Head Joint

Definition

A Head Joint is the vertical layer of mortar between the ends of masonry units.

Purpose

Head Joints are essential for bonding masonry units together, ensuring structural integrity and stability. They help distribute loads evenly across the masonry structure and prevent the infiltration of water and air.

Examples of Use

1. Brick Walls: The vertical mortar joints between bricks in a wall.
2. Stone Masonry: Mortar joints between stones in a stone wall or structure.
3. Concrete Blocks: Vertical joints between concrete blocks in a block wall.
4. Masonry Veneer: Joints between veneer units attached to structural walls.

Related Terms

• Bed Joint: The horizontal layer of mortar on which masonry units are laid.
• Mortar: A mixture of cement, lime, sand, and water used to bond masonry units together.
• Tuckpointing: The process of renewing the mortar joints in masonry construction.
• Grout: A fluid form of mortar used to fill gaps between tiles or masonry units.

Notes

Proper formation of head joints is critical for the durability and strength of masonry structures. Consistent thickness and full filling of the joints help prevent structural issues and water penetration.