Welded wire lath, together with its accessories, is used behind stone, traditional stucco or tile installations. The metal lath is to enhance the reinforcement of plaster and exterior stucco cladding, and reduce cracking during and after the construction.

Generally, the welded wire lath could be flat and self-furring, with or without backing, reinforced or not reinforced are all supplied. the backing is either absorptive or water resistant. Water resistant backing provides protection against wetness during stucco curing. The welded wire lath backing paper must has a bursting strength which is no less than the strength to move under normal hand or machine pressures.
Welded Wire Lath Specification:

Materials: cold-drawn steel wire.
Surface finish: zinc coating conforming to specification ASTM A641/A641M.
Welded wire diameter: 0.0625 in. (1.588 mm).
Features:

Increase stucco and plaster embedment.
Reduce stucco and plaster cracking by transferring pressure.
Fur depth of 1/4" provides for ideal stucco embedment.
Efficient working, easily cuts with scissors or a knife.
the easy-to-handle character enhances workers' safety, satisfaction and productivity.
Easy to installation for common residential construction (9 feet 3 inches wall height).
Fire resistant.
Cold-drawn steel wire being greater strength.
Welded technique helps all wires to provide a reinforcing truss.
Welded joints of accessories provide structural integrity and superior stiffness.
Flat-furring design ensures there will be no damage to the vapour barrier.
Packaging and marking (per ASTM C993):

the backing shall be attached to the lath to prevent accidental removal during shipping, handling or installation.
Welded wire lath would be packaged in bundles, rolls, or pallets.
Bundles, rolls, or pallets all marked with metal tags or paper tags.
Plastic or metal banding, or paper wrapping on rolls.