Technical Bulletin #301 looks at the use of Polyiso CI (with foil or coated glass facer) to provide a continuous layer of insulation on the exterior of residential housing (when used with wood or steel framed construction) to minimize thermal bridges and increase the overall thermal performance and energy efficiency of a home. This document covers various applications of Polyiso CI including: thermal insulation; thermal bridge reduction; water resistive barrier: air barrier; water vapor control; and fire performance.
Included in this technical bulletin are a number of illustrations comparing Polyiso CI with other insulation systems. A “Key Facts” summary and “Definitions” section provide addition and important information. A link to PIMA Technical Bulletin #301 is provided here