Why are CFR panels typically not recommended for pitches less than ½” in 12″, like many single skin trapezoidal rib panels?
The panels when installed must resist momentary flooding, such as that caused by heavy rain and wind gusts. In addition to typical loads like HVAC equipment, CFR roof panels are subject to potential ponding at the endlaps when the roof bows under thermal load. Single skin panels on the other hand expand and contract linearly rather than by bowing up between the structural supports.
