Adapting Stucco & Stone Assemblies to Changing Codes

With Pennsylvania’s Uniform Construction Code (UCC) updating to the 2018 ICC codes in early 2022, one of the critical changes that building professionals will need to consider involves stucco and stone wall assemblies. During the UCC code adoption process, provisions impacting stucco and stone were adopted based on language out of the 2021 International Residential Code. This session will dive into the changes that will have a significant impact on the design and installation of exterior plaster assemblies.

Learning Objectives

1. Review the code provisions adopted into the PA Uniform Construction Code that impact stucco and stone wall assemblies.
2. Discuss the impact of new lath installation provisions for exterior plaster assembly including fastener layout and spacing.
3. Examine the implications on building performance of new water-resistive barrier requirements that impact both stucco and stone assemblies.
4. Understand the new requirements for rainscreen gaps in stucco and stone wall assemblies, including associated material options, costs, and performance.