What is the minimum to maximum air gap when installing brick veneer?

The correct choice reflects the standard requirement for the air gap when installing brick veneer. An air gap of 1 inch is essential to allow for moisture drainage and ventilation, helping to prevent moisture buildup behind the brick veneer which can lead to mold and structural issues. The upper limit of 4.5 inches is established to ensure that there is sufficient space for proper airflow, allowing any trapped water to evaporate without compromising the integrity of the wall assembly.

Maintaining this air gap is crucial not only for moisture management but also for thermal considerations as it aids in insulation and energy efficiency. It's important to adhere to building codes and best practices which establish these parameters, ensuring the longevity and performance of the brick veneer system.