The RBI Roof R-Panel system is specifically engineered for corrugated metal roof applications. The base of the system small and lightweight, condensing freight and making installation easier. Sheet metal roofs must be 26 ga. or thicker, with flat trapezoidal peaks at least 0.75” wide. The system can be built on sloped roofs less than 45 degrees. The RBI Roof R-Panel system is UL 2703 listed for bonding and grounding, as well as UL 1703 Class A fire rating for Type 1 and 2 modules.