Which is the correct sequence for preparation of the surface for new pointing work?

Explanation:

1. Raking joints: This step involves removing any old mortar or debris from the joints to ensure that the new mortar adheres properly.

2. Cleaning surface and joints: After raking the joints, the surface and joints need to be thoroughly cleaned to remove any dust, dirt, or loose particles. This ensures better bonding of the new mortar.

3. Wetting surface and joints: Finally, the surface and joints should be wetted to prevent the masonry from absorbing too much water from the fresh mortar, which could weaken the bond and setting time.

Additional Information

Purpose of Pointing: Pointing is done to seal the joints between masonry units, such as bricks or stones, to improve both the appearance and durability of the structure. It helps prevent water penetration, weathering, and deterioration of the masonry.

• Types of Pointing: Various pointing techniques are used, including:

  • Tuck Pointing: Smooth, flush joints that provide a neat and clean finish.

  • Recessed Pointing: The mortar is recessed slightly below the surface of the brick, providing a distinct shadow line.

  • Struck Pointing: The mortar is sloped outward, helping to shed water away from the joint.

  • Beaded Pointing: The edges of the joints are rounded for a decorative effect.