Pointing in Construction: Meaning, Types & Advantages | Civil Engineering Optional for UPSC PDF Download

What is Pointing in Construction?

The Process of Pointing

1. Rake Out Mortar Joints: Mortar joints are raked out, leaving a depth of 1 to 2 cm.
2. Clean Joints: These joints are cleaned to remove loose mortar.
3. Wet Joints: The joints are made wet.
4. Apply Fresh Mortar: Fresh mortar is applied and pressed into the joints using a spatula or other tools.
5. Cure Mortar: The new mortar must be allowed to cure for a few days. The number of days depends on the type of mortar used.

Types of Pointing in Construction

1. Flush Pointing

   • Filling the raked mortar with fresh mortar flush between two bricks or stones.
   • Results in a smooth finish and visually appealing wall.
   • Eliminates spaces that can collect water and dust.

2. Recessed Pointing

   • Filling the raked joints with mortar up to a certain depth, not all the way to the surface.
   • A suitable tool is used to press the mortar to a depth of about 5 mm.
   • Should be avoided in regions with heavy rainfall due to potential water accumulation.

3. Struck Pointing

   • Mortar between the bricks is pressed to form an incline.
   • A small trowel is used to create a recessed bottom edge.
   • The brick below sticks out.

4. Beaded Pointing

   • A concave-edged steel or iron rod is pressed into the mortar to create a beaded joint.
   • Visually appealing but more susceptible to damage.

5. Tuck Pointing

   • Filling the raked mortar with fresh mortar and creating a groove at the center.
   • The groove is filled with white cement putty, leaving a small projection.
   • Creates an aesthetic wall while also improving its life.

6. Keyed or Grooved Pointing

   • Fresh mortar is pressed to form a flush point.
   • A tool known as a pointer is used to create a groove in the mortar joint.
   • The grooves lock the bricks or stones in place.

7. V Pointing

   • Similar to keyed or grooved pointing but results in a V-shaped groove.
   • A V-shaped tool is used to create the effect.

8. Weathered Pointing

   • The upper edge of the mortar is recessed, creating a slope.
   • Rainwater can drain down these walls quickly.
   • The final look is that of a weathered building.

Advantages of Pointing in Construction

• Protection: It protects the mortar joints from weathering impact and other external elements.
• Sealing Gaps: Helps seal gaps between the bricks to prevent dampness usually caused by rainwater penetrating the walls.
• Strength and Stability: Adds strength and stability to the masonry structure.
• Aesthetics: Improves the appearance of walls.