Technical Bulletins

Up to date product information, solutions and best practices are addressed in our technical bulletins. Need a solution – call us at 1 800 887 4708



Recommended Fasteners for Structa Lath

Issued: March 2016   1. Wood framing – vertical.                          Nails – 0.1205-inch (11 ga ) diameter, 7/16-inch head diameter, barbed galvanized roofing nails. Minimum length – 1-inch. Screws – 0.120-inch shank diameter, 7/16-inch diameter pan or wafer head, galvanized sharp point wood screws Staples – 16 ga diameter, crowns not less than ¾-inch, galvanized.  …


Wire Tying along Horizontal Side Laps

Issued: July 2015   Section 7.8.1 of ASTM C1063 states that side laps of metal plaster bases must be wire tied between supports at intervals not more than 9 inches. Historically, Structa Wire laths have not been wire tied at side laps. Over many years, the resulting stucco claddings have not shown or experienced failures  …


Galvanizing Lath – Standards & Specifications

Issued: June 2015   LATH  GALVANIZING  SPECIFICATIONS IN BUILDING CODES   Corrosion protection of metals including lathing for  cement  plaster  (stucco)  is  governed  by  building codes. Corrosion protection is prescribed as galvanization. The  following  outlines  the  standards  and requirements for galvanization that are now in effect in the US states that have adopted the IBC and IRC codes:  In Table 2507.2 titled “Lath, Plastering Materials and Accessories”, the International Building Code (IBC) cites ASTM C847 – Metal Lath; ASTM C933 – Welded Wire lath; and ASTM C1032 – Woven wire plaster base. In Table 2511.1 titled  …


Reinforcement for Veneer Stone

PROBLEMS AND SOLUTIONS Prepared by: William Spilchen P.Eng. – Consulting Engineer The application of simulated or manufactured stone veneer has grown dramatically over recent years. The numerous products are attractive and enhance the architectural appeal of facades. They are significantly more economical and easier to install as compared to real stone. Unfortunately, problems with simulated  …


Recommended Installation For 3 Coat Stucco over CMU’s with EPS Foam

July 28th, 2010 Revised – January 2014   The application of lath and stucco over CMU’s must always be done with great care. As compared to other wall constructions, CMU’s have a high thermal mass and hence do not expand or contract appreciably on a daily basis. However, the stucco cladding will heat up and  …


Recommended Installation of Control Joints

Issued – November 2019 UPDATE Control or expansion joints are the Stucco industry’s solution for minimizing and controlling cracking in stucco wall systems. There is controversy and confusion in our industry about their use and installation – particularly as to whether the lath should be continuous or discontinuous (cut) at the control joint. However this  …


Fastener Attachment (Staples)

Prepared: February 12, 2013   Structa Wire approves the use of Staples with Structa products based upon fastener attachment testing performed by Intertek ETL Semko on Structalath No 17 SFCR II Lath in accordance with ICC-ES AC 191 Section 3.6.4 protocol.   The fasteners evaluated were a construction staple – No 16 gauge, one inch  …


Fire Wall Assemblies for Stucco

Mega Lath and Structalath Twin Trac Approved for Fire Wall Assemblies Structa Wire Corp. approves the use of Structalath Twin Trac for rated fire wall assemblies as an alternate to laths specified as 2.5 pound metal lath, 1 ½ inch woven wire lath, or where unspecified metal lath is prescribed. Structa Wire Corp. also approves  …


Two Product Enhancements

Released – December 8, 2010   Improved Mega Lath To enhance the performance of our Mega Lath product we have made design improvements that increase the strength of the lath and thereby reduce cracking potential as well as allow spans at 24” on centers Mega Lath now weighs 1.95 lb/yd2 and as per ASTM  …