The use of non-metallic plaster bases (lath) is growing in the construction industry, and minimum consensus standards are being set  for installation, test methods and performance requirements. A task group within Subcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products is currently developing three lath standards:

ASTM WK24554, Test Method for Non-Metallic Plaster Bases (Lath) Used with Portland Cement Based Plaster;

ASTM WK24555, Specification for Installation of Non-Metallic Plaster Bases (Lath) Used with  Portland Cement Based Plaster; and 

ASTM WK24556, Specification for Non-Metallic Plaster Bases (Lath) Used with Portland Cement  Based Plaster.

Subcommittee C11.02 is part of ASTM International Committee C11 on Gypsum and Related Building Materials and Systems.

According to William Egan, manager, engineering and development, BASF Construction Chemicals  LLC-Wall Systems, and a C11 member, each of the proposed new standards will help assure that non-metallic lath products perform adequately, provide a means for design professionals to generically specify products and guide contractors in installation.

“We expect that the proposed standards will be widely used and accepted after they’ve been approved,” says Egan. “However, they’re probably of most interest to design professionals, contractors, building owners and building officials.”

All interested parties are invited to contribute to the ongoing development of these three work items. “It would be particularly helpful to have input and participation from additional manufacturers of non-metallic lath that currently do not participate in the ASTM standards development process,” says Egan.

For technical information, contact: William Egan, BASF Construction Chemicals LLC, Jacksonville, Fla. (phone: 904-996-6115; bill.egan@basf.com). ASTM Committee C11 meets Nov. 9-11 during November Committee Week in Atlanta, Ga.
 
ASTM International welcomes and encourages participation in the development of its standards. ASTM’s open consensus process, using advanced Internet-based standards development tools, ensures worldwide access for all interested individuals. For more information on becoming an ASTM member, please contact Thomas O’Toole, ASTM International (phone: 610-832-9739; totoole@astm.org).

Release #8323