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Diamond Mesh Lath

Galvanized, Expanded Steel Plaster aND Stucco Base

A superior, multi-purpose expanded steel substrate for Portland cement or widely used for interior and exterior gypsum plaster and stucco & stone reinforcement. Applications include ceilings, soffits, and fascia surfaces, and under ceramic tile in wall, ceiling, and floor applications. Metal lath is useful in general purpose applications and is the best lath available for ornamental work and for flat or contoured surfaces as well as for use as a reinforcing underlay for spray-applied fireproofing.

Application(s): Stone Veneer, Stucco

Expanded metal lath is formed from sheet steel that has been slit and expanded to form hundreds of “keys” per square yard. It is proven over time to possess exceptional strength and flexibility, making it the preferred metal base requested by contractors and design professionals.

2.5# and 3.4# metal lath are available in G90 coating with a special order and lead time. Diamond metal lath are also available with a 60-Minute Grade-D asphalt paper-backing (APB) weather resistant barrier.

ASTM & Code Standards:

  • Product specifications
    • ASTM C847 Metal Lath
    • ASTM C841 Veneer and plaster accessories
    • ASTM C1047 Beads and trims–metal–paper–vinyl
    • ASTM C933 Specification for welded wire lath
  • Material specifications
    • ASTM A1003 (NS33, ST33L, ST33H, ST50L, ST50H)
    • ASTM A653 Zinc-coated hot-dip process
    • ASTM A653/B69 Veneer and plaster accessories/standard spec for zinc strip
  • Protective coating standards
    • ASTM A653  Zinc-coated hot-dip process
    • ASTM C1047 Beads and trims–metal–paper–vinyl
  • Installation standards
    • ASTM C1063 Installation of metal plaster base systems
    • ASTM C1780 Installation of adhered manufactured stone veneer
    • ASTM C1861 Lathing and furring accessories and fasteners, for interior and exterior Portland Cement-Based Plaster
  • All ClarkDietrich Expanded Metal Lath is fabricated from prime galvanized steel, G60 zinc coating by the hot dipped method, conforming to Specification ASTM A653/A653M.

  • Intertek CCRR-0204 - Metal Lath - Code Compliance Research Report
    Check the updated list of Certified Production Facilities at Intertek's website at

PRoduct submittal SHeets

Click the below Product Code to view Submittal/Tech Datasheet.

Product Code Description
LAM Flat Diamond Mesh Lath (2.5lb and 3.4lb)

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