Cement Plaster for Construction Homes

Complete Guide in Simple English

When we build a house, one of the most important finishing steps is plastering the walls.
Plastering gives the house a smooth, strong, and clean surface.
The most common type used in Pakistan and around the world is Cement Plaster.

In this blog, we’ll explain everything about Cement Plaster — what it is, why it’s used, its benefits, disadvantages, and how it’s applied correctly.
Let’s start in simple and easy language.

1. What is Cement Plaster?

Cement Plaster is a mixture of cement, sand, and water used to cover rough brick or block walls.
It gives a smooth and strong surface ready for painting or finishing.

It works as a protective layer that keeps walls safe from rain, heat, and dust.

Usually, cement plaster is used on both interior and exterior walls, and also on ceilings.

2. Why We Use Cement Plaster in Construction Homes

Cement plaster is used because it: Cement Plaster for Construction Homes

• Makes walls smooth and even

• Protects bricks from weather damage

• Increases wall strength and durability

• Provides a good base for paint or wall putty

• Adds beauty and a clean look to your home

Without plaster, the walls stay rough and absorb water easily, which can damage paint and structure.

3. Materials Used in Cement Plaster

For high-quality plaster, you need the right materials in the right ratio.

4. Cement Plaster Mix Ratio

The mix ratio depends on where it’s used:

Example:
If you are using a 1:6 mix, that means 1 part cement and 6 parts sand.

5. Thickness of Cement Plaster

The thickness also depends on wall condition:

• Interior walls: 12 mm to 15 mm

• Exterior walls: 15 mm to 20 mm

• Ceilings: 6 mm to 12 mm

For uneven brickwork, more thickness may be needed.

6. Step-by-Step Process to Apply Cement Plaster

Step 1: Surface Preparation

• Clean the wall surface from dust, oil, and loose particles.

• Wet the wall properly before applying plaster.
  (This helps cement bond better and prevents cracks.)

Step 2: Mix Preparation Cement Plaster for Construction Homes

• Mix cement and sand in required ratio.

• Add clean water slowly and mix well until a smooth paste forms.

Step 3: Applying the Plaster

• Apply first coat with a trowel on the wall surface.

• Level it using a straight wooden or steel screed.

Step 4: Finishing

• After the first coat starts setting, apply a thin second coat for a smooth surface.

Step 5: Curing

• Keep the plastered wall wet for at least 7 days using water twice a day.
  (Curing increases plaster strength and prevents cracks.)

7. Benefits of Cement Plaster

a. Strong and Durable

Cement plaster makes the wall hard and long-lasting.
It can handle weather, impact, and wear.

b. Waterproof Protection

When done properly, it reduces water absorption in walls.
Exterior plaster keeps rainwater out.

c. Smooth Finish

Provides an even surface for paint, wall putty, or tiles.

d. Fire Resistant

Cement plaster does not burn and protects walls from heat.

e. Suitable for All Surfaces

It can be used on bricks, blocks, or RCC surfaces.

f. Cost-Effective

Compared to gypsum or lime plaster, cement plaster is economical and widely available.

8. Disadvantages of Cement Plaster

a. Time Consuming

Curing needs 7 days or more, which increases construction time.

b. Cracks

If curing is not done properly, small cracks can appear.

c. Heavy Weight

It adds extra load on walls compared to gypsum plaster.

d. Rough Finish

It needs wall putty later for a smooth paint finish.

e. Skilled Labor Required

Improper application can lead to uneven surface and cracks.

9. Cement Plaster vs Gypsum Plaster

10. How to Get a Perfect Plaster Finish

Here are some professional tips used by experts at Al Naafay Construction Company Lahore:

1. Always use clean river sand (no dust or clay).

2. Wet the wall before plastering.

3. Use proper ratio of cement and sand.

4. Always cure for minimum 7 days.

5. Check surface with leveler for smoothness.

6. Avoid plastering during very hot weather.

7. Don’t add too much water — it weakens plaster.

11. Types of Cement Plaster Finishes

There are different styles of finish depending on your design need:

a. Smooth Finish

Fine finish for indoor walls, later painted or polished.

b. Sand Face Finish

Slightly rough texture, used mostly on outer walls for better look.

c. Rough Cast Finish

Used in boundary walls or farmhouse designs, gives strong outdoor texture.

d. Pebble Dash Finish

Decorative style — small stones are pressed into wet plaster for design.

12. Common Problems in Cement Plaster

Even good plaster can face issues if not applied properly:

13. Tools Used for Cement Plaster Work

• Trowel: For applying plaster

• Float: For leveling surface

• Plumb Bob: For checking vertical alignment

• Straight Edge: For smooth leveling

• Brush and Bucket: For curing and cleaning

Using good quality tools helps get a professional finish.

14. Cement Plaster Life Span

A well-applied cement plaster can last 25 to 30 years or even more with proper maintenance.
Regular painting and minor repairs keep it looking fresh and strong.

15. Cement Plaster in Modern Construction

In cities like Lahore, Karachi, Islamabad, cement plaster is still the most used wall finishing material because:

• It is affordable

• Works in all climates

• Easily available

• Suitable for all building types

Even luxury homes with gypsum inside still use cement plaster outside for durability.

16. Maintenance of Cement Plaster Walls

• Paint every 4–5 years to protect surface

• Fix small cracks quickly

• Avoid water leakage or dampness

• Use quality waterproof paint outside

Regular maintenance keeps the wall healthy and prevents damage.

17. Cost of Cement Plaster in Pakistan (2025)

The price depends on material and labor rates.

For premium finishing with waterproof cement and neat leveling, cost can go slightly higher.

18. Advantages of Using Cement Plaster by Professionals

When you hire a professional construction company like Al Naafay Construction Lahore, you get:

• Proper wall alignment

• No cracks

• Smooth surface

• Accurate mix ratio

• Perfect finishing ready for paint

That’s why good workmanship is more important than just good materials.

19. Eco-Friendly Options

Now many companies offer eco-friendly cement plaster that uses fly ash and recycled materials.
It helps reduce environmental pollution and improves insulation.

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