster mortar cement that can make your work easier. All these benefits make the price of one sack of plaster mortar well worth the efficiency and quality of the final result. Here are the main benefits:

1. Ease and Practicality

Plaster mortar cement is very easy to use. You only need to add the right amount of water, and the mortar is ready to apply.

This product is formulated with a proper, homogeneous composition, ensuring consistent quality every time it’s used, without the hassle of manually mixing materials.

2. Time and Cost Efficient

Thanks to its practicality, wall plastering can be completed more quickly. This means you can save both time and labor costs, as there’s no need to mix materials manually.

As a result, projects can be completed more efficiently, allowing you to use your time and money more effectively.

3. Better Adhesion Strength

Plaster mortar cement is made from high-quality raw materials through a modern production process, giving it excellent adhesion strength.

The plastered surface becomes more solid and durable, minimizing the risk of cracks or wall damage and keeping the building strong in the long term.

4. Easy to Store

This product is specially packaged for easy storage and has a long shelf life. Its quality remains well-preserved even after long-term storage, and its practical packaging makes it easy to transport and place at the project site.

5. Guaranteed Quality and Consistency

With modern production techniques and premium materials, plaster mortar cement delivers neat, even, and clean results.

This consistency ensures every part of the wall has equal strength and durability, making the plastering work look more professional and long-lasting.

That concludes the information on how to calculate the coverage of one sack of plaster mortar and its benefits in construction work. It’s clear that accurate material calculation significantly affects a building's efficiency, strength, and durability.

One essential material that should never be overlooked is cement, as it’s used in nearly every stage of construction. For this need, you can choose Semen Merah Putih Watershield, a premium multipurpose cement with water-repellent technology that provides maximum protection against water seepage.

This product suits various applications, from foundations, concrete casting, and slabs to bricklaying, plastering, and finishing.

Want to find out more about the advantages of Semen Merah Putih products? Contact us now and get the best solutions for your construction needs.