Association - Masonry Veneer Manufacturers

A two-layer system is required over wood sheathing. The inner layer acts as the primary barrier, while the outer layer acts as a sacrificial layer and drainage plane. These must be applied in shingle fashion, lapped at least 2 inches horizontally and 6 inches vertically.

Manufacturers complying with MVMA standards generally ensure their products meet or exceed: Often above 1800 psi. Water Absorption: Must be managed to prevent damage. masonry veneer manufacturers association

The MVMA guidelines are designed to prevent moisture intrusion and ensure long-term structural integrity. A two-layer system is required over wood sheathing