JORGENSEN ROOFING SECRETS

The roofer also reported there was some fungus/mildew increasing in the attic (white spots on some of the roof joists), which was an indication of very poor air flow in the attic. Once i re-roof, really should I go With all the plywood as opposed to OSB? Should I have the amount of attic vents greater?We have in excess of a hundred twenty five year