3′ Tuf Rib Metal Roofing Panels The 3’ Tuf Rib panel is Flatiron Steel’s most economical metal roofing system. When produced in 29 gauge, with Flatiron Steel’s Valspar’s Weather XL 40-year paint system, this roofing system is similarly priced to most 30 year impact resistant shingle roofing systems. With clean traditional lines, this panel profile…