The most critical application points on low-slope roof systems are at flashings, penetrations and accessories. These critical junctures account for the majority of roof leaks. Problems at these points typically arise from improper application methods and the use of inappropriate or incompatible materials. Designers and specifiers should pay close attention to roofing details in these areas and make sure their instructions are followed by installing contractors in the field. In all cases, use the roof system manufacturer’s approved products and complete the roofing details in accordance with their requirements.