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Plastering and Rendering
Updated 9/26/2026
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What you'll learn
- Prepare walls correctly: clean, dampen, hack smooth concrete, fix mesh over joints
- Select and mix cement:sand ratios (1:4 to 1:6) for different wall types and coat thicknesses
- Apply plaster in two coats (12-15 mm total) using screeds, straightedge, trowel and float
- Finish surfaces with wood float, steel trowel or sponge for desired texture
- Identify and prevent common defects: cracking, debonding, crazing
About
Learn internal plaster and external render techniques — from wall preparation and mix ratios to application, finishing, and curing for durable walls.
What's inside· 10 lessons
- 1Common Defects and Their Causes
- 2Materials Estimate for a Plaster Bay
- 3Application Techniques: Screeds, Trowel, Float, Finish
- 4End Test
- 5Knowledge Check
- 6Introduction to Plastering and Rendering
- 7Corners, Edges and Curing
- 8Wall Preparation
- 9Mix Ratios and Coat Thickness
- 10Practice Materials Calculation
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