Boundary walls play a crucial role in protecting properties while also enhancing the exterior appearance. However, exposure to harsh weather, moisture, and environmental conditions can weaken walls over time. That’s where plastering comes in. Plaster not only strengthens the wall but also provides a smooth, durable, and attractive finish.
In this step-by-step guide, we’ll walk you through everything you need to know about applying plaster to a boundary wall — from preparation to finishing touches.
Step 1: Gather Tools and Materials
Before starting, make sure you have the right materials and tools:
- Materials: Cement, sand, water, bonding agent, waterproofing compound (optional).
- Tools: Trowel, hawk, wooden float, steel float, measuring bucket, spade, brush, and water sprayer.
Step 2: Prepare the Wall Surface
- Clean the wall thoroughly by removing dirt, dust, grease, or loose mortar.
- If the wall is old, scrub off previous plaster or paint.
- Use water to dampen the wall surface so that the plaster bonds properly.
Step 3: Mix the Plaster
- The standard ratio is 1 part cement : 4-6 parts sand, depending on the finish required.
- Add water slowly and mix until you get a smooth, workable paste.
- For exterior boundary walls, adding a waterproofing compound is recommended.
Step 4: Apply the First Coat (Base Coat)
- Start from the bottom of the wall and move upward.
- Spread plaster evenly using a trowel, maintaining a 10–12mm thickness.
- Level the surface with a straight edge or screed.
- Let it set slightly before moving to the next step.
Step 5: Apply the Second Coat (Finishing Coat)
- After the base coat has set, apply a thinner finishing coat (5–8mm).
- Use a steel float for smoothness or a wooden float for a textured finish.
- Keep the thickness uniform for a neat appearance.
Step 6: Curing the Plaster
- Proper curing is essential for strength and durability.
- Spray water lightly on the plastered wall for 7–10 days.
- Protect the wall from direct sunlight or heavy rain during curing.
Step 7: Final Touches
- Once cured, you can leave the plaster as is for a natural cement look, or paint it for enhanced aesthetics.
- Check for cracks or uneven spots and repair immediately.
Benefits of Boundary Wall Plaster
- Protects against rain, wind, and moisture.
- Increases wall durability and lifespan.
- Provides a clean, attractive finish.
- Reduces long-term maintenance costs.
✅ With these steps, you can ensure your boundary wall remains strong, weather-resistant, and visually appealing for years.
