Seminar: Installation of Control Joints in Stucco Claddings
The NWCB and members of the Wall and Ceiling Conference (WCC) continue to be involved with ASTM to update current ASTM Standards, referenced by the International and Residential Building Code, that relate directly to the installation of framing, drywall, finishing, acoustical ceilings as well as EIFS and Stucco claddings. Over the years, the installation of control joints in stucco claddings has been a contentious issue. ASTM C1063 states that lath behind control shall be discontinuous. This is fine until there are no framing members for attachment of cut lath or the control joint. In those cases, the NWCB and WCC contend that the lath may be continuous. To put this issue to rest, the WCC is in the process of constructing ten separate mockups representing different methods of lath and control joint installation to determine the effectiveness of each method towards reducing stucco cracking.
If you are a wall and ceiling contractor, you don’t want to miss this seminar. Representatives from the WCC, Ben Duterte and Mike Nonn will explain the various test assemblies and provide you with the results of each test. If current proposed changes are made to ASTM C1063, the lath shall always be discontinuous at control-joint locations regardless of backing. Our goal is to establish, once and for all, that continuous lath behind control joints has no effect on stucco cracking.
This program will be presented at 11:45 am on Saturday, May 6.