PBR panel vs R-panel: what’s the difference?

The short answer

PBR stands for purlin bearing rib. On a PBR panel, the overlapping edge has an extra leg that rests on the purlin, so the lap is supported instead of floating. R-panel has the same general rib shape without that leg.

Side by side

• Shape — Both are exposed-fastener panels with tall trapezoid ribs. From a distance you can’t tell them apart.
• The overlap — PBR adds the purlin bearing leg on the overlap edge. R-panel doesn’t.
• Where you see them — PBR shows up often on commercial roofs and larger buildings. R-panel is common on shops, garages, and ag buildings.
• Fasteners — Both use exposed screws through the panel. Screw type and pattern come from the panel maker’s spec.

Which one fits your job

• Replacing or matching existing panels: match what’s on the building. Send a photo and a measurement of the rib.
• New roof on a larger or commercial building: PBR is the usual pick.
• Walls, shops, and garages: either works. The choice often comes down to what’s already on site and the spec.

What Ironworks carries

Ironworks carries PBR panel, AG panel, and R-panel. PBR is 26 gauge, in white, gray, tan, red, blue, black, copper, dark green. Additional colors are available by order.