Event Description

In order to reach the net zero emissions goals of Massachusetts, designers need to focus on the key role the envelope plays in load reduction. This starts with the passive design principles of air tightness, continuous high thermal layer, and condensation control. This session will explain the prescriptive envelope requirements of the Massachusetts Stretch Energy Code, detail the methods for determining u-factors of assemblies, and demonstrate calculating the component performance calculation. While some portions of this course may be applicable to low-rise residential buildings the course will focus on commercial and multifamily buildings that fall under the 225 CMR 23.00 code.

Learning Objectives -

1. Define U-value, thermal bridging and understand the difference between nominal, clear-field and derated U-values
2. Understand prescriptive pathway limitations and the triggers for the component performance alternative.
3. Demonstrate derating exercise for the purposes of prescriptive code compliance, as well as the component performance alternative.
4. Become familiar with resources and tools for calculating derating per the Stretch Code.
5. Understand considerations for increased insulation in wall assemblies with regard to building physics.
6. Examine examples of documentation of Stretch Code requirements in Architectural drawing sets and specifications.
7. Understand the role of Comcheck among the component performance alternative and energy modeling requirements.