What is the minimum thickness of corrosion-resistant weep screed that must be provided at or below the foundation plate line on exterior stud walls?

The minimum thickness of corrosion-resistant weep screed required at or below the foundation plate line on exterior stud walls is 3-1/2 inches. This specification is established to ensure effective drainage of moisture and to protect the integrity of the wall assembly.

A weep screed serves as a critical component in managing water that may accumulate in the wall system, thereby preventing water damage, mold growth, and degradation of building materials. The height defined by the 3-1/2 inches is designed to meet minimum standards for moisture management, thereby ensuring that the bottom of the wall system remains above potential water intrusion from the ground level or adjacent surfaces.

This thickness is also consistent with building codes that prioritize the longevity of the structure by ensuring adequate measures against corrosion and moisture infiltration, especially in areas where grounding and moisture are concerns. Thus, 3-1/2 inches is the acceptable minimum thickness for weep screed as it balances functionality with code compliance.