An "outside corner" refers to the external angle or edge where two walls or surfaces meet. This is typically seen in the building's exterior or in interior spaces where walls form an outward-facing angle. Outside corners are critical in construction as they often require specific detailing to ensure structural integrity, weatherproofing, and aesthetic appeal.

Key considerations for outside corners in construction include:

1. Structural Integrity: Ensuring that the corner is strong enough to support the building's load and resist environmental stresses.

2. Weatherproofing: Proper sealing and flashing are essential to prevent water ingress, which can lead to damage over time.

3. Aesthetic Finish: The corner should be finished in a way that aligns with the overall design of the building, which may involve specific materials or techniques to achieve a desired look.

4. Material Compatibility: The materials used at the corner should be compatible with those of the adjoining surfaces to prevent issues like differential movement or thermal expansion.

5. Thermal and Acoustic Insulation: Ensuring that the corner provides adequate insulation to maintain energy efficiency and soundproofing.

In practice, the treatment of outside corners can vary depending on the materials used (e.g., brick, concrete, steel, or timber) and the specific architectural requirements of the project. In the context of building setbacks and boundaries, the Australian Building Codes Board (ABCB) provides guidelines for determining the setbacks of buildings from property boundaries . For corner sites, the setback from the secondary road is typically 3 meters