What substrate should metal roofing panels be installed on?

We recommend a minimum of 15/32 plywood or 7/16 OSB decking.

We recommend a minimum of 15/32 plywood or 7/16 OSB decking. More information on specific Metal Roofing Installation recommendations can be found in our Metal Roofing Detail Manuals. Our manuals are categorized by the metal roofing profile. Be sure to review the Detail Manual that is specific to the profile you are looking to install. 

Detail Manuals can be found here : https://semetals.com/products/metal-roofing/