Richard writes from Medford, Massachusetts: "When I insulate in the boiler room can I insulate around the boiler flue pipe? At what temp can I place your insulation against hot temp surfaces?"

Answer: Standard fiberglass batt insulation is not made for insulating pipes, and it is not made for high temperature applications (above 250°F). Owens Corning and other manufacturers make pipe insulation for these types of applications. The first step in selecting the right pipe insulation is to find out what the maximum temperature of the pipe will be in your application.