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LathNet is a metal lath and drainage plane system that provides a continuous drainage plane between the lath and weather resistant barrier.

The Masonry Advisory Council recommends that in exterior adhered masonry wall systems, a drainage mat be installed to drain any water that has penetrated to the flashing. A galvanized expanded metal lath, or diamond mesh, should be attached atop the drainage mat.


  • Factory-assembled combination of mesh drainage plane and metal lath
  • Metal lath:  Self-furring 2.5 lb. G-60 galvanized expanded steel.
    • L:  97″ +1.5 -0   W:  27″ +/-0.375   T:  0.25″
  • Drainage mesh:  90% open weave polyester.
    • L:  95.5″ +/-0.5   W:  25.5″ +/- 0.25   T:  0.25″
  • Shipped in banded bundles of 10 sheets

Available Options

  • 3.4 lb., self-furring dimpled steel mesh
  • 0.4″ (10 mm) drainage mesh thickness

Available Accessories

  • Weep sill screed
    • 10′ length, 26 gauge G60 galvanized steel
  • Expanded corner bead
    • 10′ length
  • Double-V control joint
    • 10′ length
LathNet Drawing
LathNet Installation


  • Faster installation and fewer wall penetrations than installing a drainage plane and lath separately
  • Combines proven components in an engineered and tested system
  • Factory assembly ensures consistent quality
  • Clearly shows 1” minimum lath overlap to comply with ASTM C847
  • Promotes full lath encapsulation without clogging the drainage plane
  • Drainage mesh provides an effective mortar barrier to prevent bridging
  • Continuous drainage plane allows rapid, unrestricted moisture flow to the weep holes
  • Allows unrestricted air flow behind the lath to help promote drying
  • Created and backed by industry leader Mortar Net Solutions™ in partnership with ClarkDietrich™ Building Systems
  • Assembled in the USA from 100% USA-made materials
BD&C Top 101 Products 2016
Building Design & Construction names LathNet one of the top 101 new products for 2016