As noted previously@ there are many proprietary ICF systems@ and building codes do not offer general guidance about ICF construction. This report provides background information that is useful for designing and building ICF structures. It also supplements proprietary information available from individual manufacturers with general information applying to most ICFs. This report is also useful to building officials and other professionals who may work with ICFs. Construction in the United States has undergone several important changes in the past century. With these changes have come codes and standards to assist owners@ building officials@ designers@ and contractors in constructing quality structures that are durable and sustainable@ with more emphasis on energy efficiency. Quality-of-life issues are also being addressed@ either through codes or other building criteria@ notably the development of green building rating systems and programs promoting greater energy efficiency and sustainability (USGBC 2010). Occupant health@ safety@ and general well-being??for example@ resilient construction?? are also being identified as important factors in building construction practices@ integrating entire building envelopes into a cohesive system. This ultimately is moving today??s industry toward more sustainable structures that are longer-lasting and resilient enough to reduce rebuilding@ thereby reducing energy consumption. Research on ICFs is addressed in detail throughout this document. Manufacturers should provide specific@ detailed information about their proprietary products and tests demonstrating performance of the ICF in meeting the intent of applicable building codes. Whether this information is available as an evaluation service report or some other technical report@ it should allow a licensed design professional to determine whether an ICF is appropriate for a particular application.