Back-Up Brick

Definition

A back-up brick is a load-bearing or structural component of a masonry wall constructed of brick. It provides essential support and stability to the wall and serves as the foundational element against which a veneer, typically a non-structural facing layer, is attached.

Purpose

The primary purpose of a back-up brick is to provide structural integrity and load-bearing capacity to a masonry wall. It supports the weight of the building and ensures the stability of the structure. Additionally, back-up bricks serve as a solid base for attaching a veneer, enhancing the aesthetic appeal of the wall while maintaining its structural soundness.

Examples of Use

1. Residential Construction: In residential buildings, back-up bricks form the core structure of exterior walls, with a decorative brick veneer added for aesthetic purposes.
2. Commercial Buildings: In commercial construction, back-up bricks provide the necessary strength to support multi-story structures, with various veneer materials used to achieve desired architectural finishes.
3. Historical Restoration: When restoring historic buildings, back-up bricks are often preserved or replicated to maintain the structural integrity and original appearance of the masonry walls.
4. Facade Renovations: During facade renovations, new veneers are attached to existing back-up brick walls to update the building’s exterior without compromising its structural stability.

Related Terms

• Veneer: A non-structural outer layer of brick or other materials attached to the back-up brick for decorative purposes.
• Masonry Wall: A wall constructed using individual units of brick, stone, or concrete, bonded together with mortar.
• Load-Bearing Wall: A wall that supports the weight of the elements above it, transferring loads to the foundation.
• Mortar: A mixture of cement, sand, and water used to bond bricks or stones together in masonry construction.

Notes

• Material Quality: The quality of the back-up brick is crucial for the overall durability and strength of the masonry wall. High-quality bricks ensure better load-bearing capacity and longevity.
• Installation Techniques: Proper installation techniques are essential to ensure the back-up bricks provide adequate support and stability. This includes correct alignment, spacing, and mortar application.
• Maintenance: Regular inspection and maintenance of masonry walls, including back-up bricks, are necessary to address issues such as cracking or water infiltration that can compromise structural integrity.
• Compatibility: The back-up brick and the attached veneer must be compatible in terms of thermal expansion and contraction to prevent cracking and separation over time.