Information on insulation practices for sprinkler system installations is very limited in the three NFPA sprinkler standards (13, 13R, and 13D). This Tech Tuesday will review the content of a white paper under development by the NFSA’s Insulation Task Group, which has representatives of the sprinkler industry as well as the insulation industry. Specifically, the different types and methods of insulation used, design criteria developed through mathematical models and historical data will be explained. Common shortfalls encountered during installation along with common failures will be illustrated, along with possible recommendations on how to avoid them. In addition, alternative methods, such as use of antifreeze, dry pipe sprinkler systems, heat tracing, or combinations of options will be highlighted.