There is growing evidence that PCB exposure, in both vapor and particulate matter form, emanate from PCB-containing products in the building environment. The purpose of this white paper is to 1) provide an overview of currently available information pertaining to PCBs in construction materials; 2) evaluate the exposure potential for building occupants, maintenance and construction personnel; and 3) identify gaps in the current knowledge base that would help occupational and environmental health professionals to better understand the risk to public health from PCBs in building materials.