Scratch Coat (Tartasha)

Overview:

A scratch coat, also known as “Tartasha” in Arabic, is the first rough plastering layer applied to walls and ceilings before the final finishing coat. This layer provides a textured surface to enhance adhesion for subsequent layers, ensuring durability and long-lasting plasterwork. It is commonly used in masonry, concrete, and blockwork applications.

Why You Should Use It:

• Enhances Adhesion: Creates a rough base for the finishing coat.
• Prevents Cracks: Reduces shrinkage and structural cracks in plaster.
• Durable & Strong: Increases the longevity of the plaster system.
• Weather Resistant: Protects against environmental damage.
• Improves Load Distribution: Helps evenly distribute stress across walls.

Key Features:

Uses:

• Base Layer for Plastering: Prepares the surface for the final smooth coat.
• Masonry & Concrete Walls: Enhances plaster adhesion to rough surfaces.
• Ceiling Coating: Ensures plaster sticks properly on ceilings.
• Exterior Wall Coating: Provides additional protection against moisture.
• Renovation Projects: Improves adhesion in restoration works.

Density & Composition:

Case Studies:

1. Residential Buildings: Used in luxury villas for crack-resistant walls.
2. Commercial Complexes: Applied in high-rise structures for durability.
3. Historical Renovations: Used to restore and reinforce old buildings.

Application Recommendations:

• Use Proper Mixing Ratio: 1 part cement to 2 or 3 parts sand for best results.
• Keep Surface Moist: Dampen the surface before application for better adhesion.
• Use a Notched Trowel: Creates grooves to improve mechanical bonding.
• Allow Proper Curing: Keep the scratch coat moist for at least 3 days.