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
) or 18-gauge woven wire mesh is required to meet ASTM standards (C847 or C1032). masonry veneer manufacturers association
The MVMA guidelines are designed to prevent moisture intrusion and ensure long-term structural integrity. A weep screed with a minimum vertical attachment flange of 3
Manufacturers complying with MVMA standards generally ensure their products meet or exceed: Often above 1800 psi. Water Absorption: Must be managed to prevent damage. The MVMA guidelines are designed to prevent moisture
A space must be created behind the mortar scratch coat to allow for drainage.
The guidelines offer detailed instructions for installing over cement board and other modern substrates. Manufacturer Responsibilities