Apply uniform layer of metal roofing base coat 6 inches each way of the gap at the overlap with a paintbrush.
Roof repair gap in tin.
In this video i show you a quick way to fix a hole in a tin metal roof that might of been caused by a fallen tree limb.
Typically this system is installed over a structural metal roof system where the existing roof system becomes the metal deck for the new roof system.
Repairing a metal roof seam with turbo poly seal is simple and it is a do it yourself p.
Cover the base coat with a piece of glass membrane fabric.
Cut the fabric to size with.
Both mesh and purlins reduce summertime heat penetration to the interior somewhat but i believe the significant advantage of the more effective ventilation gap provided by purlins is the reduction of the summertime temperature of the metal roofing itself.
Fill small nail holes with silicone caulk or roof cement.