Masonry Veneer Manufacturers Association -

A weep screed with a minimum vertical attachment flange of 3.5 inches is required at the base of the wall to drain moisture. This should be placed at least 4 inches above earth or 2 inches above paved surfaces. Lath Requirements: Self-furred metal lath (minimum 2.5 lb/ yd2y d squared

The guidelines offer detailed instructions for installing over cement board and other modern substrates. Manufacturer Responsibilities

) or 18-gauge woven wire mesh is required to meet ASTM standards (C847 or C1032). masonry veneer manufacturers association

Proper ground clearance and flashing are essential at all intersections to prevent damage, such as from efflorescence. Best Practices & Innovations

A space must be created behind the mortar scratch coat to allow for drainage. A weep screed with a minimum vertical attachment flange of 3

For increased moisture management, particularly in high-humidity areas, the MVMA encourages the use of rainscreen systems (drainage mats) to improve air space, according to Consumers Concrete.

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. Manufacturer Responsibilities ) or 18-gauge woven wire mesh

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