Expert Guide
Plastering Work
External Plaster Calculator – Waterproofing Grade
Quality Inspector
Estimate materials for external wall plastering.
📐 Formula & Method
External plaster is thicker (20mm) and requires more material per unit area.
Volume = Area × Thickness × 1.33
📋 Worked Example
100 m² wall, 20mm thick (1:4 ratio): • Volume = 2 m³ wet → 2.66 m³ dry • Cement ≈ 15 bags
❓ Frequently Asked Questions
To provide better resistance against rain and weathering. It is often done in two coats (12mm + 8mm).
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