In plastering of surfaces, the process of hacking is done to ensure:

Explanation:

1. Hacking is the process of roughening the surface of a wall or other substrate before plastering.
2. It is done to ensure better adhesion (bonding) between the plaster and the surface, as a rough surface provides a greater area for the plaster to grip, reducing the risk of delamination or peeling over time.

Additional InformationAdvantages of Hacking

Improved Adhesion:

1. • When you apply plaster to a smooth surface, the plaster tends to slide or peel off easily over time. By hacking, you create small grooves or indentations, which help the plaster grip the surface and form a stronger bond.

2. Prevention of Cracking and Delamination:

   • A proper bond between the plaster and the surface reduces the risk of cracks or delamination, which can occur when the plaster fails to stick properly.

3. Surface Preparation:

   • Before plastering, surfaces such as concrete or brick may have laitance (a weak, powdery layer), smooth textures, or contaminants. Hacking removes these issues by roughening the surface, ensuring better bonding for the plaster.

4. Techniques of Hacking:

   • Mechanical Hacking: Typically done using tools such as a hammer and chisel or mechanical roughening tools to create rough patches on the surface.

   • Chemical Hacking: Sometimes a chemical solution is applied to the surface to break down the smooth layer and enhance bonding.