What is the required air space between the sheathing and the veneer?

The correct answer indicates that there must be a specific minimum and maximum air space requirement between the sheathing and the veneer to ensure proper ventilation and moisture control. Having a minimum of 1 inch and a maximum of 4 1/2 inches creates an environment that allows for air circulation, which is crucial to prevent moisture buildup that could lead to mold growth or rot in the wall assembly. This range also helps in maintaining the integrity of the materials used by allowing them to “breathe,” thus prolonging their lifespan.

In construction standards, air gaps play a vital role in performance and durability; too little space can trap moisture, while too much can lead to structural inefficiencies or instability. This requirement reflects a consideration for the overall health of the building envelope. The other options do not provide the correct specifications as outlined in standard building practices, particularly if they suggest measurements outside of the prescribed range or imply no requirement at all.