What must typically be done to a single wythe wall for structural stability?

A single wythe wall, which consists of a single layer of masonry units, often requires additional structural support to ensure its stability, especially in tall or exposed applications. Anchoring it to a backup wall provides that crucial support, helping to resist lateral forces such as wind loads and to enhance the overall structural integrity of the building. The backup wall, typically made of a more robust material, acts as a gravitational and lateral stabilizer for the single wythe construction, thereby distributing loads more evenly.

Other options, such as painting, reinforcing with steel, or covering with insulation, do not directly address the foundational aspect of anchoring for stability. While reinforcement with steel can enhance strength, it is not always a requirement for every application, whereas anchoring is essential for the effective performance of a single wythe wall in practice.