HELPING THE OTHERS REALIZE THE ADVANTAGES OF STEEL ROOF

The roofer also reported there was some fungus/mildew developing in the attic (white places on some of the roof joists), which was an indication of lousy ventilation while in the attic. When I re-roof, must I'm going with the plywood compared to OSB? Really should I've the number of attic vents improved?Metallic roofing will usually give more Stren